US1478110A - Strap wrench - Google Patents

Description

Dec. 18 1923.

1,478,11116) w. A. ELLISON STRAP WRENCH Filed A112- 2, 1922 Inven'ior. William A. Ellison byMMJ/W Z atented 39cc; 18. 1923.

WILLIAM A. ELLISON, 0F SALEM, MASSACHUSETTS, ASSIGNOR TO DAVID E. MURPHY, OF SALEM, MASSACHUSETTS.

STRAP WRENCH.

Application filed August 2 1922. Serial No. 579,121.

To all whom it may concern:

Be it known that I, VJrLLrAM A. ELLISON, a citizen of the United States, and resident of Salem, county of Essex, State of Massachusetts, have invented an Improvement in Strap V i Trenches, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to strap pipe wrenches and particularly to wrenches of the type in which the strap is detachably and adjustably secured to the wrench body. The advantage of this construction is that when the strap begins to wear at one point itcan be shifted relative to the wrench body so as to bring the wear at another point.

My present invention has for its object to provide a novel and simple means for thus detachably securing the strap to the wrench body.

The features wherein my invention resides will be more fully hereinafter set forth and then pointed out in the appended claim.

11 the drawings;

1 is a side view of a portion of a pipe wrench embodying my invention.

Fig. 2 is a section on the line 22, Fig. 1.

3 is asection on theline 3, Fig. 2.

Fig. i is a perspective view of the wedgeshaped anchoring member.

The wrench comprises awrench body 1 in the form of a handle which is provided at one end with a curved gripping or bitingnose 2. 3 indicates the strap and this is secured at one end to the wrench body and then passes around the pipe i and over thenose 2 and then back along the handle of the wrench body.

One way to use the wrench is as shown in Fig. 2 and when the end of the wrench handle is moved downwardly the action of the clamping biting nose against the strap causes it to grip the pipe with sufficient friction to turn the latter all as usual in strap wrenches.

In my improved wrench thehandle 1 is formed with the two laterally-extendingarms 5 that are connected at their outer ends by thebridge portion 6, thus leaving a space 7 bounded on two opposite sides by thearms 5 and the other two sides by the body of the wrench and thewrench 6.

Thearms 5 are spaced apart a distance equal to the width of thestrap 3 and this space 7 constitutes a strap-receiving openmg through which the strap extends.

For anchoring the strap to the wrench I propose to use the wedge-shaped anchoring member 8, which is of a length equal to the width of the strap and which, therefore, can be inserted-into the aperture 7.

in applying the wrench to a pipe 4:, thestrap 3 will be passed around the pipe and both ends of the strap inserted through the aperture 7, oneend 10 of the strap lying along the inner edge of thehandle 1. Ihe other end of the strap is formed into aloop 9 into which the anchoring member 8 is inserted and then the loop with the enclosed anchoring member 8 is drawn into the opening '2', the open end of the loop and the pointed end of the wedge-shaped anchoring member entering said opening from the rear. Theend 10 of the strap is then pulled to the rear to draw the strap tightly around the strap a and the wrench is then in condition for use as shown in Fig. 1.

The inner face 11 of thebridge 6 is preferably inclined to correspond to the inclination of the wedge 8. When the wrench is used and downward pressure is applied on thehandle 1 the strain on the strap will tend to draw the loop into the opening 7 but because of the presence of the anchoring wedge 8 and also because of the inclined face 11, theloop 9 with its enclosed wedge is prevented from being drawn through the aperture 7 and the strap is thereby firmly anchored to the wrench.

In the use of the wrench theportion 12 of the strap which passes over thenose 2 is that which is subjected to the greatest wear and strain and if the strap shows signs of weakening at this point then theloop 9 with its enclosed wedge may be removed from the aperture '3 and the strap adjusted so as to form theloop 9 in another portion thereof thereby bringing a difierent portion of the strap in engagement with thenose 2.

This construction is very simple and inerpensive to manufacture. It will firmly and securely anchor the end of the strap to the wrench and it provides means whereby the strap may be readily adjusted to bring different portions thereof into engagement with thenose 2.

I claim.

A strap wrench comprising a wrench body having a curved gripping nose and also having ewe arms extending laterally therefrom on the side thereoftoward which the nose curves, :said (arms being connected at their outer ends by a bridge member thereby forming a strap-receiving opening, a Wedgeshaped anchoring member occupying said opening, and a strap extending through said opening over said nose and around the 10 article to be gripped and then back over the nose and through said opening again, the end of the strap being bent around the anchoring member and carried a third time through said opening, whereby when the Wrench is used the strain on the strap tends to draw the anchoring member into said opening and thereby anchor the end of the strap and clamp the body of the strap between the anchored end and the wrench body.

' In testimony whereof, I havesigned my name to this specification.

' WILLIAM A. nLLisoN.

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