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.


  1. Advanced Patent Search
Publication numberUS1426553 A
Publication typeGrant
Publication dateAug 22, 1922
Filing dateJul 11, 1921
Priority dateJul 11, 1921
Publication numberUS 1426553 A, US 1426553A, US-A-1426553, US1426553 A, US1426553A
InventorsAlexander Cruickshank
Original AssigneeAlexander Cruickshank
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1426553 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)




T 0 all whom it may cof/wem:

Be it known that I, ALEXANDER CRUIGK- sHANK, a citizen of the Dominion of Qanada, residing at Clayburn, in the Province of British Columbia, Canada, have invented certain new and useful Improvements in Pliers, of which the following is a specification.

vthe iaw securing pawl in the retaining position, the dot and dash lines showing therelease position of the pawl, and

Fig. 2 is a plan of the same.

In these drawings 2, 3 represent the opposed plier members Vwhich are pivotally connected together by the screw or rivetl 4L, and the jaws of which are serrated as at 5, to aiford an eficient hold.

Concentric with the pivot 4 one edge of the memberl 3 is notched as at 6 with a series of teeth adapted to receive the end 7 of a securing pawl pivoted at 8 to the adjacent portion of the other member` 2.

This pawl 7 has a portion 9 projecting from the side opposite its pivot 8 and having a resilient tendency toward the edge of 3. This portion 9 has a projection l10 from its end which is ygrooved as shown in Figure 2 and engages the edge of the handle portion of 2 (see dotted lines Figure'l) and retains the pawl in or out of holding engagement with the notches 6 of the member 3. according as it is on onev side or the otherv of the handle member 2.

Although for purposes of illustration the pawl notches'm are shown as coarsely pitched they may be of any size, consistent with strength that will serve the requirements of the graduation'in the jaw opening of the pliers.

Y The pliers may thus be set to any desired width of opening within their scope, while the pawl 7 is clear of the notches 6, and the pawl be then moved into engagement Specicaton of Letters Patent. Paijnted Aug. 22, 1922.'

Application `filed July 11,

1921. Serial No. 483,884.

The pliers may then be used as a ywrench without the requirement of having to grip the handle members together.

It will be noted that the addition of this securing means to the pliers does not interfere with theirfree use as such.

The use of such pliers for holding the head of a bolt while the nut is being screwed on or ofi', or for tightening a nut on the bolt is growing in favor, as the tool is a convenient one for this purpose. Thefaddition set forth in the foregoing renders the pliers more serviceable in'suchuse.

Having now particularly described mv invention, I hereby declare that what I claimas new and desire to be Letters Patent, is:

vl. The combination 'with `a pair of pliers, the handle and jaw' members of which areprotected in by l ber concentric with the pivot about which the plier members move, said pawl having a resilient arm provided with a grooved end adapted to spring over the edge of the handle of the plier member on which said pawl is pivot-ally mounted to hold said pawl out of engagement with said notches. 2. The combination with a pair of pliers, the handle and jaw members of which are pivotally connected together, one yof said pliers having ratchet teeth, apawl pivoted to the other plier member and adapted to engage said ratchet teeth to retain the plier members a definite4 distance apart, the said pawl having a resilient portion with a projection adapted to engage the handlc portion of the plier member to which it is pivoted to retain the pawl in or out of holding engagement kwith the ratchet teeth accordingly as it is desired to'retain the plier members a definite distance apart or not In witness whereof -I have aiiixed myl signature.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2523385 *Feb 6, 1946Sep 26, 1950Mead Lawrence CLever and cam operating means for releasing locking pliers from locked position
US2577008 *Jun 18, 1949Dec 4, 1951Engstrom Oscar LTourniquet clamp
US3013456 *Sep 29, 1959Dec 19, 1961Ernferd Ericson AlfPlier with locking feature on pawl
US3839930 *Jan 9, 1974Oct 8, 1974Taylor CMethod and device for holding or clamping an article
US3890858 *May 20, 1974Jun 24, 1975Amp IncWire stripper
US4232573 *Jan 8, 1979Nov 11, 1980Dace Jr Marvin HSlip pliers with lock
US5968051 *Jul 27, 1995Oct 19, 1999Johnson & Johnson Professional, Inc.Patella clamping device
US6128975 *Mar 17, 1998Oct 10, 2000Schley; Paul E.Hose clamp pliers & method
US6952984 *Apr 15, 2004Oct 11, 2005Ching-Shu WangStructure of open end wrench
US20040194587 *Apr 15, 2004Oct 7, 2004Ching-Shu WangStructure of open end wrench
U.S. Classification81/320, 81/328, 81/341, 81/337, 81/180.1
International ClassificationB25B7/16, B25B7/00
Cooperative ClassificationB25B7/16
European ClassificationB25B7/16