US1596664A - Wrench - Google Patents

Description

Aug. 17 1926.

W. C. KISNER WRENCH I Filed May 1925 I EL m m m MW m N 7 If u fi W 3 Patented Aug. 17, 1926.

1,595, 64 W Witter...

WILLIA c! Kremlin, a was wast viaemm wnE cH.

Application filed Ma a,

This invention relates broadly to wrenches, and more specifically to a wrench of ratchet type. i

The primary object of the invention is to provide a wrench having a relatively ad justahle j aw structure and having one of its jawsshiftable away from the opposite jaw under the forcewhich' is exerted thereon in returning'the wrench, to an initial position for obtaining a new hold. j A further. object is, to provide a simple and practical wrench which functions inthe manner of 'ordinary forms of ratchet wrenches and which, 'atthe same time,'i s adjustable to accommodate itself to nuts of different sizes. In describingthe invention in detaihreferonce is herein had to the accompanying drawings, in which "Figure 1 is a side elevation of a wrench constr .cted in accordance with my inven tion; the same being shown in rotating relation' to a nut; i

Figure 2 is a similar view showing the wrench being reversed over'the nut to obtain a new hold; and

Figure 3 is a section taken on line 33, Fig. 2.

Referring to said drawings, 1 indicates the wrench head which is pivotally mounted upon a tongue 2 of reduced thickness formed on the front end portion of a. wrench handle 3, said head having in its rear end a recess or transverse slot at within which said tongue 2 is received. Said wrench head 1, which is of materially greater width at its front end than at its rear, or pivoted, end, has extending therethrough adjacent to its said front end a transverse bore or way 5 which opens outward through the face of said front end in the form of a relatively narrow slot 6.

The bore 5 constitutes a guideway in one end of which is disposed for transverse sliding movement a rack-bar 7 formed upon a movable jaw 8, the teeth of said rack-bar being engaged with a worm 9 which is located within and has opposite portions of its periphery protruding from opposite sides of an opening 10 in said head 1. Said worm is mounted for rotation upon a pin 11 which crosses said opening 10, as shown.

A notched member 12 carried by a second jaw 18 is) disposed for sliding movement in the opposite end of the guideway 5, said jaw 13 being located in opposed relation to the adjustable jaw 8. A flat resilient steel spring substantially 1925; Serial no. 28,807.

1 1- is disposedwith its free end against'the its outer end pivotally mounted in a recess or channel-17"*prov ded therefor in an arm 18 which is fixed ta'or formed integral with,

the wrench handle 3 andwhich forms a fixed or m'oveme'nt-limiting" abutment against which the ad acent edge portion of thehead 1- andthe spring 14: normally rests, as shown in F 1. fSaid head is normallyheld in seated relationto said armorsbutment by neansof aflat resilientsteel spring 19 which is attached to the handle '3 and has its free end portion seated againstthe edge portion of said head opposite that which'bears the spring 14. V

The dog is longitudinally movable into and out ef engageinent with' 'the notch 16 through holes 20, and '21 provided therefor in the spring 14: and the head 1, said hole 21 extending at substantially a right angle to the bore 5.

In practice, by rotation of the worm 9, the jaw 8 is adjusted to position it at the proper distance from the normally stationary jaw 13 for grasping the part, as the nut 22, to be rotated, as shown in Fig. '1. The wrench is then rotated forward in the direction indicated by the arrow in said ure. In such forward rotation the jaw 13 is maintained against movement in an outward direction both, by the pin 15 engaged. with the notch 16 and by the arm 18 which is then abutted by a portion of said jaw.

Following the advance rotation described, or when the wrench is to be returned to obtain a new hold on the nut, the return movement may be effected without disengaging the wrench from the nut, or in the manner of a ratchet wrench. When the wrench handle 3 is so returned in the direction indi cated by the arrow in Fig. 2, the force exerted to effect rearward movement of the jaws with respect to the stationary nut 22 acts to produce relative movement between the said handle and the head 1, the former turning on the connecting pivot pin 28 against the pressure exerted by the spring 19, so that the said parts occupy approximately the relative positions shown in said figure. Additionally,- as the arm 18 is withdrawn from Said aw, so released, is then capable of-out' ward movement against the slight pressure exerted by the spring 14 to the extent that it may abut the arm 18 in the then withmovement of the jaw 13 is induced as the i latter passes over theangular edges of the then stationary nut in the-rearward rotarymovement of the wrench, as shown 1n F g. 2. The spring 14 acts to'return said jaw to its normal position following the passageof the latter'over said angular edges. 'When the wrench comes to rest following the rear ward movement thereof, the parts resume their normal positions shown in Fig. 1,

lVhat is claimed'is e; Q 1. A wrench comprising a handle, a head attached pivotally to said handle to permit relative lateral movement, an arm carried by said handle in a position-to limit the extent of said movement in one direction, resilient a means normally holding said head in abutting relation to said arm, ajawmounted on saidhead and shiftablevtransverselyjof the latter, a dog for normally holding said jaw stationary, said dog being movable into and movements of said head away from and toward said arm, a second jaw carried by said head'in opposing relation to the first mentioned jaw, a rack-bar formed integral with said second jaw, said head having a transverse guideway in which said rack bar is "sli dable and an adjusting worm engaged M I with said rack-bar. drawn position of the latter. The outward 2. A wrench comprising a handle, a head attached pivotally to said handle to permit relative lateral movement, anarm carried by said handle in a position to limit the extent of said movement in one direction, resilient means normally holding saidihead in abutting relation tosaid arm, a jaw mounted on said head and shiftable transversely of the latter, a dog fornormaily holding said jaw stationary, said dogbeing pivotally mounted on said arm and said head having therein anopenmgthrough which said dog is movmounted on said head, and-means for adjusting said second'jaw relative to the first ment oned aw.

v Intestimony whereof, I affix my signav ture, t Y Y i out of operative relationto said jawtwith 'wILLiAM o. KISNER.

6'0 able into and out of holding relation to said a "13W w th movements of said head away from and toward said arm, a; spring normally

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