US1700953A - Pipe wrench - Google Patents

Description

Feb. 5, 1929. 1,700,953

V. ROSSI PIPE WRENCH Filed July 21, 1927 III 1 /0 all [I 5 I INVENTOR \lenomzio Rossz BY surww,1N-1,U,# W

ATTORNEYS Patented Feb. 5, 1929.

UNITED STATES PATENT OFFICE.

VENANZIO ROSSI, OF HIGHLAND PARK, MICHIGAN.

PIPE WRENCH.

Application filed July 21,

This invention relates to wrenches and particularly to pipe wrenches.

An object of the invention is to provide a pipe wrench the jaws of which may be spread apart without the use of feed screws or the like to adapt said wrench to operatively e11- gage pipe or similarly shaped objects considerablv varying in size.

Another object is to provide a pipe wrench comprising a handle and a pair of jaws terminally carried by said handle and to employ a common means to mount one aw for pivotal movement to and from the other and to mount the last named jaw for sliding movement transversely of the handle.

A further object is to provide a pipe wrench comprising a pair of jaws one of which is pivoted for movement to and from the other. and to maintain the pivotal jaw normally swung toward the other jaw by the action of a spring upon the last named jaw.

Still another object is to provide for an instantaneous adjustment of the jaws of a wrench to adapt it to grip objects considerably varying in size.

These and various other objects the invention attains by the construction hereinafter described and illustrated in the accompanying drawing, wherein Figure 1 is a view of the improved wrench in side elevation.

Figure 2 is a longitudinal sectional view of the same.

Figure 3 is a transverse sectional view taken upon the line 33 of Figure 1.

In these views the reference character 1 designates a handle, which tern'iinally carries a pair of co-acting wrench jaws 2 and 3 having arcuate serrated edge J 2 and 3* for gripping a pipe 3 or the like. The handle extremity which mounts said jaws is formed with a terminally rounded head 4, the forward edge of which is slidably engaged by the rear edge of the jaw 2. The two jaws are mounted upon the head 4 by a pair of sheet metal plates 5 of substantially triangular shape which embrace said head and jaws, and overlap the slidably engaged edges of the head 4 and jaw 2. Said plates are pivotally secured to said head by a rivet 6 or the like and are secured to the jaw 2 by a bolt or the like 7. Said plates project beyond the rounded end of the head 4 to embrace the jaw 3 which is pivoted upon said plates by a rivet r 8 or the like. The jaw 3 is of an arcuate form and projects at one side of its pivot 8 in the 1927. Serial No. 207,382.

direction of the handle 1, being terminally formed with a thumb piece 9 adjacent to the handle for actuating said projecting end portion toward the handle, to thus space the jaws apart. At the other side of its pivot 8, the jaw 3 curves adjacent to the jaw 2, project ing some distance below the latter. Between the central portions of the head 4 and the jaw 2 there is formed a chamber 10 in which is coiled a spring 11, compressed between abutment members 12 and 13 which are respectively integral with the head 4 and jaw Said spring tends to slide the jaw 2 away from the rounded end of the head 4 and thereby acts tl'irough the plates 5 to swing the jaw S normally into proximity to the jaw 2. The rounded end of the head 4 forms a fulcrum member upon which the aw 3 swings as described.

In the use of the described tool, when it is desired to spread the jaws 2 and 3 apart, the operator exerts a pressure upon the thumb piece 9 thus fulcruming the jaw 3 upon the head 4 and acting through the plates 5 to draw the jaw 3 toward the fulcrum end of the head 4, compressing the spring 11. \Vhen the tool is under working stress, as illustrated in Figure 2, the stress reaction upon the jaw 2 is in the direction of expansion of the spring 11 and consequently acts through the plates 5 upon the aw 3 to swing the latter about the fulcrum end of the head 4 toward the jaw 2 so as to grip the work more firmly. Thus the grip of the jaws upon the work increases proportionately to the force re-acting from the work upon the jaws. Preferably the abutment members 12 and 13 are sen'ii-cylindrical and the edge faces of the jaw 2 and head 4, engaged by said members, are semi-cylindrically channeled to guide the jaw 2 in its sliding travel. It is of ,course to be understood that a slight play is afforded between the head 4 and the jaw 2 in a direction transverse to their relative sliding permitting the slight arcuate motion of the head 2 about the rivet 6 which is incidental to such travel.

The described mounting of the jaws permits a suflicient spreading thereof to adapt the tool for use upon pipe or the like varying considerably in size, and this adaptability is achieved in a very simple manner with relatively few parts and without employment of feed screws or similar mechanisms.

While it will be apparent that the illustrated embodiment of the invention herein disclosed is well calculated to adequately fulfil the objects and advantages primarily stated, it is to be understood that the invention is. susceptible to variation, modification and change within the spirit and scope of the subjoined claims.

What I claim is 2 1. A wrench comprising a pair of co-acting jaw members, a handle formed with a fulcrum upon an end portion thereof for one of said jaw members, and having an edge of said end portion transverse to the length of said handle slidably interfitting with an edge of the other jaw member, a plate pivoted upon said end portion, and means separately pivoting said jaw members upon said plate, the plane determined by the pivot mounting said plate upon the handle and by the pivot mounting the second jaw member upon said plates, extending in approximate parallelism with the handle.

2. A wrench Comprising a handle having a projection upon an end portion thereof forming a fulcrum, a plate pivoted upon said end portion, a jaw member pivoted upon said plate and engaging said fulcrum, a coacting jaw member pivoted upon said plate. and a spring re-acting between said second jaw member and said end portion of the handle to urge the second aw member from said fulcrum, the second jaw member and said handle having portions forming abutments for said spring interfitting to guide the second jaw member in a sliding travel transverse to the length of the handle.

3. A wrench comprising a handle formed with a fulcrum upon one end portion thereof, a plate pivoted upon said end portion, and a pair of coacting jaw members separately pivoted upon said plate one thereof being engageable with said fulcrum and the other having an engagement with said handle maintaining the coacting relation of said jaw members.

4. A wrench comprising a handle formed with a fulcrum, upon one end portion thereof, a pair of plates copivotally mounted upon said end portion, one at each side thereof, and a pair of coacting jaw members separately pivoted upon and between said plates, one thereof being engageable with said fulcrum and the other having an engagement with said handle maintaining the coacting relation of said jaw members.

In testimony whereof I hereunto set my hand.

VENANZIO ROSSI.

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