US546443A - Pipe-wrench - Google Patents

Description

(No Model.)

E. WRIGHT.

PIPE WRENCH.

Patented Sept. 17, 1895.

UNITED STATEs PATENT @Enron EDY/YARD WRIGHT, OF WORCESTER, MASSACHUSETTS.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 546,443, dated September 1'?, 1895. VApplication tiled February 9,1895. Serial ll'o. 537,765- (No model.)

To @ZZ whom, t may con/cern: ing it centrally in position. The space within Be it known that I, EDWARD WRIGHna citi` the guide-box of the slide-har is made of sunrizen of the United States, residing at VVorcescient width to afford aliinited degree of bacli- 55 ter, in the county of Worcester and State of ward and forward play between the bars A 5 Massachusetts, have invented a new and useand B, as at I, the parts swinging from the ro- .t'ul Pipe-.Vrencli, of which the following, tosette as a center, and a spring K is arranged gether with the accompanying drawings, is a between the inner surface of the lips b and specification sufficiently full, clear, and exact face of the bar A to normally press the bars 6a to enable persons skilled in the art to which toward each other. Said spring is retained by ro this invention appertains to make and use the a pin m or in other suitable manner. The

saine. bars are preferably of steel castings or drop- The object of my present invention is to forged, and the cheek-plates B2, which form provide a strong, simple, and practically eflthe guide-box, are primarily made outwardly 65 cient adjustable pipe-wrench that can be1naninclined, as per dotted lines, Fig. 3, so that the 15 ufactured with economyand facility; and my bar A can be entered between the lips b.

invention consists in a pipe-wrench in which Then these cheek-plates are bent or set inthe parts are made and combined in the peward by aid of suitable dies, bringing the culiar ina-nner hereinafter set forth. cheeks parallel with the sides of the bar A 7o In the drawings, Figure l is a side View of and closing the lips b over the angle of said zo the pipe-wrench constructed in accordance bar, as shown in full lines, Fig. 3.

with my invention, with dotted lines indicat- The body portion of the bar B is best made ing the internal structure. Fig. 2 is a front the saine width as the jaw B', thus giving anlview of the same. Fig. 3 is a transverse secplestrength to avoid bending orfracture when 75 tion atV line X X, and Fig. 4 is a transverse put to the severest strains in the use of the z5 section at line Y Y. i wrench.

Referring to parts, A denotes the main bar, The jaw-faces are both upwardly inclined, having upon its upper end the jaw A and at that of the jaw B being inclined to somewhat its lower end the handle A2. Upon the back greater degree than the face of the jaw A. 8o of the bar there are formed two projections a3 Their faces are serrated or provided with 3o and a4, with an intervening space between oppoSitely-directed teeth, as usual in pipethem. The projection c3 is bifurcated or verwrenches. tically recessed to serve as a journal-bearing The operation of placing the jaws upon the for the adjusting-screw. pipe swings back the top of the bar B, as in- 85 B indicates the slide-bar, having the outer dicated in Fig. l. Then when the handle is 35 jaw B formed on its upper end and provided swung around in the direction of the arrow at its lower portion with cheek-plates B2, with the jaws, by the slight rolling action afforded inwardly-overhanging lips b along their front by the space l, are caused to firmly grip and edges, that loosely embrace the main bar A turn the pipe. The strain of the jaw B is go and form a guidebox for the adjustable jawsustained by tensile action through the screw 4o bar,in the manner indicated. The lower end D drawing the rosette D against the projecof the slide-bar B is chambered and intertion a5, and this is sustained by a thrust acnally screw-threaded to receive the adjustingtion on the bar A from the jaw A. This conscrew D, which latter is provided with a rcstruction maires a very strong wrench, one 95 sette-head D', that is disposed and loosely that can be operated with convenient facility,

45 confined within the space between the pro` and which can be manufactured with economy jection a3 and o4 upon the bar A, the neck of and little labor. the screw being embraced by the bifurcated I claim as myinvention herein to be secured projection ai and the screw centrally retained by Letters Patentzoo by a pintle-stud F, fixed in the projection a4, 1. The within described pipe-wrench, coin` 5o with its end entering an axial recess formed prising the main bar, its upper end formed as in the rosette and there tting loosely, so as a jaw and its lower end a handle, and proto allow free action of the screw while retainvided with projecting bearing portions upon its hack edge above the handle, the slide-har having lthe outer jaw at its -upperemL and :internally chamhered and threaded at yits lower endl, its lower body portion provided- `with lipped cheek-plates that forma guidebox loosely about;k said main har, and the ad.- justing screw itsthxead tting the threadiu said slide-bar, its neckembraced Aby the bifurcated bearing projection on the main bar with its rosette head loosely con fined in the space below said bearingysaid slide-bar and its jaw havingl a limited backward and foi`` f ward swing relative to the main bar, from the rosette head as a center, for k"fhe'purpose set forth.

Vil. In a pipe-wrench,the main' ybai'A having the jawA, the handle A2 and the backward projections, @Bend a thereonfwith a recess between said projections; the slide-bar B formed with jaw B and cheekplates B2, the latten loosely embracing said-mainbai', the adj ustf ing-screw llthreaded inio'said slide-bar, its neck journaled iu the projection a3 and having the rosette-headdisposed.Within the `recess between the projections, and lthe pimieengaging within au axial opening in said rof fsetcehead,y and thespring disposed between lthe overhanging lips .on said cheek-plates and the front of said main bar, all combined for. operation substantially as and for thepur- 25 f stud-F xedin the projection 0,4 with its end f

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