|Publication number||US3750991 A|
|Publication date||Aug 7, 1973|
|Filing date||May 5, 1971|
|Priority date||May 5, 1971|
|Also published as||CA975342A, CA975342A1, DE2217638A1|
|Publication number||US 3750991 A, US 3750991A, US-A-3750991, US3750991 A, US3750991A|
|Original Assignee||Ragir M|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Referenced by (41), Classifications (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
[ 1 Aug. 7, 1973 I SUCTION MOUNTING DEVICE  Inventor: Meyer J. Ragir, 1375 Sheridan Rd., Highland Park, Ill.
 Filed: May 5, 1971  Appl. No.: 140,386
52 us. Cl 248/206 R [5 1] Int. Cl.. F1611 47/00 ' Field 01 Search 248/206 R, 467
l 56] References Cited UNITED STATES PATENTS 2,l3l,224 9/1938 Kaach 248/206 R FOREIGN PATENTS OR APPLICATIONS 432,498 7/1935 Great Britain 248/206 R 1,915,483 5/1969 Germany 248/206 R 1.569052 4/1969 France 248/206 R 441,647 1/1968 Switzerland 248/206 R lUlIIlllllll Primary Examiner-William H. Schultz Alt0rney-Dressler, Goldsmith, Clement & Gordon  ABSTRACT A suction device including an elastic diaphragm and a camming lever pivoted on pins carried by a stem extending from the diaphragm with a reaction member interposed between the diaphragm andthe lever. The pins are formed integral with the stem and the lever has a pair of arms located on opposite sides of the stem with the arms having L-shaped slots for receiving the pins. The lever also has a projection extending from an intermediate portion and the projection is in contacting engagement with an intermediate portion of the reaction member when the suction device is supported on a wall. In another embodiment, the reaction member also has a recess for receiving the projection to prevent relative movement between the lever and the reaction member when the device is attached to a flat surface.
14 Claims, 12 Drawing Figures BACKGROUND OF THE INVENTION The present invention relates generally to mounting devices and more particularly to an improved suction mounting device for attaching articles to a flat surface.
The use of suction devices for attachment of various articles to a flat surface without marring the surface has been known for years. One specific type of unit that has previously been commercialized includes a suction device for attachment of a hook to a wall of a building. Such a device is generally disclosed in U. S. Pat. No. 355,021. A unit of this type is still being commercialized in a slightly modified form.
In recent years, efforts have been made to produce a minimum amount of projection of the hook from the wall when it is in its assembled condition. Thus, it has been proposed to change the configuration of the hook structure of the above mentioned patent in a manner that an intermediate portion of the hook is in close proximity or, in most instances, in contact with the supporting wall.
However, it has been found that both types of hooks discussed above, have a disadvantage in that the holding power of the suction device is decreased as additional weight of load is beingapplied to the hook.
SUMMARY OF THE INVENTION The present invention contemplates an improved suction-type device for supporting articles on a wall and in which the holding power remains substantially the same under all conditions of actual use.
The suction device of the present invention includes an elastic diaphragm having an elongated stem or pin projecting from one surface thereof with a lever pivoted on a free end of the stem. A reaction member is interposed between the diaphragm and the lever and has an opening adjacent the central portion with the stem extending through the opening. An annular peripheral flange of the reaction member engages teh diaphragm near the periphery thereof and cooperating camming surfaces on the lever and the central portion of the reaction member will cause the central portion of the diaphragm to be drawn into engagement or in close proximity with the central portion of the reaction member as the lever is pivoted from an inoperative to an operative position. The lever has a projection at a location spaced from the pivot point for engaging the reaction member between the central portion and the flange and acts as a fulcrum for reaction forces when the lever is in an operative position and an article is supported on the free end.
In oneembodiment, the suction device has the lever configured to define a hook for supporting an article while in an "alternate embodiment, the article supporting means isin theform of a groove or slot for receiving a cooperating interlocking element.
In one form of the invention, the suction device further has means which define a recess on the intermediate portion of the reaction member which receives the projection and prevents any relative rotational movement of the leverabout the axis of the elongatedstem. In addition, the pins defining the pivot axis for the lever are integral with the. stern and the lever 883111150X? tending on opposite sides of the stem with the arms any special equipment after the reaction member and diaphragm have been assembled.
BRIEF DESCRIPTION OF SEVERAL VIEWS OF DRAWINGS -FIG. I shows a plan view of a suction device constructed in accordance with the present invention and attached to a wall;
FIG. 2 is a side elevation of the suction device shown in FIG. 1;
FIG. 3 is a sectional view 3-3 of FIG. 1;
FIG. 4 is a view similar to FIG. 1 showing a slightly modified form of the present invention;
FIG. 5a is a side elevation view of the suction device shown in FIG. 4 and shown partially in section;
FIG. 5b shows an article to be supported on the suction device;
FIG. 6 is a sectional view taken generally along line 6-6 of FIG. 511;
FIG. 7 is an exploded perspective view of the diaphragm and reaction member showing another form of the invention;
FIG. 8 is a view similar to FIG. 5 showing the device of FIG. 7 in its operative position;
FIG. 9 is a plan view of two suction devices used to support a towel rack;
taken generally along line FlGflOis a fragmentary view along line l0-l0 of FIG. 9; and
FIG. 11 is a fragmentary view along line 11-11 of FIG. l0.
DETAILED DESCRIPTION While this invention is susceptible of embodiment in many different forms,'there is shown in the drawings and will herein be described in detail several specific embodiments, with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to the embodiments illustrated.
FIG. 1 of the drawings generally shows a suction de vice, generally designated by the reference numeral I0, for supporting articles on a flat surface, such as a wall 12. The construction of the suction device is more clearly shown in the cross sectional view of FIG. 3 and includes an elastic diaphragm 14 which is substantially circular and has a stem or pin I6 connected thereto. The connection between the stem and diaphragm includes an aperture disc 18 integral with the stern and molded into a thickened central portion 20 of the diaphragm. Thus, the diaphragm l4 and stem 16 are constructed as a one-piece unit and the stem 16 projects from one surface of the diaphragm.
The suction device also includes a lever 22 having a bifurcated portion 24 on one end thereof which receives the free end of the stem 16 and is pivoted on the stern by a pin 26.
The suction device 10 further includes a reaction member, generally designated by the reference numeral 30,'that encloses the elastic diaphragm l4 and cooperates with the diaphragm and the lever to pro duce and maintain an effective vacuum-seal when the suction device is attached to the flat surface or wall 12. v
having L-shaped slots to receive the pins so that the stem and lever can readily be interconnected without The reaction member 30 includes a'planar, circular, central portion 32, an intermediate portion 34, which is a conical segment that slopes away from the free end of the pin, and an annular peripheral flange 36 that extends substantially readially of the longitudinal axis of the stem. The free end of the peripheral flange has an axially extending portion 38 that cooperates with the radial portion 36 to define a recess along the periphery of the reaction member and the recess has a depth substantially equal to the thickness of the peripheral portion of the elastic diaphragm 14, for a purpose to be described later. In addition, the lower surface of the flange 36 that is adjacent the elastic diaphragm, has a pair of circumferentially extending beads 40, the purpose of which will be described later.
The substantially flat surface on the central portion 32 defines a camming surface on the reaction member that cooperates with a second camming surface defined by a pair of ears 42 that repsectively extend from the free ends of the arms defined by the bifurcated portion 24 of the lever 22.
According to the primary aspect of the present invention, the lever 22 has a projection 44 extending from an intermediate portion thereof and defining means for engaging the reaction member between the central portion 32 and the peripheral flange 36. The projection 44 has an elongated surface 46 that is in extended engagement with the outer surface of the intermediate portion 34.
Before describing the advantages of the projection 44, a description of the remainder of the suction device appears to be in order. In the embodiment illustrated in FIGS. 1-3, the lever 22 has an angularly related end portion 50 adjacent the free end thereof that is spaced from the pivot pin 26 and the endportion 50 is curved or bent to define a hook for supporting an article and the hook portion or surface 52 adjacent the wall surface is spaced from the wall when the device is in its operative position.
ln mounting the device 10 upon the wall 12, the lever 22 is initially pivoted to a position substantially 90 from the position shown in FIGS. 1-3. In this position, the dimension between the edge 60 of the lever and the central portion 32 is sufficient to allow the elastic diaphragm or suction cup to be preliminarily attached to the wall by forcing the entire unit against the surface of the wall. Thereafter, the lever is pivoted from its first or inoperative position (not shown) to the second or operative position shown in the drawings and the cooperating camming surfaces on the cars 42 and the central portion 32 will cause the central portion of the clastic diaphragm to be drawn towards the central portion of the reaction member 30 to create a large vacuum space 62 .(FIG. 3). While the elastic diaphragm is drawn into substantially the configuration of the reaction member 30, the annular flange 36 will maintain the periphery ,of the elastic-diaphragm in sealing contact with the wall surface. The circumferential beads 40 on the lower surface of the annular flange 36 will insure that the periphery of the elastic diaphragm I4 is maintained in sealing engagement with the wall surface.
When the device is attached to the wall, the suction device of the present invention overcomes the tendency for the weight of the aritcle to pull the elastic diaphragm or suction cup 14 from sealing engagement with'the wall surface. This is accomplished by the projection 44 engaging an intermediate portion fo the reaction member between the central portion 32 and the peripheral flange 36. The engaging surface 46 of the projection 44 will act as a fulcrum for any forces resulting from the weight of articles supported on the free end of the lever or. the hook 50 and will tend to force the lower portion of the reaction member and the suctioncup into further contacting engagement with the surface wall. This will substantially overcome the tendency for the weight of the article to pull the suction device from the wall surface.
It will be appreciated that in either of the prior art types of units discussed above, the weight of the article will tend to produce pivotal forces that will pull the suction device from the wall surface. Thus, if the hook portion 52 adjacent the surface wall were in engagement with the wall, this engaging surface would be the fulcrum for any weight applied to the free end of the hook. The weight of articles on the hook would tend to produce a pivotal force about the fulcrum 52 and the extended moment arm defined by the dimension between the pivot axis 26 and the engaging portion 52 of the hook and the wall would tend to decrease the holding power as the load on the free end of the hook is increased. Also, if the hook portion 52 were to remain spaced from the wall surface, the fulcrum for any weight applied to the free end of the hook would be outside the periphery of the diaphragm, along the edge of the peripheral flange 36 of the reaction member 30 that is closest to the free end of, the hook. Again, this arrangement would not in any way overcome the tendency for the holding power to decrease as the weight of the articles supported by the devices increases, since the fulcrum would be outside the periphery of the elastic diaphragm. x I
Summarizing briefly, the arrangement of the present invention considerably decreases the effective moment arm for the reaction forces resulting from the weight of articles on the device. In addition, having the fulcrum inside the periphery of the elastic diaphragm and spaced from the axis of the stem will result in increased holding power on at least a portion of the diaphragm as the weight on the hook is increased.
According to another aspect of the present invention, the hook end portion of the lever 22 is tapered in a manner that the free end thereof has a minimum cross sectional configuragtion (FIG. 1) and progressively increases from this minimum dimension. This arrangement allows for a support of articles having extremely small holes' for receiving the end of the hook. Heretofore, it has been common to provide a bulb on the free end of the hook thereby requiring a large opening in the article sufficient in size to receive the bulbous end portion.
A slightly modified embodiment of the invention is disclosed in FIGS. 4-6. Since many of the elements are identical in construction, the reference numerals have been repeated with the suffix "a" being added to each of the reference numerals. The modified embodiment of the invention incorporates an additional feature that allows for the attachment of articles without producing any twisting action on the lever portion of the device.
Thus, in the modified embodiment, the intermediate, conical portion 340 has a pair of fins integral therewith and extending outwardly therefrom. The fins 100 cooperate to define a recess or slot 102 that receives the projection 44a. The transverse dimension of the recess 102 is substantially equal to the transverse dimension of the projection 44a and defines means for preventing rotational movement of the lever about the axis of the stem 16a. I
.The modified embodiment of the present invention also includes a modified form of article support means on the free end of the lever. Thus, the article support portion 50a on the: lever 220 has an enlarged flat sur- 7 face 108 which has a projecting portion 110 extending jection 114 define a tongue and groove connection between t he article support and the lever.
The modified embodiment of the present invention is attached to the wall in a manner similar to that described in connection with FIGS. 1-3. However, in the modified embodiment, the additional fins 100 will prevent any twisting or relative rotational movement of the stem and the lever about the axis of the stem ifa torque force were applied to the free end of the lever. Thus, for example, if the suction cup device were to be utilized as a support for a soap dish or a towel rack, any
twisting forces applied to the free end of the lever I would prevent the entire unit from being rotated about the stem. I
A further modified form of the present invention is shown in FIGS. 7 and 8 wherein the article support portion on the end of the lever is similar to that shown in the embodiment of FIGS. 5 and 6. In the embodiment illustrated in FIGS. 7 and 8, the free end of the stem, the opening in thereaction member and the pivoted end of the lever are modified to eliminate one molding operation and also one step in the assembly of the article support.
In the embodiment illustrated in FIGS. 7 and 8, the diaphragm 14b is similar to the diaphragm 14 described above while the stem 16b has been modified tohave the.
pivot pin formed integral therewith. As seen in FIG. 7, the stem 16b, which is substantially rectangular in cross sectional configuration has a pair of pins 130 extending from opposite sides of the stem. The pair of integral circular pins 130 are located adjacent the free end of the stem 16b and are located'on a common transverse axis extending perpendicular to the axisofthe stem. In addition, the stem has first and second rectangular portions I32 and I34 interconnected by a reduced circular portion 136 located below the pins 130. The rectangular portions l32and 134 are substantially identical in cross section, and have their major dimensions located perpendicular toeach other, for a purpose which will be described later.
In the embodimentof FIGS. 7 and 8, the reaction member 3011. has an opening which consistsof a substantially rectangular central portion I40 and elongated slots I42 extending from opposed edges of the rectangular portion. The elongated dimension between opposed ends of the slots 142 is equal to the dimension between opposite ends of the pins 130 while the 'rectan gular central portion 140. of the opening is equal to the cross sectional configuration of the rectangular portions 132 and 134 of stem 16b.
As more clearly shown in the assembledcondition in FIG. 8, the lever 22b hasa pair of arms (only one being shown) 150 that are adapted to extend along opposite sides of the stem 16b and define the bifurcated portion of the IeverJThe arms 150, which have the ears 42b formed integral therewith, each have a slot 152 extend ing from one edge 154 thereof. The slot (see FIG. 8
has a first portion 152a and a second portion 1521;
which extend substantially perpendicular to'each other or may be termed to be angularly related to each other. Thus, the portions 152a and 152i; cooperate to define a substantially L-shaped slot which has a dimension substantially equal to the diameter of the respective pins 130. i
In assembling the diaphragm, reaction member and lever, the stem 16b is axially inserted through the opening in the reaction member with the pins passing through the slots 142 until the bottom surface of the reaction member engages the top surface of the rectangu lar portion 134 of stem 16b. The reaction member 3012 and diaphragm 14b are then rotated 90 degrees relative to each other to align the elongated dimension of the opening in the reaction member with the elongated dimension of the portion 134 of the stern 16b. This rela tive rotation is accommodated within the circular portion 136 of the stern which has a diameter no greater than the minor dimension of the rectangular portions 132 and 134. Thereafter, the reaction member is moved downwardly below the circular portion 136 and the lever is attached to lhe stem by moving the pins along the firstportions 152a of the slots 152 and then along the perpendicular portions 1521:. Once the pins are located in the position shown in FIG. 8, relative to the slot 152, the first rectangular portion 132 will cooperate with the rectangular portion 140 of the opening in the reaction member tomaintain the devicein its assembled condition while the second rectangular porreaction member. If desired, the intermediate portion 34b of the reaction member 30b may again have the projections [00b formed thereon which cooperate to define a slot for receiving the projection 44b on the leverZZb. The projections l00b extend perpendicular to the. major dimension edges of the rectangular portion 140 of the opening in thcreaction member and parallel to the minor dimension edges.
The advantage of the embodiment illustrated in FIGS. 7 and 8 can briefly" be summarized as eliminating the need for a separate molding operation to form the circularpin 26 since the pins 130. can beformedsimultaneously with the formation of the stern 16b and itsenlarged disc (not shown in FIGS. 7 and 8). In addition, during assembly of the device, it is no longer necessary to axially align the openings in the arms or bifurcated portions of the lever with the opening in thestem and then insert the pin therethrough. After the device is assembled; the rectangular portion I34 on the stem and the rectangular portion I40 of the opening cooperate to accommodate further axial movement while pre venting rotation of the stem in the opening. Also. the
rectangular portion. I32 on the stem cooperates with the rectangular portion I40 of the opening to prevent accidental removal of the stem from the reaction member.
FIGS. 9-ll show a slightly modified form of the lever utilized in connection with the embodiment illustrated in FIG. 8 and also show twosuction devices utilized in connection with supporting an elongated article support, such as a towel rack. In the embodiment illustrated in FIGS. 9 11, the article support is in the form of a recessl fll formed. on the outer end of each of the lovers; 22b with the recesses adapted to receive a towel bar or rod 162. Again, while not necessary to the practice of the invention, the projections 44c extend between the pair of projections or ribs lb that extend from the intermediate portions of the reaction members 30b to increase the lateral stability of the levers when cantilever forces are applied to the bar 162. If desired, the recesses 160 could take the form of openings extending through the circular end portions on the levers 22b so that the bar or rod could extend through the openings, thereby eliminating the need for forming two, or left and right-hand levers 22b. Also, if desired, caps could be utilized to close the ends of the openings to prevent exposure of the ends of the rod.
Thus, it will be seen from the above description that the present invention provides a simple and inexpensive expedient for substantially increasing the holding power of a suction cup device.
What is claimed is:
l. A suction device adapted to be attached to a flat surface comprising:
an elastic diaphragm;
a stem connected to said diaphragm, said stem having a free end spaced from said diaphragm;
a pair of integral pins extending from opposite sides of said stem adjacent to said free end thereof, said pins being located on a common axis extending transversely of the axis of said stem;
a lever pivoted on said free end of said stem;
said lever having a pair of spaced arms extending along said opposite sides of said stem;
each of said arms having. a substantially L-shaped slot extending from an edge thereof for receiving one of said pins to. define a pivot axis for said lever;
a reaction member interposed between said diaphragm and said lever;
said reaction member having an opening in its central portion with said stem extending through said opening and an annular peripheral flange for engagement with said diaphragm near the periphery thereof; and
means defining cooperating camming surfaces respectively on said lever adjacent the pivoted end thereof and on the central portion of said reaction member;
said cooperating camming surfaces of said lever and said reaction member cooperating to draw a central portion of said diaphragm toward the central portion of said reaction member as said lever is pivoted from a first to a second position.
2. A suction device as defined in claim 1 wherein:
said reaction member includes an.intermediate tapered portion extending between said central portion and said peripheral flange; and
including projection means on said lever spaced from the free end of said stem for engaging the surface of said intermediate portion when said lever is in said second position.
3. A suction device as defined in claim 2 wherein:
at least a portion of said lever when in said second position extends beyond the periphery of said annular peripheral flange; and
said lever projection means is operative when engaging the surface of said intermediate portion to maintain said lever portion spaced away from the flat surface to which the suction device is attached.
4. A suction device as defined in claim 2, including means defining a recess on said intermediate portion engageable with said lever projection means for pre venting rotational movement of said lever about the axis of said stem.
5. A suction device as defined in claim 1, wherein at least a portion of said lever includes means defining an article support.
6. A suction device as ,defined in claim 5, wherein said lever support portion defines a hook.
7. A suction device as defined in claim 6, wherein said hook has a minimum cross sectional dimension at the free end thereof. I
8. A suction device as defined in claim 5, wherein said lever support portion includes a separable element, and means defining a tongue and groove connection between said lever support portion and said separable element.
9. A suction device as defined in claim 1 wherein:
the free end of said stern including said pins has a maximum dimension in a direction axially of the axis of said pins and a minimum dimension in a direction transverse to the axis of said pins; and said opening in said reaction member having a maximum dimension corresponding to the maximum dimension of said free end of said stem and has a minimum dimension corresponding to the minimum dimension of said free end of said stem; whereby rotation of said stem relative to said reaction member after passage of said free end of said stem through said opening prevents inadvertent separation of said reaction member and said stem 10. A suction device adapted to be attached to a flat surface comprising:
an elastic diaphragm; a stem connected to said diaphragm; said stem having a free end spaced from said diaphragm and having first and second axially spaced portions; 7
each of said first and second axially spaced portions having a maximum dimension transverse to the axis of said stem and minimum dimension transverse to the axis of said stem, the maximum dimension of said first portion being angularly offset from the maximum dimension of said second portion;
said first and second portions being interconnected by an intermediate portion having a maximum di- 'mension no greater than the minimum dimension of said first and second portions;
a lever pivoted on a free end of said stem;
a reaction member interposed between said diaphragm and said lever;
said reaction member having an annular peripheral flange for engagement with said diaphragm near the periphery thereof and an opening in its central portion adapted to accommodate passage therethrough of said stem;
the configuration of said opening accommodating passage therethrough of said first portion at only a limited number of angular positions of said stem and accommodating passage therethrough of said second portion at only a limited number of different angular positions of said stem;
whereby rotation of said stem after passage through said opening of said first portion permits passage through said opening of said second portion and precludes inadvertent separation of said stem and saidreaction member;
means defining cooperating camming surfaces respectively on said lever adjacent the pivoted end thereof and on the central, portion of said reaction member; 7
said cooperating camming surfaces of said lever and said reaction member cooperating to draw a central portion of said diaphragm toward the central portion of said reaction member when said lever is pivoted from a first to a second position.
11. An article support adapted to be attached to a flat surface comprising:
attaching means including an elastic diaphragm having a stem with a free end of said stem spaced from said diaphragm;
the free end of said stem having a pair of opposed integral pins extending transversely of the axis thereof;
a reaction member having an opening through which said stem extends with said pins spaced above said reaction member;
a lever having a pair of spaced arms extending along opposite sides of said stem, each of said arms having an open ended, slot configured to receive one of said pins andto pivotally retain and support said lever on said stem;
camming means on said arms and a central portion of said reaction member operative to draw a portion of said diaphragm towards said reaction memher when said lever is pivoted to an operative position; and
projection means on said lever for engaging said re action member at a location spaced from said central portion when said lever is in its operative position.
12. An article support as defined in claim 11,
a portion of said lever extends beyond the periphery of said reaction member;
said projection means comprises an integral'projection extending from said lever and having a free edge engaging said reaction member intermediate its central portion and its periphery to space said portion of said lever away from said flat surface; and including means defining a recess on said reaction member for receiving at least a portion of said projection when said lever is in its operative position to prevent relative rotation between said reaction member and said lever about the axis of said stem. 13. An article support as defined in claim I] wherein: the cross sectional configuration of said stem is different at axially spaced locations thereof; whereby rotation of said stern after passage of aportion thereof through said opening is required to permit passage of the remainder of said stem through said opening and inadvertent separation of said stem and said reaction member is precluded. l4. An article support as defined in claim I wherein:
said stern has first and second axially spaced portions of generally rectangular cross section interconnected bya circular portion;
said first and second portions having minor and mojor dimensions thereof being angularly offset with respect to each other;
said integral pins extending from opposed surfaces of said first portion and defining in part the major dimerision thereof;
said opening being generally rectangular and having slots extending from opposed sides thereof to accommodate passage therethro ugh of said pins;
said opening accommodating passage therethrough of said second portion only after rotation of said stem when said circular portion is in said opening after passage therethrough of said first portion;
whereby inadvertent separation of said stem and said reaction member is prevented. v a: t a a
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