US361258A - Samuel j - Google Patents

Description

(No Mode1.)-

-S*J.BENSON.

PIPE WRENCH.

4Patented Apr. 19,Al887.

UNrTED STATES PATENT OFFICE.

SAMUEL J. BENSON, OF WASHINGTON, DISTRICT OF COLUMBIA.

l SPECIFICATION forming part of Letters Patent No. 361,258, dated April 19, 1887.

Application filed January 27,1887. Serial No. 225,640. (No model.)

' the city of Washington, in the District of Columbia, have invented certain Improvements in lipe-lrenches,y of which the following description, in connection with the accompanying drawings, is a specification. v

My improvements relate to pipe-wrenches wherein the most desirable features of different classes are 'combined and concentrated with special modifications of construction and action, resulting in a wrench having decided practical advantages, and,when considered as herewith presented, differing materially from any wrench known to me.

My object is to provide a wrench which can be quickly adjusted, having a positive grip, the strain and points of contact so divided that unnecessary crushing or flattening of pipes may be avoided-a wrench in which the deli-` cate actuating parts areinclosed and protected from external strains and blows, and having no unnecessary projections or bulging parts to interfere while operating in limited spaces, and possessed of the essential qualities of cheapness and durability. Iattain this object by the means and mechanism described in the following drawings, in which- Figurel is a longitudinal elevation showingv the wrench as it appears when set on a pipe. Fig. 2 is a longitudinal section of Fig. l. Fig. 3 is a vertical crosssection on the line ab, Fig.

2. Fig. 4 shows a modication of the abutment and pivotal bearings. Fig. 5 is a vertical cross-section on the line a b, Fig. 4.. l

Similar letters refer to corresponding parts in the different views.

The hooked lever A A forms and includes the shaped fixed jaw B on this end of the lever, and on the edge opposite to the jaw B is a serrated rack, O. Between O and c is the guide-bar and serrated rack, the remainder, forming the necessary continuation of the lever, terminating in any suitable hand-hold.

D is a movable sleeve sliding freely upon the lever A. At S is shown the arrangement of the abutment and pivotal bearing of the vibrating serrated jaw E, and at F is the ful- E is a jaw having a serrated face. It is pivoted, as shown, and provided with an exten sion or thumbpiece, e. Underthisisaspring, R, which forces the jaw into contact with the pipe while working. This jaw is held in place and vibrates freely between the sides of the movable sleeve.

G is a serrated die, formed into or properly secured within the movable sleeve, and conforms to and interlocks with the corresponding rack, O, on the lever, which is located upon the lever on the end opposite to the handle, and on that edge of the lever opposite to and farthest from the fixed jaw B.

At J is a spring to keep the serrated face on the lever at C and the serrations G in the movable' sleeve in contact and to facilitate the adjustment of the wrench.

From F, on the angle of the dotted line to d, a small open space is shown between the sleeve and lever, which allows room for aprying action resulting from the thrust of the jaw E, the strain and movement being in part transferred to and turning upon a fulcrum-poiut at F, thus pulling and prying the serrations C and G into firmer contact and increasing and assuring the certainty of the grip of the sleeve upon the lever. The sleeve vibrates upon this fulcrum-point F when the wrench isbeing adjusted to or removed from a pipe or other object.

Figs. 4 and 5 show the modifications above referred to. i The difference results and grows out of whetherthe serrated vibrating jaw E moves upon an internal or external pivotal bearing at S. The views and lett-ers above given apply to corresponding parts. In using the internal bearing, Acast solid in the sleeve, the hub of the jaw E would be slotted to permit it to pass over and engage with the bearing at S, as shown.

The operation is as follows: The wrench is firmly grasped around the neck of the movable sleeve D, inclosing the extension e of the j aw E, which raises or throws outward the Serrated end of the jaw E. Thehandle of thelever A being held in theother hand, a slight rocking movement in opposite directions releases ICO the interlocking serrations of the lever and sleeve, when the sleeve may be slid at will upon the lever, in order to remove it from or to adj ust it upon a pipe or other suitable obposite edge and the sanie end of the lever, in combination with the movable sleeve D, having midway between its ends a fllcrum by which it vibrates upon the inner edge of the lever A, and carrying and inclosing the pivoted serrated jaw E, the springs R and J, and serrations G.

SAMUEL J. BENSON. Vitnesses:

N. D. ADAMS, BENJ. F. GARDNER.

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