US742389A - Pipe-wrench. - Google Patents

Description

No. 742,389. PATENTED OCT. 27, 190.3. F. D. BULLARD.

PIPE WRENCH.

APPLICATION FILED MAR. ze. 190s.

.N0 MODEL.

ma wams Pneus co. Pac-mgmt.. Munn/1mm. c

UNITED STATES Patented October 27, 1903.

PATENT OEEICE.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 742,389, dated October 27, 1903.

` Application filed March 26,190. Serial No. 149,689. (No model.)

.To @ZZ whom it may concern,.-`

Beit known that I, FRANK D. BULLARD, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Pipe-Wrenches, of which the following is a specification.

The object of my invention is to provide a pipe-wrench which will operate effectively upon pipes of several different sizes and which will automatically adj ust itself to the different sizes. I accomplish this object by the wrench described herein and illustrated in the accompanying drawings, in which- Figure l is a side elevation of my wrench in its normal position. Fig. 2 is an end elevation of my wrench looking at it from the rear or handle end. Fig. 3 is aside elevation of the wrenchin its open position gripped by the hand ready -to be placed'on a pipe.

In the drawings, A'is the outer jaw of my wrench, the upper or inner face of which is preferably in the form of a slightly-obtuse angle with teeth A therein, as shown. This jaw could be circular in the toothed section, if desired. To this jaw is pivoted the handle B. To the outer jaw intermediate its connection with the handle is pivoted the inner jaw C, which has a circular face provided with teeth C' presented toward the teeth of the outer jaw. The inner jaw is provided with a rearwardly-projecting shank, which bears upon a boss B', formed on the edge of the handle at the forward end thereof just back of its junction with the outer jaw, the back of which shank is roughened, so that in use,

the thumb may not slip thereon. A small portion C" of the shank projects down the side of theboss and turns into a groove B in the boss. This groove is near the front face of the boss and follows the contour-line thereof and guides the shank of the inner jaw to always keep it in engagement with the boss of the handle, and thereby prevents the handle from accidentally turning on the pivot which joins it to the outer jaw. A socket D (shown in Fig. l) houses one end of spring E, the other end of which surrounds stud F, mounted in the outer jaw. This spring keeps the jaws normally closed, as shown in Fig. l.

In operating the wrenchV the handle is gripped with the fingers of the hand, and the thumb is placed on the shank of the inner jaw, and it is pushed forward, passing down in front of the boss which carries the free end of the outer jaw backward toward the handle, thereby causing the jaws to separate when they are placed on pipe G, as shown in Fig. 3. As soon as the wrench is on the pipe the thumb is removed, and the spring causes the jaws to grip the pipe, when by turning the handle in the proper direction the pipe may be screwed into or out of engagement with another section, as desired.

Byhaving a boss on the handle to engage the shank f the inner jaw the jaws may be opened wider and a greater range of use is obtained in a wrench than if such boss were not used. By having -the inner face of the outer jaw the form of an obtuse angle and the outer face of the inner jaw circular in form the jaws bear upon the pipe, no matter what its size may be, at three points, and the crushing strain upon the pipe comes on a line at an angle to the diameter of the pipe, and thereby avoids all danger of crushing the pipe. When used for nuts, the teeth on the jaws may be omitted, if desired. The tooth-` section of the jaws may be removable sectors, if desired.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is4

l. A pipe-wrench composed of a handle having a boss on the edge near the inner end thereof; an outer jaw pivoted to the inner end of said handle in front of-the boss; an inner jaw having a shank pivoted to said outer jaw a little in front of the connection between said outer jaw `and handle, said shank being adapted to pass down in front of said boss when the jaws are opened for placement on a pipe and to be raised by said boss to close the jaws when the wrench is being operated.

2. A pipe-wrench composed of a handle having a boss on the inner end thereof; a groove in said boss; an outer jaw pivoted to the inner end of said handle, an inner jaw, having a shank, pivoted to said outer jaw near its junction with the handle, said shank being adapted to pass down in front of said boss and having a portion extending into said groove in said boss; a socket in the shank of IOO said inne'rjaw; aspringin said socket adapted jaw a little in front of the pivotal connection to bear against said outer jaw. between said outerjaw and handle,said shank 3. A pipe-Wrench composed ofahandle hav- I of said jaw being adapted to bear against the ing a boss on the edge near the inner end boss of said handle. 15 5 thereof; an outer jaw pivoted to the inner In Witness that I claim the foregoinglhave end of said handle in front of the boss having hereunto subscribed my name this 20th day its upper face in the form of an obtuse angle of March, 1903.

with teeth therein; an inner jaw having a FRANK D. BULLARD.

circulaiface with teeth therein projecting Witnesses: Io toward the teeth of the outer jaw and a rear- G. E. HARPHAM,

Wardly-projeeting shank pivoted to said outer MARGARETE C. NICKELESON.

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