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 numberUS347262 A
Publication typeGrant
Publication dateAug 10, 1886
Publication numberUS 347262 A, US 347262A, US-A-347262, US347262 A, US347262A
InventorsAlfeed Wood
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Alfeed wood
US 347262 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

(No Model.)


WRENCH. I No. 347,262. Patented Aug. 10, 1886.




'ZPECIFICATIQN forming part of Letters Patent No. 347,262, dated August 10, 1886.

Application filed December 14, 1885. Serial No. 185,613. (No model.)

To all whom it may concern: I

Be it known that I, ALFRED WooD, of Trenton, county of Mercer, New Jersey, have'in- Vented a new and Improved Wrench, of which the following is a full, clean-and exact de scription.

My invention consists of a wrench constructed with lift-cams to act against the nut for lifting the wrench, as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in both figures.

Figure 1 is a plan view of an ordinary wrench made in accordance with my invention. and Fig. 2 is a sectional side elevation of the same.

A represents the handle of the wrench, and B the socket to receive the nut. The socket B is formed with square corners or faces a a, that abut against the faces of the nut when the handle of the wrench is turned in the direction of the arrow in Fig. 1, and cause the nut to be turned with the movement of the Wrench. The socket of the wrench is also formed with the cams b b at the corners of the socket B, adjacent to and on the opposite angle to the plain surfaces 01, as shown in Fig. 1. These cams are slanted from their point of juncture with the plain surface a. at or near the bottom of the socket B, outward to the face of the wrench. so that when the handle of the Wrench is moved in the direction opposite to that indicated by the arrow, or backward for taking a fresh hold upon the nut, the cams will act upon the corners ofthe nut and cause the wrench to be lifted or moved to the top of the nut, so that the wrench will return without turning the nut and withouta special movement on the part of the user to detach or lift the wrench from the nut, as with ordinary wrenches, when the socket or jaws of the wrench are made square or perfectly flat.

W'ith this wrench no movementis required but to move the wrench back and forth, as the cams lift the wrench to the top of the nut upon the back-stroke and gravity causes the wrench to drop over the nut.

This wrench is particularly useful because it can be operated with much greater ease and rapidity than ordinary Wrenches.

Having thus described my invention. Iclaim as new and'desire to secure by Letters Patent- As a new article of manufacture, a wrench having square faces a and cams I), the square faces being adapted 'to turn the nut, and the cams to lift the wrench to the top of the nut, substantially as and for the purposes described.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2465048 *Oct 19, 1944Mar 22, 1949William E MchughWrench head for tightening wing nuts
US2774259 *Jul 11, 1955Dec 18, 1956Caulkins Frank TMethod of making box wrenches
US3161090 *Oct 17, 1962Dec 15, 1964Mclellan Silas BStud engaging wrench having a fluted gripping surface
US4981383 *Dec 7, 1989Jan 1, 1991J. S. Staedtler Gmbh & Co.Device for screwing a writing instrument tip into a writing fluid reservoir
US5860339 *Sep 3, 1996Jan 19, 1999Snap-On Technologies, Inc.Drive configuration with differential driving surfaces
Cooperative ClassificationB25B13/04