Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3654686 A
Publication typeGrant
Publication dateApr 11, 1972
Filing dateDec 8, 1969
Priority dateDec 8, 1969
Publication numberUS 3654686 A, US 3654686A, US-A-3654686, US3654686 A, US3654686A
InventorsWalter L Diffenderfer, Frederick R Mcfarland
Original AssigneeK D Mfg Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Clamping tool
US 3654686 A
Abstract
A tool is provided, that is adapted to be engaged in the hand of the user, and which has a depressable portion, which actuates jaws adapted for internal engagement of a member. The tool is particularly useful for reaching into automobile engines and the like, and working loose and removing valve tappets, and then lifting the tappets up through the engine, with the jaws or grips of the tool in engagement internally of the tappets.
Images(2)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent McFarland et al.

[151 3,654,686 [451 Apr. 11, 1972 [54] CLAMPING TOOL [72] Inventors: Frederick R. McFarland; Walter L. Diffenderfer, both of Lancaster, Pa.

{73] Assignee: K-D Manufacturing Company, Lancaster,

[22] Filed: Dec. 8, 1969 [21] Appl. No.: 883,212

[52] U.S. Cl ..29/280, 294/19, 29/282 [51] Int. Cl. ..B25b 27/14, A47b 13/06 [58] Field of Search ..29/272, 278, 280, 282; 294/19, 294/29, 31, 93-95; 269/47, 48.1, 233, 157; 81/72 [56] References Cited UNITED STATES PATENTS 1,851,116 3/1932 Spiro ..294/95 2,575,561 11/1951 Payne ..294/19 3,084,893 4/1963 Ruth ...269/233 X 2,623,489 12/1952 Wester Primary Examiner-Andrew R. Juhasz Assistant Examiner-Leon Gilden Attorney-Paul & Paul ABSTRACT A tool is provided, that is adapted to be engaged in the hand of the user, and which has a depressable portion, which actuates jaws adapted for internal engagement of a member. The tool is particularly useful for reaching into automobile engines and the like, and working loose and removing valve tappets, and then lifting the tappets up through the engine, with the jaws or grips of the tool in engagement internally of the tappets.

4 Claims, 4 Drawing Figures PATENTEDAPR 11 I972 SHEET 1 [IF 2 INVENTORS Frederick R. McFarland BY Wolrer L. Diffenderfer Wv M ATTORNEYS.

CLAMPING TOOL BACKGROUND OF THE INVENTION In many industries, particularly in the automotive industry, it periodically becomes necessary to disassemble engines. In the course of such disassembly, it is often desirable to remove hydraulic valve lifters, or hydraulic tappets, in that such often become covered with varnish or foreign material and tend to stick or become secured within their receiving bores, and in such a manner that the cams that are adapted to lift the valves cannot do so in the intended manner. Thus, if the tappet is prevented by means of varnish or other foreign material from moving throughout its full stroke, the valve rods that are driven by the tappets also fail to traverse their full stroke, and accordingly the valve opening and closing does not function in the intended manner. The result is generally engine malfunctron.

Because of the location of valve lifters and tappets, their removal has in the past been an expensive and time consuming job. With increased labor costs, in many instances removal for cleaning and replacement purposes of lifters and tappets has been economically prohibitive.

Some tools have been developed that have been effective to a very limited degree in assisting the removal of valve lifters and tappets, but for the most part, such tools have not functioned in such a manner as to provide sufficient gripping capabilities when operated from an area remote with respect to the engine, in that it has been necessary to insert such tools into the engine for gripping of the tappets at a location substantially removed from the point at which force is applied to the tool. Also, besides the generally limited overall tool design of prior art devices, generally they require both hands for actuation, thereby limiting the freedom and working conditions of the mechanic.

SUMMARY OF THE INVENTION The present invention is directed toward providing a tool that may be used by a mechanic, for the purpose of loosening and removing valve lifters and tappets from an engine, with the tool being adapted for insertion into the engine with or without removal of the manifold, and with the tool further being adapted for use and operation by one hand of the mechanic, but yet being adapted to exert sufficient forces on the components being removed for loosening of the same. Also, the tool is generally elongated for access to the components being removed.

Accordingly, it is a primary object of this invention to provide an elongated tool that is adapted to exert sufficient pressures for removal of machine components by gripping the same internally and exerting sufficient pressure thereon for ease of removal.

It is a further object of this invention to provide a tool of the type described immediately above, which may be applied for removal of valve lifters and tappets, and which may be utilized by a single hand of a mechanic or the like.

It is a further object of this invention to provide a tool utilizing a spring-biased camming mechanism for exertion of sufficient forces to firmly grip components desired to be loosened and/or removed.

Other objects and advantages of the present invention will be readily apparent to one skilled in the art from a reading of the following brief description of the drawing figures, the detailed description of the preferred embodiment, and the appended claims. While the removal of valve lifters and tappets is demonstrated throughout this application as being a preferred use of the invention described herein, it will be recognized that this invention will have utility in other environments also, wherein similar types of removal difficulties are presented, to which the tool of this invention is readily adapted.

IN THE DRAWINGS FIG. 1 is a top perspective view of the tool of this invention, being illustrated in a manner in which the same is used to reach into an engine, to engage and remove a tappet therefrom, with portions of an engine being illustrated broken away in phantom, for presentation of the manner of use of the tool of this invention.

FIG. 2 is a side elevational view of the tool of this invention, with the grip and clamping portions thereof being illustrated in both full lines and phantom positions, for illustrations of both relaxed and clamping positions of the tool, respectively.

FIG. 3 is an enlarged fragmentary longitudinal sectional view of the tool of this invention, taken generally along the line IIIIII of FIG. 2, and wherein the sliding arrangements of the various components are more clearly illustrated.

FIG. 4 is an enlarged fragmentary sectional view of a portion of the tool of this invention, taken generally along the line IV-IV of FIG. 3, and wherein the clamping engagement of the clamping elements of the tool of this invention is clearly illustrated, in the released and clamping positions of the elements illustrated respectively in full line and phantom positions, and wherein a portion of a valve tappet is illustrated in phantom, for the purpose of setting the environment of the tool of this invention.

Referring now to the drawings in detail, reference is first made to FIG. 1, wherein there is illustrated the tool of this invention, generally designated by the numeral 10. The tool 10 includes a first longitudinal arm or member 11 and a second longitudinal arm or member 12, disposed against one another, and slidable relative to each other in accordance with the operation of the tool 10. The member 11 includes a slotted hole 13 at an upper-most end thereof, as viewed in FIG. 3, with the rivet 14 also passing through a hole 15 in the uppermost end of the member 12, in connecting relation, with the rivet 14 also passing through appropriate holes 16 and 17, respectively, in opposite sides 18 and 20, respectively, of a finger grip 21.

A palm-engaging knob 22 is provided, in press-fit relation, or otherwise suitably adhered or secured to the upper-most end of the member 11.

The opposite sides 18 and 20 of the grip 21 have laterally offset portions 23, 24, 25 and 26, which are brought together as illustrated in FIG. 1, and are welded or otherwise secured together, as at 27 and 28, by means of spot welds or the like, with adjacent pairs 23, 24, and 25, 26 of the laterally off-set portions forming finger-gripping ears on opposite sides of the tool 10 for manual engagement by the hand of a user.

Another rivet 30 is secured at the lower-most ends of the grip members 18 and 20, also passing through a slotted hole 31 in the member 11, and through a generally circular hole 32 in the member 12, in a manner generally similar to the arrangement described above for the rivet 14, such that, the grip 21 is securely held for sliding engagement relative to the member 11, and for, upon engagement by the fingers of a user, facilitating the sliding engagement of the arm or member 12, relative to the member 11, an amount determined by the length of the slotted holes 13 and 31.

A helical wound spring 33 is provided, with its lower end as viewed in FIG. 1, bottomed on the upper edges of the grip sides 18 and 20, and with its upper end in engagement against a shoulder 34 of the knob 22.

The lower-most ends of the members 11 and 12, are off-set from each other, to define a recess 35 therebetween, as viewed in FIGS. 1 and 3. A rivet 36, or like connecting member extends through a hole 37 in the member 11, passes across the recess 35, and extends through a slotted hole 38 in the off-set portion of the member 12, being secured in a suitable manner in such disposition by a washer 40, or the like, for sliding engagement of the member 12 relative to the rivet 36, when the member 12 is moved longitudinally in the direction of the arrow 41, relative to the member 11.

Another rivet or like connecting member 42, is provided at the lower-most end of the arm or member 12, passing through a circular hole or the like 43 therein, across the recess 35, and being connected with a suitable washer 44, through a slotted hole 45 in the member 11, for secure connection of the rivet 42 to the lower-most end of the member 12, and for sliding engagement of the rivet 42 within the slotted hole 45 of the member 11.

Thus, the rivet 37 is fixed relative to the first longitudinal member 11, but the rivet 42 is slidable relative to the longitudinal member 11.

A pair of clamping elements 46 and 47 are disposed within the recess 35, these elements 46 and 47 being substantially identical in construction. Both members 46 and 47 are pivotally mounted at their upper-most ends, as viewed in the drawings, to be pivotally rotatable about the rivet 36.

The clamping element 47, is best illustrated in FIG. 4, as including a slotted hole 48, obliquely disposed relative to the longitudinal disposition of the members 11 and 12, and relative to a plane transverse to a general longitudinal disposition of such members 11 and 12, such slotted hole 48 thereby extending at an upwardly directed angle as viewed in FIG. 4, also extending somewhat rightward, as viewed in FIG. 4. The element 47 is also provided with a leftwardly directed lip 50, as viewed in FIG. 4. The rivet 42 passes through the slotted hole 48, in the manner illustrated in FIG. 4.

The element 46 contains a slotted hole 51, through which the rivet 42 also passes. A lip 52 protrudes in a rightward direction at the lower-most end of the element 46, as viewed in FIG. 4.

Upon engagement of the grip 21, and movement of the same upwardly, against the downward biasing action of the resilient spring 33, and upon upward movement of the longitudinal member 12, relative to the member 11, the rivet is also moved upwardly, and becomes a drive member which engages within the slotted holes 48 and 51 of the respective elements 47 and 46 at a location closer to the lips 50 and 52 than to the rivet 36, as illustrated in FIG. 4, and cams the elements 46 and 47 between the full line position illustrated in FIGS. 2 and 4, to the phantom line positions illustrated in FIGS. 2 and 4, such that the lips 52 and 50 of the elements 46 and 47 respectively, are driven laterally outwardly, away from each other, as the elements 46 and 47 are caused by the cam-like action of the rivet 42 within the camming slots 47 and 51 to pivot the elements 46 and 47 about the rivet 36.

As the elements 46 and 47 are pivoted outwardly, the lips 52 and 50, respectively thereof, are adapted to internally engage a member, such as the valve tappet 55, by clampingly engaging at opposite side portions of a blind bore or the like 56 thereof, as viewed in FIGS. 1 and 4 and thus accomplish the force-applying objective set forth in the objects above.

The tool 10 of this invention may thus be inserted into an engine 57 or the like, through a valve rod opening 58, for removal of valve tappets 55, with or without removal of the engine manifold as desired. In this manner, by spreading the elements 46 and 47 of the tool, under pressure applied by the hand of a mechanic or the like with his fingers engaging the grip 21 and with his palm over the knob 22, the desired pressure may be applied through the element lips 52 and 50, for twisting the tappets 55 backwardly and forwardly, with a rotary motion, or by pulling the same upwardly and downwardly to loosen the tappets 55 for removal of the same.

It will be apparent from the foregoing, that various modifications may be made in the details of construction, as well as in the areas of use of the tool 10 of this invention, all within the spirit and scope of the invention as recited in the appended claims.

We claim:

1. A tool for internally engaging machine elements and the like in clamping relation from a location remote from the location of toolactuation, comprising a first longitudinal elongated member, a second longitudinal elongated member disposed for longitudinal movement relative to said first member, manual gripping means on said second member for manual engagement for facilitating its longitudinal movement, connecting means carried by said first member, two clamping elements, each mounted for pivotally sliding on said connecting means, lips on said each of said clamping elements, and cam means on each of said elements, cam drive means carried by said second member at a location remote from said manual gripping means and located closer to said lips than to said connecting means to provide means for maximizing forces applied through said clamping element lips for engaging said cam means and driving said elements pivotally relative to each other, with their respective lips laterally away from each other, wherein said first and second members are spaced apart relative to each other at their ends closest to said clamping elements, with said clamping elements being disposed in sandwiched relation therebetween.

2. The tool of claim 1, wherein said cam means comprise slotted holes disposed obliquely relative to the longitudinal disposition of said members and relative to the lateral direction of movement of said lips, and wherein said drive means comprises a pin means carried by said second member and disposed through each of said slotted holes.

3. The tool of claim 1, wherein said gripping means is spring-biased toward said elements by a spring and is movable in opposition to said spring for relative lateral outward movement of said clamping means to article-engaging position.

4. The tool of claim 1, wherein a palm-engaging knob is disposed on an end of said first member remote from from said clamping means.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1851116 *May 18, 1931Mar 29, 1932Spiro Walter JPiston handling implement
US2575561 *Mar 14, 1946Nov 20, 1951Payne ClaudePickup implement
US2623489 *Mar 16, 1948Dec 30, 1952Western Electric CoApparatus for holding container parts for assembly
US3084893 *Mar 30, 1961Apr 9, 1963Symons Mfg CoQuick-release temporary articulated i-beam hanger
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3863976 *Feb 12, 1973Feb 4, 1975Westinghouse Electric CorpRemotely operable explosive plug insertion tool
US4377956 *Jul 22, 1980Mar 29, 1983Dennis CooperPipe extractor tool
US4944081 *Jun 15, 1989Jul 31, 1990Mobil Oil CorporationPacking removal tool
US5107882 *Jul 26, 1991Apr 28, 1992John M. HefnerValve assembly with removable packing
US5127145 *May 29, 1990Jul 7, 1992Mobil Oil CorporationProcess for removing packing
US5593197 *Mar 13, 1995Jan 14, 1997Mac Tools, Inc.Spark plug wire puller
US5671520 *Feb 21, 1995Sep 30, 1997Patent Consultants & Services, Inc.For a fluid conduit line
US5857723 *Apr 23, 1997Jan 12, 1999Stanley Mechanics Tools, Inc.Hand tool for gripping objects
US5862577 *Feb 19, 1997Jan 26, 1999Dana CorporationSnap ring installation tool
US7289590May 27, 2005Oct 30, 2007Framatome AnpMethod and apparatus for handling a tube guide of upper interval equipment of a nuclear reactor
US8201865 *Dec 30, 2009Jun 19, 2012Hoopman Timothy LPipe gripper device for pulling pipe and methods of use
US20100202837 *Dec 30, 2009Aug 12, 2010Hoopman Timothy LPipe gripper device for pulling pipe and methods of use
US20100251957 *Feb 26, 2008Oct 7, 2010Asb Manufacturing Inc.Making pylons and apparatus for handling
US20120272759 *Mar 30, 2010Nov 1, 2012Won Tae KimDevice and method for converting circular motion
WO1993003300A1 *Jul 23, 1992Feb 18, 1993James L CarrollValve assembly with removable packing
Classifications
U.S. Classification29/280, 29/282, 269/48.1, 294/94, 294/97
International ClassificationB25B27/24, B25B27/06, B25B27/02
Cooperative ClassificationB25B27/24, B25B27/02, B25B27/06
European ClassificationB25B27/06, B25B27/02, B25B27/24
Legal Events
DateCodeEventDescription
Jun 28, 1990ASAssignment
Owner name: EASCO HAND TOOLS, INC., MARYLAND
Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BANCBOSTON FINANCIAL COMPANY,;REEL/FRAME:005383/0121
Effective date: 19900626
Nov 7, 1988ASAssignment
Owner name: BANCBOSTON FINANCIAL COMPANY,, MASSACHUSETTS
Owner name: FIRST NATIONAL BANK OF BOSTON, THE, MASSACHUSETTS
Free format text: SECURITY INTEREST;ASSIGNOR:EASCO HAND TOOLS, INC.;REEL/FRAME:005094/0513
Effective date: 19881031
Nov 4, 1987ASAssignment
Owner name: EASCO HAND TOOLS, INC.
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. NUMC PRO TUNC;ASSIGNOR:K.D. MANUFACTURING CO., BY: WAYNE M. MYERS;REEL/FRAME:004818/0194
Effective date: 19871102
Jul 16, 1987ASAssignment
Owner name: BANCBOSTON FINANCIAL COMPANY
Free format text: SECURITY INTEREST;ASSIGNOR:EASCO HAND TOOLS, INC.;REEL/FRAME:004740/0674
Effective date: 19870522
Jul 16, 1987AS06Security interest
Owner name: BANCBOSTON FINANCIAL COMPANY
Effective date: 19870522
Owner name: EASCO HAND TOOLS, INC.
Jul 8, 1987ASAssignment
Owner name: BANCBOSTON FINANCIAL COMPANY, A MASSACHUSETTS BUSI
Free format text: SECURITY INTEREST;ASSIGNOR:EASCO HAND TOOLS, INC., A CORP. OF DE.;REEL/FRAME:004749/0135
Effective date: 19870702
Owner name: FIRST NATIONAL BANK OF BOSTON, THE
Oct 29, 1986ASAssignment
Owner name: BANCBOSTON FINANCIAL COMPANY, 100 FEDERAL STREET,
Free format text: SECURITY INTEREST;ASSIGNOR:EASCO HAND TOOLS, INC. A MA CORP;REEL/FRAME:004641/0855
Effective date: 19860812
Owner name: FIRST NATIONAL BANK OF BOSTON THE, 100 FEDERAL STR
Owner name: BANCBOSTON FINANCIAL COMPANY,MASSACHUSETTS
Owner name: FIRST NATIONAL BANK OF BOSTON THE,MASSACHUSETTS
Free format text: SECURITY INTEREST;ASSIGNOR:EASCO HAND TOOLS, INC. A MA CORP;REEL/FRAME:4641/855
Owner name: BANCBOSTON FINANCIAL COMPANY, MASSACHUSETTS
Owner name: FIRST NATIONAL BANK OF BOSTON THE, MASSACHUSETTS
Jul 2, 1986ASAssignment
Owner name: FIRST NATIONAL BANK OF BOSTON
Free format text: SECURITY INTEREST;ASSIGNOR:EASCO CORPORATION;REEL/FRAME:004572/0975
Effective date: 19860626
Jul 15, 1982ASAssignment
Owner name: K-D MANUFACTURING COMPANY,
Free format text: RELEASED BY SECURED PARTY;ASSIGNORS:HAMILTON BANK;MORGAN GUARANTY TRUST COMPANY OF NEW YORK;COMMONWEALTH NATIONAL BANK, THE;REEL/FRAME:004059/0136
Effective date: 19820128
Owner name: K-D MANUFACTURING COMPANY, PENNSYLVANIA
Jul 15, 1982AS17Release by secured party
Owner name: COMMONWEALTH NATION
Owner name: HAMILTON BANK
Owner name: K-D MANUFACTURING COMPANY,
Effective date: 19820128
Owner name: MORGAN GUARANTY TRUST COMPANY OF NEW YORK
Aug 3, 1981AS08Conditional assignment
Free format text: HAMILTON BANK, MORGAN GUARANTY TRUST COMPANY OF NEW YORK, 23 WALL ST., NEW YORK, * K-D MANUFACTURING COMPANY, A PA CORP. : 19810407
Aug 3, 1981ASAssignment
Owner name: COMMONWEALTH NATIONAL BANK, P.O. BOX 1010, HARRISB
Free format text: CONDITIONAL ASSIGNMENT;ASSIGNOR:K-D MANUFACTURING COMPANY, A PA CORP.;REEL/FRAME:003885/0768
Effective date: 19810407
Owner name: HAMILTON BANK, MORGAN GUARANTY TRUST COMPANY OF NE