US2089589A - Wrench - Google Patents

Description

S. UVANEY WRENCH Aug. 10

Filed May 18, 1936 INVENTOR Stephen Jamey Patented Aug. 10, 1937 UNITED STATES PATENT OFFICE This invention relates to improvements in wrenches (especially the Stilson type), particularly jaw-wrenches useful for manipulating long or heavy pipe.

One object of the invention is to provide twojaw wrench formed to grip almost entirely around the circumference of a pipe, and in any event to grip at three or more areas simultaneously, thus affording a very extensive surface (or surfaces) gripped by the wrench.

A second object of the invention is to provide at least one jaw of such a wrench with an inwardly-extending pipe-gripping portion, or continuation, shown as a depending bill in the accompanying drawing, in consequence of which arrangement the tool has, when in use, the extensive gripping surface (or surfaces) spoken of.

A third object of this invention is to provide grips around various sizes of pipes and other ob-' l Jects.

A fifth object of the invention is to provide a wrench having several cooperating parts having 30 limited movements relatively one to the other, to the end that the wrench may have a ratchet action with respect to a pipe or other object.

A sixth object of the invention is to provide a wrench having novel constructions and combi- 35 nations of parts.

A seventh object of the invention is to provide a form of wrench capable of gripping and turning a pipe very quickly, as compared with jaw Wrenches heretofore in use.

The accompanying drawing illustrates one form of wrench which embodies my present improvements. As hereinafter mentioned, said improvements may be embodied in other forms of Wrenches.

Figure 1 is a side view of a specific form of the wrench, with the jaws opened, to release or to grip a pipe, or other object. Fig. 2 is a like view, (parts being shown as being broken away, for clearness).

The figure shows, particularly, the relation of shape of the freely-movable jaw and parts. Fig. 3 is a rear view of the wrench, showing the relation of the jaw-parts, and looking from the right 55 towards the left of Figure 1.

Figure 4 is a cross-section, through the line 44 of Fig. 2, and looking in the direction indicated by the arrows.

Figure 5- is a view in perspective of the movable jaw and the integral bifurcated shank. 5 Referring to Fig. 2, said figure illustrates the wrench as gripping around a pipe (dotted) and over a very large extent of the circumferential surface thereof.

A indicates the handle of the wrench. It is 10 shown as broken away in Figs. 2 and 3, to permit a more close grouping of the several figures.

B indicates a yoke, which has a tubular guideopening, 0, from top to bottom and through said yoke. The side members of the guide opening 15 are provided with short crosswise slots, as hereinafter mentioned. As illustrated, the handle and the tubular yoke, B, may be a single metal casting or forging. The handle-member also has a gripping part, shown in the drawing as an inserted and replaceable plate, D, of hard metal, with a plurality of gripping teeth or ribs thereon, so as to be crosswise of the fixed member of the wrench when the latter is in use. The jaw D can conveniently be termed a fixed jaw, inasmuch as it performs its function in fixed position.

The handle-member of the wrench movably carries a gripping member combined therewith, and with novel parts, in such fashion that said gripping-member cooperates to automatically grip around the exterior of a pipe (or other object). In addition to achieving such result, the special combination and arrangement of parts shown in the accompanying drawing, also grips around the exterior of a pipe at more than two surface areas, that is at three or more considerable or large surfaces. Thus, inspection of Fig.

2 will show that the gripping ribs or teeth of the handle-member and those of the separately movable jaw grip around at least one-half of the entire circumference of a pipe (the latter being shown as a dotted circular figure).

In the illustrated specific embodiment of my invention, the movable wrench-jaw, E, is shown as having two loosely connected portions, E and G, one of these (E) having a solid head, and being also bifurcated, or forked, as particularly shown in Figure 5. The free end of the auxiliary jaw G is integral with a slide, H, shown in Figs. 1 and 2 and slidably fits within the guide B, hereinbefore spoken of as being integral with the handle-member, A. The other (upper) end of the auxiliary jaw G is loosely connected between the upper ends of the legs F and F of the forks, by means of a bolt which passes through the 55 said upper end of auxiliary jaw G and also through openings and 0' across the movable jaw-part, E. A bolt, 0 is used for the purpose, as shown in Fig. 2, and also passes through a 5 slot, P, in the upper end of the auxiliary jaw, G, with the result that the auxiliary jaw G moves not only around the axis of the bolt but may also swing away from the same for a small distance.

As before stated, the movablejjaw, E, is formed to provide thegforksFand F. These forksare each slotted, longitudinally, as shown at J and J.

The forks (F and F) straddle, and fit at oppowhichsalso'ipasszthrough-the longslots, J V and J, ofithe forksyiFhand Eyserving as guides for said forks during the closing and theopening of the jaws-of the wrench.

ofitheJs1-ide;: H,::is.provided with a racklX, the

teeth thereofbeing disposed to be engaged by the toothiofxapawl, operable-to unlocking posi-' tion by the users finger, and to the locking posie ti'on'i by a spring,:Z..- .eRar-tticular attention is called to the form of the movable jaw E; and the auxiliary jaw G especially-'lshown'in -Figsi -1, 2-and 5, .the' novel and highly -tefiioi-entfeature J being 'that the forward end-ofithe jaw E is provided with an extension (bill ;-=ne b orthe like'rwhich in use tends to overhang the- 'jaw D 'ofthe handle-member. The

overhanging or extending portion, identifiedas E=',='of-= the jaw E as well-as the under surface of @0 the me'rnber- -G are both provided with gripping teth' or-ribs, E ,and these-cooperate with'each other-,and-'also-'withthe gripping means of the fixed jaw n to grip around three or more surface area/spit' a pipe, holding the same firmly-when desired, -over--one-halfor more of the circumferenceof-the pi-pe.-'-

:The manne'nof assembling-the parts-o'f'the illustrated; -wre nch will be obvious to any personskilled-n the 'eperatiom and construction of wrnche .7 v V engaged -fromthe rack, 'X; and the slide H is As shown QineFigs. 1-3, therearface, oredge pushed towards extreme position (that shown in Fig. 1). The wrench jaws are then caused to engage over a pipe, and the jaws are closed, so that, as shown in Fig. 2, the pipe is almost surrounded by the jaws, and one-half (or more) of the pipes circumference may be grippingly engaged upon the rocking movements of the wrench.

What I claim is;

1. A wrench comprising a handle, a yoke integral with saidhandle, a fixedjaw on the upper endof s'laidflhand'le, a movable jaw having an integral bifurcated shank, an auxiliary jaw havin g an integrally secured shank, said auxiliary jaw being pivotally mounted within the movable ja w' shank, said movable jaw shank slidably embraeing, saidyoke-and pivoted thereto, said auxiliary jaw shank being slidab-ly mounted within said yoke withlimited lateral movement therein;

1 and rack and pawl means to adjustably position saidj'a w's', said rack and pawl being disposed between saidauxiliary :jaw shank and said yoke.

:2.:lA1wrench"comprising a'handle, a yoke in-' tegral withisaid handle,.a fixed jaw on the upper end of said handle, a movable jaw having an integral bifurcated shank, an auxiliary jaw having an integrally secured shank, said auxiliary jaw being pivotally mounted-withinthe movable jaw iawrhein ,piyota lymount Within the m ovable jaw shank being pro-o W,,,I S sa d. vided withl ongitudinal slots in eachof the forks were sa d; ok ha n Outstanding u eitherside thereof adapted to engage the longitudinal slo s in the shank of said movable jaw; said auxiliary jaw shankbeing slidably mounted withinsaid yoke with limited lateral, movement therein; and rackand pawl means to adjustably position saigl jaws, saidrack and pawl being disposed between said auxiliary jaw shank and said STEPHEN UVANEY.

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