CA2226777C - Handle means for percussive hand held machines - Google Patents
Handle means for percussive hand held machines Download PDFInfo
- Publication number
- CA2226777C CA2226777C CA002226777A CA2226777A CA2226777C CA 2226777 C CA2226777 C CA 2226777C CA 002226777 A CA002226777 A CA 002226777A CA 2226777 A CA2226777 A CA 2226777A CA 2226777 C CA2226777 C CA 2226777C
- Authority
- CA
- Canada
- Prior art keywords
- handle frame
- side members
- power tool
- housing
- portable power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/02—Construction of casings, bodies or handles
- B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
- B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/04—Handles; Handle mountings
- B25D17/043—Handles resiliently mounted relative to the hammer housing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/006—Vibration damping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
- B25D2250/371—Use of springs
- B25D2250/381—Leaf springs
Abstract
A breaker machine has a freely disposed outer handle frame (20; 21 1; 120) which can be gripped all around by hand and is positioned in spaced relation around the rear end of the machine housing (10). In a preferred embodiment the frame consists of mutually opposed side members (21) and two handles (22, 23) formed as cross-members (22, 23) to said side members (21). Bent saddle-like, the handle frame (20; 21 1; 120) surrounds the machine housing (10) and carries in a vibration suppressed state the machine housing (10) by the aid of opposed flanges (16, 17) on the side members (21) and vibration damping means (27-30) on the machine housing (10). A third cross-member (24) is connected to the side members (21) and forms an arcuate plate which is actuatable by the operator's leg and surrounds in freely spaced disposition the machine housing (10) in opposed position to the handles (22, 23). The handle frame (20; 21 1;
120), designed as an integral arcuate pressure-tight tube, is arranged as a fuel tank (121) when the breaker machine is driven by a combustion engine.
120), designed as an integral arcuate pressure-tight tube, is arranged as a fuel tank (121) when the breaker machine is driven by a combustion engine.
Description
HANDLE ~UEANS F'OR PERCUSSIVE HAND HELD MACHINES
~ The presenvt: invention relates to handle means for percussive hand held machines of the type comprising ~ a machine 1.-~ousing with a hammer mechanism therein adapted to repeatedly impact against a working tool projecting out from said machine housing, said handle means being connected to the machine housing through thEA medium of vibration damping means where-by said handle means, by handgrips that project out-wardly fronn said handle means, are adapted for vibraratior~. suppressed feeding by hand of said ma-chine housing in the longitudinal direction of said worlcing tocrl.
As typical examples of such handle means there can be referred to patent publications US 3 451 492 (SE
226 416) and EP 0 104 154. In them the handle means fulfill an acceptably adapted function substantially only at the: feed proper, while moving to a new place or a new point of tool application, due to the imba-lanced weight distribution of the machine in rela-tion to the: handle means, means that the machine housing has to be touched direct for purposes of shifting th.e position upward ar to the side. This demands contacting parts of the machine that are un-suited for lbeing touched i.e. vibrating parts and parts that due to operation have turned hot or be-come dirty. That is inconvenient and tiring for the operator and involves risk for injuries. In par-ticular in combustion engine driven percussive ma-' chines there is produced heat that radiates out both from the motor and the hammer mechanism. The weight-saving compact build-up of hand held machines nor-mally leads to that the fuel tank is placed near the motor, conventionally often with the tank made in plastic mat~s:rial, and that involves the risk of the tank swelling, the danger of spill against hot parts from cracked tanks and during fueling, and distur-bances by fuel pressed out into the fuel system or the environment when the tank becomes overheated.
An object of the invention, in handle means of the above-mentioned type, is to create an outer handling frame through which handling and directing of the machine will be effectively improved. As a benefit is attained, that all necessary actuating points during normal working operations around the machine housing become vibration suppressed while direct contact with the machine during any form of handling is obviated, whereby shifting of the working posi-tions can be performed conveniently, without risk, and witH~ increased safety for the operator. At the same time the inventive handling frame, due to its spacing in assembled state relative to the machine and in particular in cases when the hammer mecha-nism's drive is a combustion motor, is well suited to be formed as a tight highly strong tubular fuel tank for the motor, which increases the safety against heating of the fuel and fire set to spilled fuel. The overpressure in such case can be locked safely within the tank without risk for formation of cracks, so that fuel spill to the environment and overflooding of the motor interior from the tank via the carburetor is avoided. In a robust normal embo-diment, the handling frame furthermore functions as an impact absorbing protection if the machine hap-pens to fall from upright working position or is carelessly treated during transportation. The ob-jects accounted for above are attained by the characterizing features of the claims following hereinafter .
2a According to one aspect of the present invention, there is provided a handle frame for a portable power tool, wherein said portable power tool comprises a housing, a hammer mechanism provided in said housing, and an elongate working implement having an impact receiving end extending into said housing for receiving impacts in a longitudinal direction from said hammer mechanism, said handle frame comprising: two parallel elongate side members disposed on opposite sides of said housing and extending in a first plane parallel to a tool application direction, each of said side members having a forward end portion located in said tool application direction and a rear end portion located in a direction opposite to said tool application direction;
mountings provided on said side members for connecting said handle frame to said housing of said portable power tool in a vibration damped manner; two handgrips laterally extending from said side members for enabling manual support and control of said portable power tool during operation; a forward arcuate cross-member interconnecting said forward end portions of said side members; and a rear arcuate cross-member interconnecting said rear end portions of said side members; wherein said forward cross-member is disposed in a second plane forming an angle with said first plane, and said forward cross-member has a larger extent in a direction perpendicular to said tool application direction than said housing of said portable power tool, thereby forming an auxiliary handgrip and protecting the housing of said portable power tool.
The invent:i.on is described in more detail by the aid of the enca.osed drawings, wherein Fig 1 shows an em-bodiment rE~presented by a hand held percussive ma-chine, i.e. a breaker machine, viewed from the rear, i . a . from t::he side of the machine from which the operator cc~~ntrols the machine by the handle frame comprised in the handle means according to the in-vention. The protective casing is partly sectioned open for showing, in principle schematically, under-lying parts.
Fig. 2 shows the handle frame in Fig. 1 alone, re-moved from the breaker.
Fig. 3 shows a top view of the handling frame and indicates b;y broken lines an alternative embodiment.
Fig. 4 shows a side view of the handle frame in the alternative embodiment of Fig. 3 and with a late-rally directed handgrip removed.
Fig. 5 showa a side view of the handle frame in Fig.
4 mounted on the breaker in Fig. 1 while handled by the operato:~_ during work.
Figs. 6 - 8 show, in correspondence with Fig. 5, how the operator- handles the breaker, respectively, when moving it try the next working position, at double-handed grip~:~ing and lifting it laterally, and when transportincx it carried by one hand.
' Fig. 9 show: an embodiment of the handle frame apart from the brE~:aker in Fig. 1 and made as a fuel tank in cases when the breaker is driven by a combustion engine.
Fig. 10 shows a top view of the fuel tank in Fig. 9 and indicates by broken lines an alternative embo-diment corresponding to the one shown a.n broken li-nes in Fig. 3.
Fig. 11 shows a section on the line 11-11 in Fig. 9 and illustrates schematically the fuel system of the combustion engine.
Fig. 12, finally shows, in a side view and somewhat diminished, the breaker lying on the ground in a position for being refueled.
The breaker in Fig. 1 includes a machine housing 10, the greater part of which is enclosed by a fixed protective casing 15 that extends around a schema-tically indicated drive motor of suitable construc-tion, for example a combustion motor or a motor driven pneumatically, hydraulically or by electric power, as exemplified in the above-mentioned EP
patent publication. The drive motor 11 is con-structed together with a hammer mechanism 13 which within the machine housing 10 is designed to re-peatedly strike a working tool 12 projecting out from the machine housing 10, such as a tamper (Fig, 1), chisel, spade or breaking tool 121 (Figs. 5,12).
The machine housing 10 and its built-in hammer me-chanism 13 may in adapted embodiment suitably be of the type shown in patent publication US 5 052 498.
Manual handling of the breaker is made possible by handle means which surround the part of the machine housing 10 that lies distal from the tool 12 and extend in spaced relation to the protective casing 15, so as to form a handle frame 21-23 which en-ables balanced horizontal and vertical alignment of the machine, normally together with the tool 12, relative to the workpiece. The handle frame 20 in-cludes mutually opposing parallel side members 21 which extend along and straddlle the machine housing while d:i_sposed in a longitudinal plane common therewith. The handle frame 20 is shaped by mutually connecting the side members 21 by at least one cross-member, in Fig. 1 shown as two such, an upper and a lower cross-member 22,23 which bridge the in-terposed machine housing 10 at the opposite ends of the side mE::mbers 21. A preferred embodiment is to shape the Dandle frame 20 as an integral arcuate handgrip ojplastic material or metal, preferably a closed steE~l tube. The cross-members 22, 23 are preferably inclined outwardly and i.n a forward di-rection away from the machine operator, so as to offer the Chest gripping position. I:n this regard, the upper c::ross-member 22 forms a lifting and ma-chine aligr~.ing handle, Figs. 6,7, at the rear end of the maehins~~ housing 10, and the lower cross-member 23 a carrying handle, Figs. 7,8, by means of which the machine: housing 10 during transportation is carried in a horizontal balanced state with said carrying handle 23 located above the region of its intermediate part, in Fig. 8, as evident, in ver-tical alignment with the center of gravity 41, c.f.
Fig. 1, of the breaker. In outward direction late-rally extending handgrips 18, of a type common in breakers, acre supported by the side members 21 at mutually the same level. In case side members 21 of tubular design are to be used, fastening holes 251, 252, 253 provided by through crosstubes as shown in Fig. 4 illustrate that the handgrips 18 can be fas-tened by screws to the side members 21 at selective ' height in order to adapt the working position at the machine housing 10 to operators of different tall-ness. A throttle lever 19 of appropriate conven-tional design intended for operationally controlling the drive motor 11 and preferably associated with a Bowden-transmission, is allocated to one of the handgrips 18. By virtue of the operator pushing down on the handgrips 18, the downward tool-feeding force necessary for work is in the usual way applied to the machine housing 10 and is directed in the longi-tudinal direction of the machine housing 10 and the tool 12 as indicated by arrow 40, Fig. 1.
The side members 21 carry in their common longi-tudinal plane mutually facing flanges 16, 17 which project into the fixed protective casing 15 via longitudinally extending slots 26. The flanges 16, 17 are secured to the machine housing 10 by suitable vibration damping means, resulting in that the hand-le means 20 always will be dampened against vibra-tions when the machine is in use and handled, and the machine housing will be kept mainly balanced in the horizontal plane, Fig. 8. The longitudinal slots 26 in the protective casing 15 are in respect of the vibrations dimensioned so that when the machine is working, the flanges 16, 17 always will be able to move freely and remain vibration-free in said slots, both longitudinally and transversely a.n relation to the protective casing 15.
In order to avoid harmful rotational vibration and failing directional rigidity, the flanges 16,17 may for example be associated with longitudinal guides or slides in the machine housing 10 as well as with resilient elements such as rubber blocks or steel springs, not shown, inserted between the flanges and the machine housing. For balancing at its best, the vertical projection 41 of the center of gravity of the machine housing should fall into the region be-tween the side members 21 and the outermost vibra-tion damping means at the flanges 16,17. However, in order to avoid transmittal of vibration by the gui-des, it is ;referred, as indicated in Fig. 1, to use - at least a pair of leaf springs 27,29 and 28,30, respectivel;~r, which are disposed transversely to the feeding dir~s:ction 40 and form bridges mutually interconnecting the outer portions of the flanges 16,17 on both side members 21 to the interdisposed machine hou3ing 10. The leaf springs 27-30 assure, as a result of them alone, that t=he vibrations du-ring Work wall be controlled to describe purely parallel mo~rement without causing contact between the handle :frame 20 and the machine housing 10, and assuring sua:ficient directional rigidity during aligning of the machine housing 10 by the handle frame 20 without the use of interposed sliding sup-ports or gu:i.des placed in the feeding direction .
This result:~ in high vibration suppression comple-tely unaffected by frictional disturbances. The leaf spring arrangement is described in detail in patent application PCT/SE/00913 filed concurrently with this application and need not be described in more detail here,.
In the emboc;liment of Fig. 5 the handle frame 201 is associated with a third cross-member 24 formed by an arcuate cro:~s-plate 24 directed towards the operator in the work».ng position of the machine housing 10.
The cross-p~L.ate 24 is connected to the side members 21 in the re::gion of an intermediate portion of the machine hou:~ing 10 so as to respectively offer pro-tection, anct a pushing surface when the machine hou-' sing 10 is too be actuated by the operators knee for directional adjusting purposes, c.f. Fig. 6 and the broken-line variant in Fig. 3. Thanks to the stiff-ening influe::nce of the cross-p:Late 24 on the side members 21, it will be possible in case of need to omit any ons: or even both of the cross-members 22 , 23 that are directed away from the operator and never-theless attain that the side members will function passably as a handle frame.
As an alternative the handle frame 20 can, if desi- ' red, carry the protective casing 15 by itself as a part that surrounds but is separate from the machine housing 10, not shown. The casing can in such case, additionally to be protective, be given sound-dam-ping and/or cooling-air leading tasks, and as a part adjacent to the handle frame 20 be supported with full clearance from or partially guided (worsened vibration damping) around or by the machine housing 10. In such case the protective casing, as well, by the aid of the vibration dampening means becomes vibration suppressed in relation to the machine hou-sing 10, and the vibration suppressing counteracting mass will thereby be advantageously increased.
When the novel main build-up of the handle frame 20 in closed tubular shape is to be applied together with combustion engine driven hammering machines, the frame advantageously should be used as a fuel tank mounted separated from the machine for increa-sed safety. In addition to safety one hereby gains that the fuel mass outside of the machine will im-prove the vibration dampening of the handle system during work, while concurrently therewith the ten-dency of the fuel to form internal air bubbles due to vibration will be reduced, such bubbles otherwise would disturb motor operation. Such an embodiment is illustrated by the combined fuel tank and handle frame 120, Fig. 9-12, intended to be mounted on the machine housing 10 instead of the handle frame 20 in Fig . 1 .
Outwardly t:he handle frame 120 is designed in ana-logy with t:.he handle frame 20 and corresponding parts have in Fig. 9-12 been given the same numerals as in Figs. 1-8. The handle frame 120 thus incorpo-rates a base structure formed by the side members 21 and the handle cross-members 22,23 Which jointly are utilized for horizontally and vertically balanced directional. alignment of the breaker via the flanges 16,17 in a 'Way described hereinabove and shown in Figs. 1-8. As before, a further cross member pro-vides leg-p:~rotection as an additional option to the handle frame 120. The side mealbers 21 and the cross-members 22,:23, i.e. the base structure of the handle frame 120, are formed by a closed pressure vessel designed as a handle-like hand-grippable pressure-tight high-strength metal tube:, preferably of stain-less steel. That tube represents the fuel tank of the breaker and is bent in double arch-shape in or-der to be a1't~le to be placed saddle-like to ride on the breaker as a conveniently round--about grippable handle framca outside the protective casing 15, With the flanges 16,17 coupled to the machine housing 10 via the vib»~ation dampening means 2 7-30 .
At the tran:~ition between the cross-member 22 and one of the ;side members 21 the handle-frame or fuel-tank 120 is associated with a replenishment collar 34 which has a threaded cover 50. The collar 34 is directed re~i.rward-upward relative to the plane of the cross-me:~mber 22 in order to enable convenient refueling in upright position of the machine and allows, in ease of need, circumferential refueling in slanting upright position at an angle of 45 de-grees. Due t:o the collar 34 pointing to the rear, it will be all right to tank even when the machine rests on the: ground, see Fig. 12, with the cross-member 23 and the machine housing 10 or, as the case may be, the breaking tool 121 as supports.
A suction conduit 43 extends to the lower portion of the handle frame or fuel tank 120 within one of the side members 21. Via an outer nipple and a conduit 44 the suction conduit 44 is connected to the carbu-retor 45 of the combustion engine 11. A starting pump 46 fills, by suction through a connecting con-duit 48, the carburetor 45 by fuel before starting and sucked-in excess fuel is returned to a nipple on the fuel tank 20 via a connection 47.
The base structure 21-23 of the handle frame 120 can, for purposes of more pleasant gripping, be en-closed by plastic (polyurethane) which also decrea-ses outer heating for example by strong sun-light.
The overpressure valve 49, Fig. 9, assures release of fuel as a result of an increase in press-ure by heat at a threshold value over .2 bar, and in normal use prevents outward spill in liquid form. Flooding of the motor 11 when stopped and influenced by inner and outer heat that create overpressure in excess, as well as during motor-transportation in inappro-priate position at unintentional fuel transmission to the motor, such behavior can be avoided thanks to the strong pressure resistant metal base structure 21-23 by closing the tank 120 through the medium of a valve 42, Fig. 9,11. In case of need even the overpressure valve 49 can be designed as a part of the valve 42 and the handle frame or fuel tank 120 can thus be totally shut-off by said valve 42 so that any spill out into the nature will be preven-ted. Normal plastic fuel tanks would swell under the influence of heat and in the worst case, if old, would risk to burst.
~ The presenvt: invention relates to handle means for percussive hand held machines of the type comprising ~ a machine 1.-~ousing with a hammer mechanism therein adapted to repeatedly impact against a working tool projecting out from said machine housing, said handle means being connected to the machine housing through thEA medium of vibration damping means where-by said handle means, by handgrips that project out-wardly fronn said handle means, are adapted for vibraratior~. suppressed feeding by hand of said ma-chine housing in the longitudinal direction of said worlcing tocrl.
As typical examples of such handle means there can be referred to patent publications US 3 451 492 (SE
226 416) and EP 0 104 154. In them the handle means fulfill an acceptably adapted function substantially only at the: feed proper, while moving to a new place or a new point of tool application, due to the imba-lanced weight distribution of the machine in rela-tion to the: handle means, means that the machine housing has to be touched direct for purposes of shifting th.e position upward ar to the side. This demands contacting parts of the machine that are un-suited for lbeing touched i.e. vibrating parts and parts that due to operation have turned hot or be-come dirty. That is inconvenient and tiring for the operator and involves risk for injuries. In par-ticular in combustion engine driven percussive ma-' chines there is produced heat that radiates out both from the motor and the hammer mechanism. The weight-saving compact build-up of hand held machines nor-mally leads to that the fuel tank is placed near the motor, conventionally often with the tank made in plastic mat~s:rial, and that involves the risk of the tank swelling, the danger of spill against hot parts from cracked tanks and during fueling, and distur-bances by fuel pressed out into the fuel system or the environment when the tank becomes overheated.
An object of the invention, in handle means of the above-mentioned type, is to create an outer handling frame through which handling and directing of the machine will be effectively improved. As a benefit is attained, that all necessary actuating points during normal working operations around the machine housing become vibration suppressed while direct contact with the machine during any form of handling is obviated, whereby shifting of the working posi-tions can be performed conveniently, without risk, and witH~ increased safety for the operator. At the same time the inventive handling frame, due to its spacing in assembled state relative to the machine and in particular in cases when the hammer mecha-nism's drive is a combustion motor, is well suited to be formed as a tight highly strong tubular fuel tank for the motor, which increases the safety against heating of the fuel and fire set to spilled fuel. The overpressure in such case can be locked safely within the tank without risk for formation of cracks, so that fuel spill to the environment and overflooding of the motor interior from the tank via the carburetor is avoided. In a robust normal embo-diment, the handling frame furthermore functions as an impact absorbing protection if the machine hap-pens to fall from upright working position or is carelessly treated during transportation. The ob-jects accounted for above are attained by the characterizing features of the claims following hereinafter .
2a According to one aspect of the present invention, there is provided a handle frame for a portable power tool, wherein said portable power tool comprises a housing, a hammer mechanism provided in said housing, and an elongate working implement having an impact receiving end extending into said housing for receiving impacts in a longitudinal direction from said hammer mechanism, said handle frame comprising: two parallel elongate side members disposed on opposite sides of said housing and extending in a first plane parallel to a tool application direction, each of said side members having a forward end portion located in said tool application direction and a rear end portion located in a direction opposite to said tool application direction;
mountings provided on said side members for connecting said handle frame to said housing of said portable power tool in a vibration damped manner; two handgrips laterally extending from said side members for enabling manual support and control of said portable power tool during operation; a forward arcuate cross-member interconnecting said forward end portions of said side members; and a rear arcuate cross-member interconnecting said rear end portions of said side members; wherein said forward cross-member is disposed in a second plane forming an angle with said first plane, and said forward cross-member has a larger extent in a direction perpendicular to said tool application direction than said housing of said portable power tool, thereby forming an auxiliary handgrip and protecting the housing of said portable power tool.
The invent:i.on is described in more detail by the aid of the enca.osed drawings, wherein Fig 1 shows an em-bodiment rE~presented by a hand held percussive ma-chine, i.e. a breaker machine, viewed from the rear, i . a . from t::he side of the machine from which the operator cc~~ntrols the machine by the handle frame comprised in the handle means according to the in-vention. The protective casing is partly sectioned open for showing, in principle schematically, under-lying parts.
Fig. 2 shows the handle frame in Fig. 1 alone, re-moved from the breaker.
Fig. 3 shows a top view of the handling frame and indicates b;y broken lines an alternative embodiment.
Fig. 4 shows a side view of the handle frame in the alternative embodiment of Fig. 3 and with a late-rally directed handgrip removed.
Fig. 5 showa a side view of the handle frame in Fig.
4 mounted on the breaker in Fig. 1 while handled by the operato:~_ during work.
Figs. 6 - 8 show, in correspondence with Fig. 5, how the operator- handles the breaker, respectively, when moving it try the next working position, at double-handed grip~:~ing and lifting it laterally, and when transportincx it carried by one hand.
' Fig. 9 show: an embodiment of the handle frame apart from the brE~:aker in Fig. 1 and made as a fuel tank in cases when the breaker is driven by a combustion engine.
Fig. 10 shows a top view of the fuel tank in Fig. 9 and indicates by broken lines an alternative embo-diment corresponding to the one shown a.n broken li-nes in Fig. 3.
Fig. 11 shows a section on the line 11-11 in Fig. 9 and illustrates schematically the fuel system of the combustion engine.
Fig. 12, finally shows, in a side view and somewhat diminished, the breaker lying on the ground in a position for being refueled.
The breaker in Fig. 1 includes a machine housing 10, the greater part of which is enclosed by a fixed protective casing 15 that extends around a schema-tically indicated drive motor of suitable construc-tion, for example a combustion motor or a motor driven pneumatically, hydraulically or by electric power, as exemplified in the above-mentioned EP
patent publication. The drive motor 11 is con-structed together with a hammer mechanism 13 which within the machine housing 10 is designed to re-peatedly strike a working tool 12 projecting out from the machine housing 10, such as a tamper (Fig, 1), chisel, spade or breaking tool 121 (Figs. 5,12).
The machine housing 10 and its built-in hammer me-chanism 13 may in adapted embodiment suitably be of the type shown in patent publication US 5 052 498.
Manual handling of the breaker is made possible by handle means which surround the part of the machine housing 10 that lies distal from the tool 12 and extend in spaced relation to the protective casing 15, so as to form a handle frame 21-23 which en-ables balanced horizontal and vertical alignment of the machine, normally together with the tool 12, relative to the workpiece. The handle frame 20 in-cludes mutually opposing parallel side members 21 which extend along and straddlle the machine housing while d:i_sposed in a longitudinal plane common therewith. The handle frame 20 is shaped by mutually connecting the side members 21 by at least one cross-member, in Fig. 1 shown as two such, an upper and a lower cross-member 22,23 which bridge the in-terposed machine housing 10 at the opposite ends of the side mE::mbers 21. A preferred embodiment is to shape the Dandle frame 20 as an integral arcuate handgrip ojplastic material or metal, preferably a closed steE~l tube. The cross-members 22, 23 are preferably inclined outwardly and i.n a forward di-rection away from the machine operator, so as to offer the Chest gripping position. I:n this regard, the upper c::ross-member 22 forms a lifting and ma-chine aligr~.ing handle, Figs. 6,7, at the rear end of the maehins~~ housing 10, and the lower cross-member 23 a carrying handle, Figs. 7,8, by means of which the machine: housing 10 during transportation is carried in a horizontal balanced state with said carrying handle 23 located above the region of its intermediate part, in Fig. 8, as evident, in ver-tical alignment with the center of gravity 41, c.f.
Fig. 1, of the breaker. In outward direction late-rally extending handgrips 18, of a type common in breakers, acre supported by the side members 21 at mutually the same level. In case side members 21 of tubular design are to be used, fastening holes 251, 252, 253 provided by through crosstubes as shown in Fig. 4 illustrate that the handgrips 18 can be fas-tened by screws to the side members 21 at selective ' height in order to adapt the working position at the machine housing 10 to operators of different tall-ness. A throttle lever 19 of appropriate conven-tional design intended for operationally controlling the drive motor 11 and preferably associated with a Bowden-transmission, is allocated to one of the handgrips 18. By virtue of the operator pushing down on the handgrips 18, the downward tool-feeding force necessary for work is in the usual way applied to the machine housing 10 and is directed in the longi-tudinal direction of the machine housing 10 and the tool 12 as indicated by arrow 40, Fig. 1.
The side members 21 carry in their common longi-tudinal plane mutually facing flanges 16, 17 which project into the fixed protective casing 15 via longitudinally extending slots 26. The flanges 16, 17 are secured to the machine housing 10 by suitable vibration damping means, resulting in that the hand-le means 20 always will be dampened against vibra-tions when the machine is in use and handled, and the machine housing will be kept mainly balanced in the horizontal plane, Fig. 8. The longitudinal slots 26 in the protective casing 15 are in respect of the vibrations dimensioned so that when the machine is working, the flanges 16, 17 always will be able to move freely and remain vibration-free in said slots, both longitudinally and transversely a.n relation to the protective casing 15.
In order to avoid harmful rotational vibration and failing directional rigidity, the flanges 16,17 may for example be associated with longitudinal guides or slides in the machine housing 10 as well as with resilient elements such as rubber blocks or steel springs, not shown, inserted between the flanges and the machine housing. For balancing at its best, the vertical projection 41 of the center of gravity of the machine housing should fall into the region be-tween the side members 21 and the outermost vibra-tion damping means at the flanges 16,17. However, in order to avoid transmittal of vibration by the gui-des, it is ;referred, as indicated in Fig. 1, to use - at least a pair of leaf springs 27,29 and 28,30, respectivel;~r, which are disposed transversely to the feeding dir~s:ction 40 and form bridges mutually interconnecting the outer portions of the flanges 16,17 on both side members 21 to the interdisposed machine hou3ing 10. The leaf springs 27-30 assure, as a result of them alone, that t=he vibrations du-ring Work wall be controlled to describe purely parallel mo~rement without causing contact between the handle :frame 20 and the machine housing 10, and assuring sua:ficient directional rigidity during aligning of the machine housing 10 by the handle frame 20 without the use of interposed sliding sup-ports or gu:i.des placed in the feeding direction .
This result:~ in high vibration suppression comple-tely unaffected by frictional disturbances. The leaf spring arrangement is described in detail in patent application PCT/SE/00913 filed concurrently with this application and need not be described in more detail here,.
In the emboc;liment of Fig. 5 the handle frame 201 is associated with a third cross-member 24 formed by an arcuate cro:~s-plate 24 directed towards the operator in the work».ng position of the machine housing 10.
The cross-p~L.ate 24 is connected to the side members 21 in the re::gion of an intermediate portion of the machine hou:~ing 10 so as to respectively offer pro-tection, anct a pushing surface when the machine hou-' sing 10 is too be actuated by the operators knee for directional adjusting purposes, c.f. Fig. 6 and the broken-line variant in Fig. 3. Thanks to the stiff-ening influe::nce of the cross-p:Late 24 on the side members 21, it will be possible in case of need to omit any ons: or even both of the cross-members 22 , 23 that are directed away from the operator and never-theless attain that the side members will function passably as a handle frame.
As an alternative the handle frame 20 can, if desi- ' red, carry the protective casing 15 by itself as a part that surrounds but is separate from the machine housing 10, not shown. The casing can in such case, additionally to be protective, be given sound-dam-ping and/or cooling-air leading tasks, and as a part adjacent to the handle frame 20 be supported with full clearance from or partially guided (worsened vibration damping) around or by the machine housing 10. In such case the protective casing, as well, by the aid of the vibration dampening means becomes vibration suppressed in relation to the machine hou-sing 10, and the vibration suppressing counteracting mass will thereby be advantageously increased.
When the novel main build-up of the handle frame 20 in closed tubular shape is to be applied together with combustion engine driven hammering machines, the frame advantageously should be used as a fuel tank mounted separated from the machine for increa-sed safety. In addition to safety one hereby gains that the fuel mass outside of the machine will im-prove the vibration dampening of the handle system during work, while concurrently therewith the ten-dency of the fuel to form internal air bubbles due to vibration will be reduced, such bubbles otherwise would disturb motor operation. Such an embodiment is illustrated by the combined fuel tank and handle frame 120, Fig. 9-12, intended to be mounted on the machine housing 10 instead of the handle frame 20 in Fig . 1 .
Outwardly t:he handle frame 120 is designed in ana-logy with t:.he handle frame 20 and corresponding parts have in Fig. 9-12 been given the same numerals as in Figs. 1-8. The handle frame 120 thus incorpo-rates a base structure formed by the side members 21 and the handle cross-members 22,23 Which jointly are utilized for horizontally and vertically balanced directional. alignment of the breaker via the flanges 16,17 in a 'Way described hereinabove and shown in Figs. 1-8. As before, a further cross member pro-vides leg-p:~rotection as an additional option to the handle frame 120. The side mealbers 21 and the cross-members 22,:23, i.e. the base structure of the handle frame 120, are formed by a closed pressure vessel designed as a handle-like hand-grippable pressure-tight high-strength metal tube:, preferably of stain-less steel. That tube represents the fuel tank of the breaker and is bent in double arch-shape in or-der to be a1't~le to be placed saddle-like to ride on the breaker as a conveniently round--about grippable handle framca outside the protective casing 15, With the flanges 16,17 coupled to the machine housing 10 via the vib»~ation dampening means 2 7-30 .
At the tran:~ition between the cross-member 22 and one of the ;side members 21 the handle-frame or fuel-tank 120 is associated with a replenishment collar 34 which has a threaded cover 50. The collar 34 is directed re~i.rward-upward relative to the plane of the cross-me:~mber 22 in order to enable convenient refueling in upright position of the machine and allows, in ease of need, circumferential refueling in slanting upright position at an angle of 45 de-grees. Due t:o the collar 34 pointing to the rear, it will be all right to tank even when the machine rests on the: ground, see Fig. 12, with the cross-member 23 and the machine housing 10 or, as the case may be, the breaking tool 121 as supports.
A suction conduit 43 extends to the lower portion of the handle frame or fuel tank 120 within one of the side members 21. Via an outer nipple and a conduit 44 the suction conduit 44 is connected to the carbu-retor 45 of the combustion engine 11. A starting pump 46 fills, by suction through a connecting con-duit 48, the carburetor 45 by fuel before starting and sucked-in excess fuel is returned to a nipple on the fuel tank 20 via a connection 47.
The base structure 21-23 of the handle frame 120 can, for purposes of more pleasant gripping, be en-closed by plastic (polyurethane) which also decrea-ses outer heating for example by strong sun-light.
The overpressure valve 49, Fig. 9, assures release of fuel as a result of an increase in press-ure by heat at a threshold value over .2 bar, and in normal use prevents outward spill in liquid form. Flooding of the motor 11 when stopped and influenced by inner and outer heat that create overpressure in excess, as well as during motor-transportation in inappro-priate position at unintentional fuel transmission to the motor, such behavior can be avoided thanks to the strong pressure resistant metal base structure 21-23 by closing the tank 120 through the medium of a valve 42, Fig. 9,11. In case of need even the overpressure valve 49 can be designed as a part of the valve 42 and the handle frame or fuel tank 120 can thus be totally shut-off by said valve 42 so that any spill out into the nature will be preven-ted. Normal plastic fuel tanks would swell under the influence of heat and in the worst case, if old, would risk to burst.
Claims (12)
1. ~A handle frame for a portable power tool, wherein said portable power tool comprises a housing, a hammer mechanism provided in said housing, and an elongate working implement having an impact receiving end extending into said housing for receiving impacts in a longitudinal direction from said hammer mechanism, said handle frame comprising:
two parallel elongate side members disposed on opposite sides of said housing and extending in a first plane parallel to a tool application direction, each of said side members having a forward end portion located in said tool application direction and a rear end portion located in a direction opposite to said tool application direction;
mountings provided on said side members for connecting said handle frame to said housing of said portable power tool in a vibration damped manner;
two handgrips laterally extending from said side members for enabling manual support and control of said portable power tool during operation;
a forward arcuate cross-member interconnecting said forward end portions of said side members; and a rear arcuate cross-member interconnecting said rear end portions of said side members;
wherein said forward cross-member is disposed in a second plane forming an angle with said first plane, and said forward cross-member has a larger extent in a direction perpendicular to said tool application direction than said housing of said portable power tool, thereby forming an auxiliary handgrip and protecting the housing of said portable power tool.
two parallel elongate side members disposed on opposite sides of said housing and extending in a first plane parallel to a tool application direction, each of said side members having a forward end portion located in said tool application direction and a rear end portion located in a direction opposite to said tool application direction;
mountings provided on said side members for connecting said handle frame to said housing of said portable power tool in a vibration damped manner;
two handgrips laterally extending from said side members for enabling manual support and control of said portable power tool during operation;
a forward arcuate cross-member interconnecting said forward end portions of said side members; and a rear arcuate cross-member interconnecting said rear end portions of said side members;
wherein said forward cross-member is disposed in a second plane forming an angle with said first plane, and said forward cross-member has a larger extent in a direction perpendicular to said tool application direction than said housing of said portable power tool, thereby forming an auxiliary handgrip and protecting the housing of said portable power tool.
2. ~The handle frame according to claim 1, wherein said rear cross-member has a larger extent in a direction opposite to said tool application direction than said tool housing of said portable power tool, and wherein said rear cross-member is also arranged to form an auxiliary handgrip.
3. ~The handle frame according to claim 2, wherein said angle formed between said first plane and said second plane is less than 90°.
4. ~The handle frame according to claim 3, further comprising an intermediate cross-member extending between said side members in a region between said rear end portions and said forward end portions of said side members, said intermediate cross-member comprising an arcuate plate which extends around a part of said housing of said portable power tool in a contact-free manner, and said intermediate cross-member forming a vibration damped support surface adapted to be put in body contact with an operator of the power tool.
5. ~The handle frame according to claim 4, wherein said side members as well as said forward cross-member and said rear cross-member comprise an integral, one-piece tubing unit.
6. ~The handle frame according to claim 5, wherein said hammer mechanism of said portable power tool comprises a combustion engine, and said integral, one-piece tubing unit comprises a fuel tank for said combustion engine.
7. ~The handle frame according to claim 5, wherein said mountings comprise two oppositely directed flanges disposed substantially in said first plane, said flanges being insertable into side openings provided in a protective casing surrounding said housing of said portable power tool, and wherein vibration damping elements are disposed inside said protective casing of said portable power tool.
8. ~The handle frame according to claim 1, wherein said angle formed between said first plane and said second plane is less than 90°.
9. ~The handle frame according to claim 1, further comprising an intermediate cross-member extending between said side members in a region between said rear end portions and said forward end portions of said side members, said intermediate cross-member comprising an arcuate plate which extends around a part of said housing of said portable power tool in a contact-free manner, and said intermediate cross-member forming a vibration damped support surface adapted to be put in body contact with an operator of the power tool.
10. ~The handle frame according to claim 1, wherein said side members as well as said forward cross-member and said rear cross-member comprise an integral, one-piece tubing unit.
11. ~The handle frame according to claim 10, wherein said hammer mechanism of said portable power tool comprises a combustion engine, and said integral, one-piece tubing unit comprises a fuel tank for said combustion engine.
12. ~The handle frame according to claim 1, wherein said mountings comprise two oppositely directed flanges disposed substantially in said first plane, said flanges being insertable into side openings provided in a protective casing surrounding said housing of said portable power tool, and wherein vibration damping elements are disposed inside said protective casing of said portable power tool.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9502594A SE507186C2 (en) | 1995-07-13 | 1995-07-13 | Handle for hand held percussion breaker hammer |
| SE9502594-6 | 1995-07-13 | ||
| SE9502593A SE507185C2 (en) | 1995-07-13 | 1995-07-13 | Handle for hand held percussion breaker hammer |
| SE9502593-8 | 1995-07-13 | ||
| PCT/SE1996/000914 WO1997002930A1 (en) | 1995-07-13 | 1996-07-04 | Handle means for percussive hand held machines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2226777A1 CA2226777A1 (en) | 1997-01-30 |
| CA2226777C true CA2226777C (en) | 2007-04-10 |
Family
ID=26662346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002226777A Expired - Lifetime CA2226777C (en) | 1995-07-13 | 1996-07-04 | Handle means for percussive hand held machines |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6112831A (en) |
| EP (1) | EP0837757B1 (en) |
| JP (1) | JP4044960B2 (en) |
| CA (1) | CA2226777C (en) |
| DE (1) | DE69616059T2 (en) |
| WO (1) | WO1997002930A1 (en) |
Families Citing this family (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4219006B2 (en) * | 1998-05-20 | 2009-02-04 | レッキス工業株式会社 | Diamond core drill with protector |
| DE19834443B4 (en) * | 1998-07-30 | 2004-07-01 | Wacker Construction Equipment Ag | Device and method for controlling the speed of an internal combustion engine |
| DE29912548U1 (en) * | 1999-07-17 | 1999-10-21 | Narex Ceska Lipa As | mixer |
| ES2165325B1 (en) * | 2000-06-14 | 2003-06-16 | Jimenez Angel Retuerta | KNEE PROTECTOR FOR FRUIT LINEAR VIBRATORS. |
| DE10106050B4 (en) * | 2001-02-09 | 2017-02-16 | Hilti Aktiengesellschaft | Hand tool with an additional handle |
| DE20105768U1 (en) * | 2001-03-30 | 2001-06-21 | Bomag Gmbh | Vibration rammer |
| US6749365B2 (en) * | 2002-03-18 | 2004-06-15 | M-B-W Inc. | Vibration isolation for a percussion rammer |
| US6865779B2 (en) * | 2003-01-24 | 2005-03-15 | David D. Gillanders | Ergonomic brace for inline power tool |
| DE10357758A1 (en) * | 2003-12-10 | 2005-07-21 | Wacker Construction Equipment Ag | Break-away and / or rotary hammer with linearly guided grip device |
| AU2004319839B2 (en) * | 2004-05-20 | 2010-06-03 | Cembre S.P.A. | Impact motorized wrench |
| US20060207063A1 (en) * | 2005-03-01 | 2006-09-21 | Multiquip. Inc. | Vibration dampening handle |
| SE529839C2 (en) * | 2005-05-26 | 2007-12-04 | Atlas Copco Constr Tools Ab | Switching tool with vibrated handle device |
| JP5041575B2 (en) * | 2006-03-07 | 2012-10-03 | 日立工機株式会社 | Impact tool |
| EP2012978B1 (en) * | 2006-03-07 | 2016-08-03 | Hitachi Koki Co., Ltd. | Electrical power tool |
| DE102006000207A1 (en) * | 2006-04-28 | 2007-10-31 | Hilti Ag | Hand tool with adjustable handles |
| JP4195045B2 (en) * | 2006-05-31 | 2008-12-10 | 三笠産業株式会社 | Rammer protective cover structure |
| US7896575B2 (en) * | 2008-02-20 | 2011-03-01 | Wacker Neuson Corporation | Soil compactor having low profile muffler |
| EP2123406B1 (en) * | 2008-05-19 | 2011-12-21 | AEG Electric Tools GmbH | Vibration dampened holder for additional hand grip |
| DE102008050323A1 (en) * | 2008-10-04 | 2010-04-08 | Protool Gmbh | Hand machine tool with a handle arrangement |
| CN101691030B (en) * | 2008-12-26 | 2012-05-02 | 安阳市天佑铁路材料科技有限责任公司 | Railway multifunctional railway electric wrench |
| JP5652241B2 (en) * | 2011-02-18 | 2015-01-14 | 日立工機株式会社 | Portable work machine |
| US9561546B1 (en) * | 2013-05-15 | 2017-02-07 | Clam Corporation | Drill attachment |
| EP2871288B1 (en) * | 2013-11-12 | 2016-03-16 | Delmag GmbH & Co. KG | Diesel pile driver |
| EP2871286B1 (en) | 2013-11-12 | 2016-03-23 | Delmag GmbH & Co. KG | Pile driver |
| US10378169B2 (en) * | 2014-10-02 | 2019-08-13 | Timothy Hamilton | Hydraulic pole tamper handle assembly and adapter kit |
| US11325235B2 (en) * | 2016-06-28 | 2022-05-10 | Black & Decker, Inc. | Push-on support member for fastening tools |
| US11267114B2 (en) | 2016-06-29 | 2022-03-08 | Black & Decker, Inc. | Single-motion magazine retention for fastening tools |
| US11400572B2 (en) | 2016-06-30 | 2022-08-02 | Black & Decker, Inc. | Dry-fire bypass for a fastening tool |
| US11279013B2 (en) | 2016-06-30 | 2022-03-22 | Black & Decker, Inc. | Driver rebound plate for a fastening tool |
| US10987790B2 (en) | 2016-06-30 | 2021-04-27 | Black & Decker Inc. | Cordless concrete nailer with improved power take-off mechanism |
| US10926385B2 (en) | 2017-02-24 | 2021-02-23 | Black & Decker, Inc. | Contact trip having magnetic filter |
| HUE049071T2 (en) * | 2017-08-24 | 2020-08-28 | Scheppach Fabrikation Holzbearbeitungsmaschinen Gmbh | Electric hammer |
| CN214723936U (en) * | 2018-01-26 | 2021-11-16 | 米沃奇电动工具公司 | Impact tool |
| US11274400B2 (en) * | 2018-07-25 | 2022-03-15 | Robel Bahnbaumaschinen Gmbh | Nail punching machine for driving in or pulling out rail spikes of a rail track |
| EP3733352A1 (en) * | 2019-04-29 | 2020-11-04 | Hilti Aktiengesellschaft | Protective device for a tool and system comprising a protective device and a tool |
| US11858103B1 (en) | 2020-08-20 | 2024-01-02 | Dylan Myers | Clamping grip for hydraulic tamper |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2430817A (en) * | 1945-12-05 | 1947-11-11 | Jackson Corwill | Electric motor-driven tool |
| GB1152119A (en) * | 1966-11-29 | 1969-05-14 | Atlas Copco Ab | Improvements in Recoil Vibration Damped Percussive Machine |
| US3990523A (en) * | 1975-03-17 | 1976-11-09 | Schramm Buford J | Piston engine powered rotary drive with mount and fuel container |
| JPS54127080A (en) * | 1978-03-25 | 1979-10-02 | Makoto Nandate | Vibration isolation device in handle of machine in which vibration is formed |
| SE443940B (en) * | 1982-09-22 | 1986-03-17 | Atlas Copco Ab | SHIPPING TOOL DRIVEN BY REPLACEABLE ENGINE PART |
| US4912848A (en) * | 1989-01-09 | 1990-04-03 | Textron, Inc. | Power tool handle |
| SE468837B (en) * | 1991-07-12 | 1993-03-29 | Anders Svensson | HAALLARE |
| JP3177535B2 (en) * | 1992-03-16 | 2001-06-18 | 日本ニューマチック工業株式会社 | Support device for impact moving tools |
-
1996
- 1996-07-04 CA CA002226777A patent/CA2226777C/en not_active Expired - Lifetime
- 1996-07-04 EP EP96923163A patent/EP0837757B1/en not_active Expired - Lifetime
- 1996-07-04 WO PCT/SE1996/000914 patent/WO1997002930A1/en active IP Right Grant
- 1996-07-04 US US08/983,236 patent/US6112831A/en not_active Expired - Lifetime
- 1996-07-04 JP JP50575097A patent/JP4044960B2/en not_active Expired - Lifetime
- 1996-07-04 DE DE69616059T patent/DE69616059T2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| WO1997002930A1 (en) | 1997-01-30 |
| DE69616059T2 (en) | 2002-06-27 |
| DE69616059D1 (en) | 2001-11-22 |
| EP0837757A1 (en) | 1998-04-29 |
| US6112831A (en) | 2000-09-05 |
| CA2226777A1 (en) | 1997-01-30 |
| JPH11511077A (en) | 1999-09-28 |
| EP0837757B1 (en) | 2001-10-17 |
| JP4044960B2 (en) | 2008-02-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2226777C (en) | Handle means for percussive hand held machines | |
| US5570512A (en) | Grip arrangement for a chain saw | |
| EP1991397B1 (en) | Hammer drill with a handle damping system | |
| US3728793A (en) | Chain saw with damping means | |
| US7287601B2 (en) | Power tool with a rotating and/or hammering drive mechanism | |
| EP0837756B1 (en) | Vibration-damped machine driven tool | |
| US20090283282A1 (en) | Electric hand-held power tool appliance | |
| US3849883A (en) | Chain saw | |
| WO1993001028A1 (en) | Holding device | |
| US20130091715A1 (en) | Handheld work apparatus having a guard | |
| US20030175078A1 (en) | Vibration isolation for a percussion rammer | |
| JP7287981B2 (en) | Impact wrench for tightening and loosening track nuts and screws | |
| US3772784A (en) | Holding arrangement for motor saws | |
| WO2007069946A1 (en) | Handheld working machine | |
| CA3160841A1 (en) | Hand-held tamping machine for compacting track ballast | |
| US20050207842A1 (en) | Vibratory damped guide lever for a working device | |
| SE507185C2 (en) | Handle for hand held percussion breaker hammer | |
| JP2021083361A (en) | Work machine | |
| US20110126391A1 (en) | Hand tool for guiding workpiece during floor installation | |
| SE507186C2 (en) | Handle for hand held percussion breaker hammer | |
| CN213729909U (en) | AC pulse electric welding machine capable of automatically adjusting voltage | |
| WO2022194565A1 (en) | A power tool | |
| CN201711953U (en) | Impact type crushing pickaxe swing vibration-damping handlebar | |
| US9050714B2 (en) | Hand-held demolition tool | |
| NO146047B (en) | DEVICE FOR BATTLE, SHOCK OR TURNING MOVEMENT ENGINE DRIVING TOOLS |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20160704 |