US2253895A

US2253895A - Wrench

Info

Publication number: US2253895A
Application number: US367840A
Authority: US
Inventors: Denovich Robert
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-11-29
Filing date: 1940-11-29
Publication date: 1941-08-26
Anticipated expiration: 1958-08-26

Description

' Aug. 26, 1941. I

R. DENOVICH 2,253,895

WRENCH Filed Nov. 29, 1.940 2 Sheets-Sheet 1 In men tor i 06 er?" ,Deflo V/cfi A iiorney Aug. 26, 194 1. R. DENOVICH WRENCH 2 Sheets-Sheet 2 Filed Nov. 29, 1940 Inventor Fab er? ,Dezvar/cfi Attorney Patented Aug. 26, 1941 UNITED STATES PATENT. OFFICE WRENCH Robert Denovich, Barberton, Ohio Application November 29, 1940, Serial No. 367,840

Q 1 Claim. (01. 81-139) 7 v This invention relates to wrenches and more particularly to wrenches of the type known as slide or monkey wrenches; and an object of the invention is to, generally, improve upon such types of wrenches as are now known and used.

More particularly the invention has as its object to provide a more efficient means for securing the jaws at the desired position of adjustment; such jaw-retaining means being operable to effect a quick release to permit adjustment of the jaws, and an equally quick securing of the jaws in the desired position of adjustment.

The invention together with its objects and advantages will be best understood from a study of the following description taken in connection with the accompanying drawings wherein:

Figure 1 is a longitudinal sectional view through the wrench illustrating certain details hereinafter more fully referred to.

Figure 2 is a side elevational view of the wrench.

Figure 3 is an elevational view of a pawl assembly forming part of the invention, with certain parts of the lever forming part of said assembly being broken away and shown in section.

Figure 4 is a detail sectional view taken substantially on the line 4-4 of Figure 1.

Figure 5 is an elevational view of the shankequipped jaw forming part of the invention.

Figures 6 and 7 are detail sectional views taken substantially on the lines 6-6 and '|1, respectively, of Figure 1.

Referring more in detail to the drawings it will be seen that in the preferred embodiment thereof the wrench embodies a shank 5 that at one end is equipped with a suitable handle 6; the handle 6 being preferably composed of two complemental grip members between which one end of the shank is disposed, and which are secured to said end of the shank through the medium of screws or other fastening elements 1.

At the opposite end thereof the shank 5 is formed with an integral jaw 8.

Complementing the jaw 8 is a jaw 9 that is formed integral with a sleeve I0 adapted to slide on shank 5.

To insure smooth operation of the wrench, and particularly incidental to eifecting an adjustment of the wrench, sleeve 10 is provided internally thereof with opposed pairs of ribs I I, and to complement the ribs II, the shank 5 is provided on opposite longitudinal edges thereof with longitudinal grooves 12 (see Figures 5 and 6).

Accommodated within the sleeve IEI are pawls l3 and I4 disposed at opposite sides of the shank 5 and provided respectively with teeth 15 and I6, respectively, that engage rack teeth I! and 18, respectively, provided on opposite longitudinal edges of the shank 5 as shown. I

The pawl 13 is formed integral with one end of a lever 19 that is accommodated in a suitable recess 20a provided therefor in the sleeve I0 as shown in Figure 1.

The lever 19 is angular in shape and at the angle between the respective opposite ends thereof the lever 19 on one side is provided with a fulcrum rib or protuberance 20 that engages in a seat 2| provided therefor in the sleeve ID at one side of the recess 20a as shown in Figure 1.

At the side thereof opposite to the fulcrum formation 29, the lever l9 seats against a retaining bolt 22 that threads into the sleeve to extend transversely of the recess 20a and as will be clear form a study of Figures 1 and 4.

The lever I9 is normally biased in a direction to engage the pawl 13 thereof with the shank 5 through the medium of a coil spring 23 that has, an end thereof seated in a recess provided there for in the sleeve l9 and a second end thereof impinging against the free end of the lever 19 as shown in Figure 1.

For the lever 19 there is also slidably mounted on the sleeve I 0 adjacent the inner end of the recess 29 a spring-biased push button 25 that engages, as shown, the inner end of the lever l9 for causing the latter to pivot and swing against the opposition of spring 23 to move the pawl 13 out of engagement with the shank 5.

Pawls I3 and M are operatively connected together so as to work simultaneously with one another for effecting a clamping of the jaws 8 and 9 at the desired position of adjustment, and for effecting a release of the jaws to permit shifting thereof to thedesired position of adjustment.

To the end just mentioned there are pivoted in the sleeve ID at opposite sides of the shank 5, and. as indicated at 26, relatively short rocker arms 21.

Links 28--28 pivotally connect one of the rocker arms 21 with the pawls I3 and 14, while links 29, 29, pivotally connect the other of the rocker arms 21 with the pawls l3 and M in a manner clearly shown in Figures 1, 3 and 7. Thus it will be seen that through this articulated connection between the pawls l3 and I4, movement of the 0 lever l3 results in a simultaneous shifting of the pawls l3 and [4 into and out of engagement with the shank 5.

From the foregoing description it is obvious that by pressing inwardly on the button 25 lever l9'will be rocked on its fulcrum to effect a disengagement of the pawls I3 and M to release the shank 5. With the shank thus released jaws 8 and 9 may be shifted relative to one another to the desired position of adjustment. Upon such adjustment of the jaws release of the button 25 will result in the lever l9, in response to the action of spring 23 swinging in a direction to engage the pawls l3 and M with the shank 5 there: by eifecting a securing of the jaws 8 and S in this desired position of adjustment.

It will also be apparent that by removing the grips of the handle 6 and shifting the pawls I 3, I 4' to a released position, the shank 5 may be drawn,v

entirely through the sleeve ID for efi'ecting a total separation of the jaws.

It is believed that the simplicity, utility and a vantages of a Wrench embodying the features of.

the present invention will be understood by those skilled in the art without further detailed description.

It is also understood that it is in no wise intended to restrict the invention to the precise embodiment herein illustrated, and that I accordingly claim all such forms of the invention to which I am entitled in view of the prior art and scope of the claim hereunto appended.

Having thus described the invention what is claimed as new is:

In a wrench, a shank, a relatively fixed jaw on one end of the shank, a sleeve slidable on the shank and provided with recesses located at 0pposite edges of the shank, a movable jaw integral with the sleeve, ratchet teeth on said edges of the shank, opposed toothed dogs coasting with the ratchet teeth and arranged in the recesses, short levers pivoted intermediate the ends thereof within the sleeve at opposite sides of the shank, oppositely extending links pivoted to opposite ends of one of the levers and to the opposed clogs, oppositely extending links pivoted to the opposite ends of the other lever and to the opposed dogs to bring about a reverse movement of one of the dogs through the movement of the other dog by the actuation of the latter-named dog, a spring influenced lever pivotally mounted in one of the recesses and formed on the last-named dog and normally urging said dogs into engagement with theratchet teeth, and a spring influenced finger plunger-engaging-thelast-named lever and slidably mounted in the. sleeve.

ROBERT DEN OVICH.