US2669147A - Rigid-jaw wrench having jaw-face extensions on offset shank - Google Patents

Description

Feb. 16, 1954 w. M. KOENIG 2,669,147

RIGID-JAW WRENCH HAVING JAW-FACE EXTENSIONS ON OFFSET SHANK Filed March so, 1955 INVENTOR ATTORNEY Patented Feb. 16, 1954 or rice RIGID'-JAW-WRENCH HAVING JAW'FACE EXTENSIONS QN OFFSET'S'HANK,

William M. .Kdenig Webster, ScDaki Application March so, 1953, S'erial'No. 345,459

This invention relates; to. a: novel type of Wrench.

In the-conventional. tractor trackpthertractor belts must be maintained tight on-their respective sprocket wheels and for this purpose there .15

provided' a spring tensioned bolt which from time "to--time-must -betightenedto maintain the parts under tensionand-adjustment: The bolts in the conventional tractor; areso locatedqthat an ordinary wrench cannot be used.:.

The primary object of the. invention is to provide -a-wrench particula-rlysfor use in tightening main tension bolts on endless trackscof a tractor.

A further object of the. invention is to provide a short wrench of integral construction which can be utilized in a-restricted area of such a character that the conventional wrench cannot be utilized; thesshortzintegral wrench being designed for association. with: the conventional ratchet wrench, the wrench'daw'being, offset from the shankstructure to permit the application of the force from the ratchet wrench from a plane above thewrench. jaw.

A further object of "the invention is the provision of an integral wrench structure so designed that the conventional ratchet wrench may be utilized in a manner permitting any angular position between the pull handle and the nut engaging head.

Other features of the invention will more clearly hereinafter appear by reference to the accompanying drawings forming a part of the instant application and in which like characters of reference designate corresponding parts throughout the several views, in which:

Fig. 1 is a top plan view of the wrench in engagement with a nut and having the conventional ratchet wrench associated therewith;

Fig. 2 is a side elevation of the structure of Fig. 1 showing associated parts of an endless tractor belt;

Fig. 3 is an end view of the structure of the assembly; and

Fig. 4 is a perspective view of the invention.

The wrench structure is of integral form and includes a rigid head I shaped to receive a nut or bolt B of hexagonal form, although it will be obvious to one skilled in the art that a Workengaging recess 2 of the wrench head may have a suitable number of Walls so as to receive a bolt 4.,Claims. (Cl.i 81--119) or nut {head :of ':other: shape ordesign; A shank 3 forrtheawrenchrheadrl includes a forwardextensionrwhiclroverlies the top. medial portion ,of the head i and terminates flushwiththerecess in inclined-or outwardly diverging faces .4 which lie: in the-planesof the underlying walls or workengaging; faces of the; Wrench head 1 so thatfree passageof the wrencht headgonto. the nut Bis provided; The forward superimposed endof the shank 3-is welded or otherwise formed as an-integralpart of'the wrench. head- I with the end faces of theshan-k vertically. aligned-or coplanar withzadjacenttfaces of the wrench head as heretofore: described: The shank: 3 of i the wrench head-1 extends rearwardly with its upper surface in ahorizontal plane, and adjacent an outer'end 5?;thereof a socket: l ,l .is. provided-for the reception ofa; shank-,1 2- of awconventional ratchet wrench A1170 :be hereinafter, described:

The: shank'istructure 3;-is substantially. thickened medially at 6 to provide a forward shoulder l, which abuts the Wrench head land is; welded thereto;andya;rearwardshoulder 9; the latter beingispacedizsufliciently inward from the outer end 5' lof;the,shanl ;to. clear intervening wall parts,

such: as: shown, atv [0. The provision of*the thickened medialportion 6.:ofthe wrench shank 3i while providing an extremely rigid torque. transmitting; body.isssorv constructedi and arranged. as to clear the inner face of the part 10 so that the wrench can be swung on the axis of the nut without striking the inner face of the wall [0 by application of the reversible ratchet wrench structure A. The ratchet wrench A includes the usual shank and wrench head, the wrench head l4 including conventional reversible mechanism indicated generally at l5. It will be understood that the ratchet wrench A, in itself, forms no part of the instant invention, the invention being comprehended by the integral wrench structure and being designed for association and use with a ratchet wrench.

The illustrations of the instant invention embody its use in association with the nut head B on the bolt 12 which comprehends a tensioning bolt used in tightening the track links of an endless track and in such installations the machine frame embodies a wall structure or element illustrated and indicated generally at II]. This arrangement obviously prohibits the use of any long shanked wrench structure and requires the offset superimposed relation between the wrench head i and the ratchet head [4 for the application of necessary forces in the rotation of the nut B. It will be obvious to one skilled in the art that the structure may be used not only as a special tool in the tightening of tensioning bolts of endless tracks for tractors, but could be used in other assemblies embodying the same association of parts and the structure also permits a reversing of the wrench unit in instances where the parts are oppositely positioned from the arrangement illustrated in the instant drawings.

It will be noted that the wrench head I includes inwardly projecting extremities I which partially embrace the outer faces of the nut B as viewed from the top plan View of Fig. 1, these extensions l increasing the area of engagement between the wrench head I and the nut B and preventing separation of the associated parts during operation, as well as increasing the working surfaces of the parts. It will also be noted that the end faces a of the shank add to the areas of the working faces between the wrench and the nut and tend to maintain the wrench head i on the nut B against rotational movement which might be present due to the inconvenient arrangement of the work and necessary angle of operation because of this arrangement.

By the proposed construction applicant has provided a novel device of great strength and sturdiness which is capable of use in tightening the tension bolts of the endless tracks of tractors by means permitting control of the operation and thus enabling the proper tension to be applied on the structure, it being obvious that the ratchet wrench shown at A may be in the nature of a tension wrench whereby predetermined tension may be applied should this be found desirable. It will also be obvious to one skilled in the art that the wrench embodies maximum strength and at the same time provides an offset position for the operator so that the operator without inconvenience can accomplish his work and apply to the tension bolt direct forces to accomplish the required result.

What I claim is:

1. In a wrench for use in tightening tension bolts for endless tracks for tractors, a shank member having a downwardly depending shoulder adjacent one end, a wrench head formed rigidly with the shank and having one of its faces abutting said shoulder and Welded thereto, the end faces of said shank terminating flush with work-engaging jaw portions of said wrench head, an outer end portion for said wrench shank having a socket for receiving a wrench part, and the medial portion of said shank being relatively thick and extending substantially below the outer end portion of said shank.

2. In a wrench structure including an elongated shank, said shank having a medial depending thickened portion defined by shoulders, a wrench jaw rigidly fixed to a bottom face of said shank at one end and abutting one of said shoulders, and an operating part for said shank superimposed upon the other end of said shank.

3. In an integral wrench structure including a jaw and a shank, said shank having one end overlying a medial portion of said jaw and terminating flush with work-engaging faces of the jaw, said shank including a thickened medial portion formed by a portion lying below an upper face of the jaw, and means for operating said wrench superimposed above said shank at its outer end.

4. In a wrench including a jaw and shank, said jaw being formed with a recess to provide walls for engaging all of the faces of an associated nut, said shank being formed with a forward shoulder adjacent one end, said shoulder abutting an outer face of the wrench jaw and the end of said shank terminating flush with the recess and lying in the plane of certain Walls of the recess, said shank including an elongated medially thickened portion terminating in an outer shoulder, the outer extremity of the shank being adapted to be engaged by an operating part.

WILLIAM M. KOENIG.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,597,785 Grant Aug. 31, 1926 1,924,089 Groessant N Aug. 29, 1933 2,420,132 Gryniuck .a May 6, 1947 FOREIGN PATENTS Number Country Date 24,036 Australia Aug. 20, 1935 879,917 France Dec. 10, 1942

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