US1713038A

US1713038A - Wrench

Info

Publication number: US1713038A
Application number: US194099A
Authority: US
Inventors: Amos K Ersland
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-05-25
Filing date: 1927-05-25
Publication date: 1929-05-14
Anticipated expiration: 1946-05-14

Description

May 14, 1929. A. K. ERSLAND WRENCH Filed May 25, 192"! INVENTOR K. Era/077d;

1 1 TTORNE Y Patented May 14, 1929.

ll TE STATES lam na Application filed May 25,

llly invention relates to wrenches, and its primu ry purpose the provision of a wrench luwingr the dual i 'u'ruiierties oi a pipe wrench and a nut wrench and quiz-k adjusting means tor the jaws thereof in eitheruse.

it is also the purpose oi? my invention to provide a wrench in which the handli and jaws thereirii act as a compound lever to cause the jaws to positively grip any object plat-ed tlwrebetveen and in proportion to the pressure brought upon the handle, my invention being simple in construction. with the mininnun oi working parts compact in tl orm, strong and durable and quick to adjust.

ll will describe only one form of wrench embodying my invention, and will then point out the novel features thereof: in claims.

ln the accompanying drawings,

l igr. 1 is a View showingin side elevation one term of 'Wl'llltll embodying my invenlion.

Fig.1. 2 is an enlarged View showing the wrench in front edge elevation.

is a View showing the wrench in tudinal section with the jaws thereof in pipe or nut gripping position.

l in. 1- is a fragmentary sectional View similar to Fig. 3, and showing the inner jaw in released position to permit adjustment oi the outer jaw.

hi 5 is a, iriurinentary sectional View similar to Fig. 3, showinp the jaws in none'ripping position with respect to a pipe. .15 Referring specifically to the drawings, my

invention in, its present cmbodimei'it com- )rises hai'idle, the main body of which prelim-ably constructed from a single sheet oi. suitable metal or other material shaped and bent to provide an elongated handle portion 15 ct ti form in cross section, and a. pair of cars 16 spaced in parallelism and comua-ted at their forward edges by an elongated block 17 of metal secured in -5 proper position by rivets 18. .The handle port ion 15 is interiorly provided with a. filler 151 formed of wood or other suitable material with i is inner end in abutting relation. to a metallic block 20, which ilunctions as a spacer, and is seemed in place by rivets 21. lit is important to note that the handle is open at the :lront ends thereof between the

blocks

17 and 20, and at the top between the block 17 and the upper edge of the intermediate part of the handle portion, such parts being extended beyond the handle porism/seri ls).194,099.

tion to serve in connecting the cars 16, but such part terminating short of the upper edges of the ears.

The wrei'ich includes inner and outer jaws designated generally at d and .l respectively, the inner jaw conn risiiur a jaw head. Eli having a toothed working; surface, and iFOIiTMKl on the upper end oil a. tapered shank 23 pivoted on a pin 2 1 secured in the ears 16 so that the shank is capable Oil: pivotal movements between the ears and in the plane thereof. The lower or inner end oi the shank 23 is jlj'i'irn'ied with a toothed projection 25 which constitutes a, pawl adapted for engagement with a rack so formed on the terward end of an elongated shank 9 7 of the jaw J. The jaw .1 includes a jaw head as, the working surface. of which toothed. The shank 27 is slidable, longitudinally between the cars 16, and. it is also capable ot being swoop; in. the plane of the handle through the u'ovision oil the openings in the handle as previously described. in this swinging nuwcmcnt oil? the shank it rides on a rounded head 29 on the upper end of the internualiate part of the handle.

The jaw J is yieldably urged in a counte clockwise direction about the pivot 24; to position the shanks oi both jaws so that the heads 29. and 28 will norn'ially occupy parallel positions. This is ellected llll'flll il jll the inediui'n of a spring 30 riieted at its upper end. to the block 17, while its lower end is time and engages the lower end of the shank 23. By urging the shank in this manner the pawl is biased into engagement with the rack 26 so as to normally look the shank E27, and consia uently the jaw head. 38 in a lixcd position of adjustment. To release the shank 27, so that the jaw J can be adjusted in iii-unmet to its parallel position to the jaw J, the jaw J is moved manually to the position shown in Fig. 41 in which the pawl 25 is moved free 01 the rack 26. As soon as the jaw J is released, however, the spring 30 iiui'ictions to return the pawl to locking position with respect to the rack 26, thercby securing the jaw J in its new position.

In the operation of the wrench when applied to nuts or other angularly shaped objects, the quick adjustment of the jaw J can be ell ected in the manninpreviously described to fit the wrench. to the nut and following such adjustment the jaws will be maintained. in parallel spaced relation during the rotation of the nutin a clockwise direction through operation of the handle. When pressure is exerted on the handle it is transmitted to the shank 27, and subsequently to the jaw J through the intermediate part or back of the handle portion, the jaw J also remaining stationary.

- In the application of the wrench to pipes and other circular objects, the jaws tend to assume parallel positions when turning the pipe through actuation of the handle, but on reversing the movement of the wrench a relative movement occurs between the handle and the jar J, so that the latter assumes the position shown in Fig. 5, in which the jaw head 28 is in divergent relation to the jaw head 22, thus releasing the pipe to permit repositioning of the wrench for further g to effect turning of the latter.

turning of the pipe. As clockwise pressure is exerted on the handle the jaw J tends to return to parallel position with respect to the jaw J, thereby again gripping the pipe From this operation it will be seen that the wrench functions in the true manner of a pipe wrench, yet is capable of being quickly adjusted, and also used as a nut wrench.

Although I have herein shown and described only one form of wrench embodying my invention, it is to be understood that various changes and modifications may be made herein without departing from the spirit of the invention and the spirit and scope of the appended claims.

I claim as my invention:

1. A wrench comprising a handle, an inher jaw having a shank pivoted in the handle to swing in the plane of the handle,

an outer jaw having a shank movable longitudinally in the handle, coacting teeth on the jaw shanks for securing the outer jaw in any position of adjustment longitudinally v on the handle, and a spring for urging the shank of the inner jaw toward the shank of the outer jaw to releasably maintain the teeth in engagement with each other, the shank of the outer jaw adapted to fulcrum on a part of the handle at one side of the inner jaw shank pivot so placed that the, ratio between the jaw arm and the locking arm of the inner jaw is greater than the ratio between the arms formed between the two points of contact of the inner jaw with the outer jaw and the fulcrum point of the outer jaw shank so as to permit the outer jaw shank to be rocked by the inner jaw and yet the inner jaw shank to be moved to a position in which its teeth are out of engagement with the teeth of the outer jaw shank and thus allow longitudinal adjustment of the outer jaw.

2. A wrench comprising a handle, an inner jaw having a shank pivoted in the handle to swing in the plane of the handle, an outer jaw having a shank movable longitudinally in the handle, coaeting teeth on the jaw shanks for securing the outer jaw in any position of adjustment longitudinally on the handle, a spring for urging the shank of the inner jaw toward the shank of the outer jaw to releasably maintain the teeth in engagement with each other, there being a shoulder on the handle positioned to provide a fulcrum point about which the outer jaw shank is adapted to pivot so placed that the ratio between the jaw arm and the locking arm of the inner jaw is greater than the ratio between the arms formed between the two points of contact of the inner jaw with the outer jaw and the fulcrum point of the outer jaw shank to allow the outer jaw in contact with the inner jaw end to occupy a divergent position with respect to the inner jaw and to permit the inner jaw shank to he moved to a. position in which its teeth are out of engagement with the teeth of the outer jaw shank, whereby longitudinal adjustment of the outer jaw is permitted.

AMOS K. ERSLA'ND.