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Publication numberUS2436941 A
Publication typeGrant
Publication dateMar 2, 1948
Filing dateMar 28, 1945
Priority dateMar 28, 1945
Publication numberUS 2436941 A, US 2436941A, US-A-2436941, US2436941 A, US2436941A
InventorsSendoykas Jack J
Original AssigneeSendoykas Jack J
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Toggle clamp
US 2436941 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

March 2, 1948. SENDOYKAS 2;436,941

TOGGLE CLAMP Filed March 28, 1945 INVENTOR ATTORNEY Patented Mar. 2,1948

TOGGLE CLAMP Jack J. Sendoykas; Detroit, Mich.

. Application March 28, 1945, SerialNo. 585,348

This invention relates to a. toggle clamp and. A

more particularly to a. clamp for holding .work

while some operation is tobe performed there- 1 on or for temporarily holding two parts together v while work- -is being done.

It is an object of the present invention to provide a clamping device which may be quickly and easily positionedto a-locked or. unlocked position and to provide a toggle joint between a pressure bar and a handle for greatly increasing the pressure applied to the work by the application of a minimum pressure by the operator.

Another object of the invention is to provide A a clamp having a locking bar which travels bodily in an are so that the resultant movement is outwardly and downwardly when the locking bar is brought to a locked position.

Other objects and advantagesof the invention will be more fully understood from the following description taken in connection with the accompanying drawings in which:

Fig. 1 is a side elevational view of my improved device shown in its open position.

Fig. 2 is a view corresponding to Fig. l but showing the device in a closed and locked position.

Fig. 3 is an end view of Fig. 2.

Referring to the drawings, I have shown a base portion formed from oppositely disposed stamplugs having a vertically extending portion l2 and a horizontally extending portion l4. The horizontal portion I 4 isprovided with openings l6 for receiving bolts or screws for attaching the base to a support.

At the opposite ends of the vertical portions, and arranged there between, are links l8 and 20 which are pivotally supported to the base by rivets 22 and 24. The links l8 and20 are substantially of equal length and their outer ends are pivotally secured to a pressure bar 26 by rivets 28 and 30. The link 26 is pivotally supported at one end of the bar 26 and the link i8 is pivotally supported approximately midway between the length of the bar 26, although the distance or length of the locking arm could be a shorter or greater distance from the pivotal point. The distance between the pivot points '28 and 30 is substantially equal to the distance between the pivot points 22 and 24 so that there is an arrangement of a parallelogram, permitting bodily movement of the pressure bar 26 about an arc and maintaining the bar 26 in a horizontal position.

The bar 26 is formed with two parallel plate portions connected together at the outer ends by a portion 32. The links l8 and 20 are positioned between the two portions or the bar 26. Mounted 3 Claims. I (01. 144- 290) at the outer surfaces of the bar 26 are links 34 which have one end thereof pivoted on the rivet 28. These links extend rearwardly toward link 20. Spacing washers 36, at the outer surfaces of the base upright section l2 and [3 or stamping III, are mountedon the rivet 24 and a U-shaped handle 38, having its arms at the outer surfaces of the washers, ispivoted on the rivet 24. The

arms of the handle 38 are angularly shaped as viewed in side elevation and at the juncture of the two portions 40 and 42 forming the angle I have pivotally mounted the opposite end of the links 34, as at 44.-

-When the clamp is in the position shown in Fig.

2 the portion 42 of the arm' forms a continuation of the link 34 with the pivotal point 44 swinging about an are from the pivotal point 24 drawing the pivotal points 28 and 30 upwardly and rearwardly about arcs from the pivots 22 and 24 respectively.

When the clamp is in the position shown in Fig. 1 and the handle moved to the left, the pressure bar 26 is moved upwardly and outwardly toward the work. When the bar reaches top dead center, further movement of the handle toward the left causes the bar to continue its outward movement toward the work and then downwardly into contact with the work. At this point the pivotal point 44 has not reached a center line between pivots 28 and 24 but further movement of the handle toward the centerline greatly increases the downward pressure applied to the bar 26 looking the work in position. Because the pivot 44 has now reached the centerline between pivots 28 and 24 there is no further outward movement of the bar which might cause movement of the work. As shown in Fig. 2 the pivot 44, in its final locked position is caused to pass the centerline between pivots 28 and "24 being limited by a stop 46. This provides an over center lock because any upward pressure on the bar 26 would force the handle against the stop.

I have illustrated the work 48 having a recess. 50. It would be impossible by the use of theusual swinging arm clamp to lock the work by the. bar entering the recess but since the bar moves; slightly upwardly and then rearwardly, it may be:

caused to enter openings in the work and is par-.

ticularly desirable for clamping tubing or parts:

having overhanging projections.

It is to be understood that the clamp may beused for locking the work by a horizontal pressure as well as a vertical pressure because of the forward movement of the bar as well as downward movement.

illustrated, but the clamp may be mounted on a 5 support in any position.

It will be understood that various changes including the size, shape and arrangement of parts may be madewithout departingfroin thespirit.

of my invention and it is not my 'intentionto" l0 limit its scope other than by the terms of the appended claims.

I claim:

1. A toggle clamp comprising a base, a. pressur 4 adjacent to said base and provided with a projecting work engaging portion disposed laterally of said base, said bar having spacedfront and 'rear pivots; swingable links connecting corresponding pivots of said base and said pressure bar; a handle; a link pivoted at one end to the handle intermediate the ends of the latter, said link and an end portion of said handle forming atoggle, and said toggle. pivoted at its ends to the front pivot ofsaid pressure bareahdithe rear pivot of said base.

3, A clamp comprising a base; a pressure bar arranged adjacent to said base and having a projecting work engaging portion disposed laterbar rr a j to s id b se and havin ;;a113e of-said base; a pair of substantially parallel a projecting work engaging portion di'sposedlaterally of said base, a link having: onev'end piv otally connected to one end of said bar, and its opposite end pivotally connected to saidtietse; a second link having one end pivotally connected 2 to said bar at a point spaced from the-pivotal connection of said' first link to s-aid--bar and*its opposite end pivotal-1y connected to saidbase at a point spaced from the'pivotal'connection of" said first link to said base at "a distance-substan- -3;

tially equal to the space between the pivotal con nections on said bar, a handle pivotall'y -eormect'- ed to said base at'thepivo'talcon-nection' between said first link and saidbase; and a third having one end pivotally connected to said bar w links extending between said bar and said base; pivots: connecting said links to the bar and to thegbase, said pivots arranged generally in the rumors parallelogram; ,a handle; a link pivoted at one end to the handle intermediate the ends of t-liedatter, said-linkandan end portion of'said handle forrni'n-g a toggle, and :saidtoggle pivoted at its'ends-toa diametrically oppose'd'pairof said REFERENCES CITED The following reie'r'e'ncs arenrrecordfm the V file'iof this patent:


507,587 Lippitt on, 31 1893 1 2951707 Davidson "Feb, 25, 1919- 35'' 21054572- McKenna Sept. 15, 1936' 2386;56-"1 Olson Oct; 9, 1945

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US507587 *Mar 9, 1893Oct 31, 1893 Nut-wrench
US1295707 *May 1, 1917Feb 25, 1919Jesse H DavidsonWrench.
US2054572 *Mar 29, 1935Sep 15, 1936Detroit Stamping CoToggle clamp
US2386567 *May 22, 1942Oct 9, 1945John OlsonToggle clamping device
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2586798 *Nov 13, 1946Feb 26, 1952Bell Machine CompanyAutomatic mortising and tenoning machine
US2605795 *Mar 11, 1950Aug 5, 1952Marian M TracyAutomatically clamping work supporting stand
US2734574 *May 29, 1953Feb 14, 1956 Work-holding clamp for trimming machines
US2783830 *Jan 28, 1954Mar 5, 1957Needham Mfg Company IncPower actuated tire changing machine
US2929422 *Apr 30, 1958Mar 22, 1960Harry Tyler WalterWall clamp for temporary structures
US3009694 *Sep 19, 1960Nov 21, 1961Blatt Leland FToggle clamp
US3035831 *Nov 29, 1960May 22, 1962Blatt Leland FToggle clamp
US3179370 *Jan 3, 1964Apr 20, 1965United States Steel CorpToggle linkage support
US3204947 *Aug 1, 1963Sep 7, 1965Sendoykas Jack JToggle clamp
US3311367 *Nov 12, 1964Mar 28, 1967Sendoykas Jack JToggle clamp
US3371925 *Aug 4, 1965Mar 5, 1968I S I Mfg IncToggle clamp with unusual rising action
US3807718 *Apr 10, 1972Apr 30, 1974Sendoykas JFast action clamps
US4353536 *Feb 4, 1981Oct 12, 1982Peter MazzottaMiter clamp
US4461946 *Mar 11, 1982Jul 24, 1984Hull CorporationApparatus for clamping an assembly of parts for laser welding
US4955766 *Nov 6, 1989Sep 11, 1990Sommerfeld Craig AHolding fixture for drilling pocket joints
US5704600 *Dec 5, 1995Jan 6, 1998Robinson; Brian OwenPower operated clamp assembly
US6102383 *Oct 21, 1998Aug 15, 2000Tunkers Maschinenbau GmbhCombined centering and clamping device for use in the automotive industry
US6119843 *Feb 3, 1999Sep 19, 2000Robinson; Brian OwenRetractable stop assembly
US6158730 *Aug 19, 1999Dec 12, 2000Coffey; KeithLow-profile mechanical clamp
US6220588Jun 2, 1999Apr 24, 2001Tunkers Maschinenbau GmbhToggle clamping device or piston cylinder unit
US7798750Aug 20, 2007Sep 21, 2010Allen Ip Inc.Drill guide with removeable clamp retainer
DE3033799A1 *Sep 9, 1980Mar 25, 1982Dieter KnauerVerbindungselement
DE3419878C1 *May 28, 1984Dec 19, 1985Sta Co Mettallerzeugnisse GmbhTragplatte insbesondere Transportwagen- od. Palettentragplatte mit Spannvorrichtung
DE3836688A1 *Oct 28, 1988May 3, 1990Audi Nsu Auto Union AgTransport securing device for objects sitting on supports
EP0357377A2 *Aug 30, 1989Mar 7, 1990CODMAN & SHURTLEFF INC.Toggle action aneurysm clip
EP1386697A2 *Jun 20, 2003Feb 4, 2004Luciano MiglioriClamping device for work pieces
U.S. Classification269/47, 269/228, 269/134, 269/91
International ClassificationB25B5/00, B25B5/12
Cooperative ClassificationB25B5/12
European ClassificationB25B5/12