US1444907A - Wrench - Google Patents

Description

Feb. 13 19 23,

'A- S. FISHER I j WRE Filed June 23 1920 raamearet. 13,1923.

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" E UNITED, STATES PATENT OFFICE.

. ANDREW s. irisrrnn, on nn'roonA, rnnnsrnvanm.

' WRENCH.

Application filed June 9.2, 1920. Serial No. 390,694.

. To all whom it may concerni j Beit known thatlgAnnnnw S. Frsnnn,

, citizen of the United States, residing at Al- 'toona, in the county of Blair and State of,

stantially conform to the minimum span of theotherpair of jaws so that apractically continuousrange of adjustment will be had up .to the maximumspan of the largest, pair ,ofjaws. i

And the invention has as a stillfurther object to provide a wrench wherein thej aw members will 'be slidably connected by an adjusting element therefor and wherein the pair of jaws at either end of the wrench may be moved toward each other and forcibly urged into engagement with a nut by simply shifting said member forwardlytoward the end of the wrench engaged with the work.

Other and incidentalobjects will appear hereinafter. Y i h 1 In the drawings:

Figure 1 is a front perspective View 'of my improved wrench, I

vice,

' Figure 3 1s a the adjusting element of the wrench in detail, and y j Figure 5 is a fragmentary plan view showing the manner in which the, wedge shaped studs of the adjustingelement 5 are adapted to coact with the walls of the slots of the jaw members. i j

In car ng the invention into efi'ect, Iemploy companion jaw members 10 and 11 respectively: Thesejaw members are in the nature of fiat plates and are formed at their ends with slightly ofiset jaws, the jaws at correspondingends of the plates mating so that a pair of jaws12 is provided at one end of the wrench and a pair of jaws 13 at the opposite end of the wrench. As will be observed, the parallel working faces of' thel Figure'Q isan edge elevation of the derear elevation of thewrenoh,

"Figure 4 is a perspective view showing an adjusting element 19 therefor.

jaws 19 are directed obliquely in onedirection with respect to the longitudinal axis of the wrench while the parallel working iaces of the jaws 13 are directed obliquely n the opposite direction, one pair of jaws being shown 1n the present lnstance as formed to receive ahexagonal nut (while the other pair is shown as formed to receive a square nut, As once maybe varied as desired, it being contemplated that the jaws may, within the spirit 1 oi? theinvention, be varlously formed, as, for instance, to provide an alligator wrench. At their outerends, the. jaws of the member 10 are formed with raised thickened portions 14 lyingflush with the upperIfaces of the jaws of the member 11 while at the outer ends of the jaws of this latter memberare formed depending thickened portions 15 ly ,ing flushwith the lower faces of the jaws of the member 10., As-particularlyshown will be at appreciated, this structural detail in Figures 1 and 3 of thepdrawings, the

thickened'portions are formed at their inner transverse edges with oblique undercut shoulders 16 while at thebases of the jaws thej aw members are formed with beveled shoulders mating with the first shoulders. As will be appreciated, these shoulders will tend to prevent separation of the jaws at right angles to the plane thereof. Formed in the jaw member 10 near opposite ends thereof is a pair of obliquelydire'cted slots 17 and formed in the jaw m emb er fl1 is a :pair of similar slots 18 incllnlng in a direction opposite to and intersecting the first slots. a j 1 V Slidably connecting the jawinembers is .This ad j usting element comprises' a body plate which, as shown in Figures 1 and 2, rests flat against the-j aw member 11 at the uppers de of the wrench and is medially provided with laterally directed lugs or ears 2O which as best shown *in Figure 3,, overhang the aw members. Upstanding from the plate near its ends are oppositely directed wedge shaped studs, 21 which: are freely recelved through the intersecting slots 17 and 18 of the jaw members and threaded. upon the upper ends'of said studs arenuts 22 slidably connecting the jaw members with each other as well as'also slidably connecting the adjusting element with said members.

Attention is now directed to the fact, as

particularly brought out in Figure 5, that in practical use.

the sloping faces of the studs 21 will coact with the converging walls of the slots of the jaw members for sliding these members one upon the other when the adjusting element is shifted longitudinally of the jaw members.

Consequently, in the practical use of the.

justing element the bindinga'ction of the aws against the nut will be increasedproportionately so thatthe awe may be caused to securely grip the nut and thus obviate slipping. Due to the wedge shape of the studs, an elongated bearing area is provided between said studs and the walls of the slots 17 and 18 so that mutilation of said walls will be obviated while, at the same time, e3;- treme wedging force tending to move the jaw members inwardly upon each other may be brought to bear upon said members. As will be perceived, closing of the jaws 12 will serve to open the jaws 13'and vice versa closing ofthe jaws 13 wid serve to open the jaws 12. The jaws 13 are somewhat larger than the jaws 12, the jaws 12 being designed, of course' for light work while the jaws 13 are intended for heavy work. Pref erably; the wrench is so constructed that the 1 maximum span of the jaws 12 is, as shown in Figure 8, substantially equal to the minimum span of the jaws 13. By this arrangement a continuous range of adjustment is had from the minimum spanoi": the jaws 12 up to the maximum span of the other pair of jaws. I accordingly provide a highly eflicient wrench structure and a wrench which will'be found particularly serviceable Having thus'descri-bed the invention, what is claimed as new is:

1. A wrench including companion jaw members havlng enacting aws, and an adjusting element at the outer side of one of separation at right angles to the jaws, and

shifting the members transversely and movv ing the jaws relative to each other.

3. A wrench including companion v jawmembers having coacting jaws, one of the j aws being formed with a thickenedportion having a shoulder and the other of the jaws having a shoulder at its base coacting with the first shoulder for securing the against separation at right anglesv to the plane thereof, and an adjusting element at the outer side of one ofthe members slidahly connecting the member-sand movable longitudinally thereof forshii'ting the members transversely and moving the jaws -'relative to each other. g

4:. A wrench including companion jaw members having coacting jaws, and a longitudinally extending adjusting element at the outer side of one of themembers slidably connecting the members and movable longitudinally thereof for shifting the members transversely and moving thev jaws relative to each other, said element having means overhanging the side edges of one of said members whereby when manipulating the wrench said means may be grasped for shitting the jaws. j V

5. A Wrench includingcompanion jaw members havingcoaicting jaws andrprovided with intersecting oblique slots, and an adjusting element slidably, connecting the members and having wedge shaped studs projecting through said slots, saidstuds having fiat sides forming inclined fiat bearing surfaces coa'cting with the oblique walls of said slots whereby. said element may. be shifted longitudinally of the members for moving the aws relative to each other.

6. A wrench including, companion jaw members having coasting j aws; and-a longitudinally extending adjusting element 'at the outer side of one of the members slidabl'y connecting the members and movable longitudinally thereof fo-rfshiftingthe members transversely and moving the jaws relative to each other, said element having ears overhanging theside edges of one of-saidmem- 'bers at a point between the ends thereot whereby when manipulating the wrench said ears may be grasped for shiiiing jaws. j

y In testimony whereof I afiix my s gnature.

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