US2382074A - Wrench - Google Patents

Description

Aug; 14,1945. I A. c. LEIS'ENRING 2,382,074

WRENCH Filed Oct.- 4, 1943 V Patented Aug. 14, 1945 UNITED STATES PATENT "DFFICE WRENCH ArthurrC. Leisenring Denver, Colo. Application October 4, 1943, Serial No. 504,973

1 Claim.

This invention relates to a socket wrench, and has for its principal object the provision of a socket Wrench which can be used in exceedingly close quarters, where adjacent structures are so close to the wrench faces that an ordinary socket wrench can neither be inserted over the nut or bolt, nor rotated after insertion.

Other objects and advantages reside in the detail construction of the invention, which is designed for simplicity, economy, and efliciency.

- These will become more apparent from the following description.

In the following detailed description of the invention reference is had to the accompanying drawing which forms a art hereof. Like numerals refer to like parts in all views of the drawing and throughout the description.

In the drawing:

Figs. 1 to 4 inclusive, illustrate successive positions of the improved socket wrench while being used to rotate a typical bolt head.

Fig. 5 is an edge view of the improved wrench.

Fig. 6 is a vertical section, taken on the line 66, Fig. 1.

Fig. '7 is a-face view of a simplified form of the wrench; and

Fig. 8 is an edge view of the simplified form.

A typical bolt head has been indicated at 9 for illustrating the action of the improved wrench.

The wrench consists of a wrench block In provided adjacent one extremity with a round bolt head or nut receiving socket I I for the reception of the bolt head 9, and adjacent the other extremity with a wrench socket I2 of any suitable shape, other than round, for the reception of a standard socket wrench bar. A boss [9 is formed on the latter extremity containing a threaded socket 20 for the attachment of a suitable handle if desired. Two dog pockets I3 are formed adjacent to the bolt socket H and both open to the latter. Ratchet dogs l4 and I5 are mounted in the two sockets ll, upon suitable shanks I! which slide in guide holes 2|. The shanks l1 are threaded into the dogs. A suitable screw driver slot being provided as illustrated. Compression springs l6 positioned about the shanks of the dogs I 4 and [5 act to continually urge the dogs against the end walls of the pockets I3.

It will be noted that the two dogs l4 and I5 move on axes at right angles to each other, and, when in their fully extended position, the top faces of the dogs will be positioned at right angles to each other on planes intersecting the may be used to rotate it one face distance.

axis of the bolt 9. For convenience in describing the operation of the improved wrench, a radial line A has been extended from the bolt [9 to show the relative positions of the latter.

It will be noted that in Fig. l, the dog I5 is engaging one of the faces of the bolt head l9 so that when the wrench is rotated in the direction of the arrow in this figure, the bolt l9 will be rotated to the position of Fig. 2.

The direction of the rotation of the wrench is now reversed as shown by the arrow in Fig. 2, until the second dog [4 snaps past the projecting corner between two Wrench faces, and assumes the position of Fig. 3.. If the wrench be now rotated as shown by the arrow in Fig. 3, the bolt I9 will be again rotated to the position of Fig. 4. The direction of rotation is again reversed, as shown by the arrow in Fig. 4, until the first dog I 5 snaps past the adjacent corner of the bolt head, and again assumes the position of Fig. l.

The corner edge of both dogs where they contact the bolt head are slightly rounded, as shown at I 8, to facilitate the passage of the dogs over the bolt head corners on the reverse movement.

It will be noted that, although the bolt has only six wrench faces, two strokes of the wrench In other words twelve strokes (of 30) can be used for each complete rotation of a. hexagonal bolt or nut so that the latter can be rotated in very restricted positions. It is desired to call attention to the very thin wall surrounding the bolt socket II on the side opposite the dogs l4 and I5. This enables the wrench to be slipped over bolts, nuts or screws such as the cylinder base screws of aircraft engines where the adjacent wall is very close to the screw heads.

In Figs. 7 and 8, a simplified form of the wrench is illustrated consisting of a wrench block 22 provided at one extremity with a round bolt socket 23, and at its other extremity with handle sockets 24 and 25. In this form only a single dog 21 is provided mounted on a guide shank 28, and actuated by a compression spring 29 similar to the previously described form. The guide stud 28 slides within a guide hole 30. The dog 21 is formed with a rounded corner 3| to facilitate its passage over the bolt corners on the reverse movement. This form of the wrench operates exactly as the previous form, except that only six strokes can be obtained per revolution on a hexagonal head in place of the twelve strokes of the previous form.

It will be noted that when a dog is engaged in rotating a bolt or nut the reactive thrust thereof been described and illustrated herein, it is de- 5 sired to be understood that the .same may be varied, within the'scope of the appended claim, without departing from the spirit of the invention.

axis of said nut receiving opening, there being a guide hole extending through the rearward end Wall of said pocket to the exterior edge of said block; a square dog slidably mounted in said pocket with one of its sides engageable with said for-ward end wall and having a rounded corner portion and a side extending into said nut receiving opening to engage the nut, the width of said dog being equal to the thickness of said av g thus described the invention, what is 10 bloc]; so that its sides will align with the sides of claimed andfde'siredsecured by Letters Patntis:

A wrench comprising: a wrench block provided with a rounded nut receiving opening extending through said block; a rectangular dog pocket -"said"block;"-- a spring urging the front face of said dog against said" end wall of'said pocket; and a slidable guide shank inserted from the exterior or said vblock through said guide hole and through opening to said receiving opening and also "ex-' i ls 'said spring to a threaded conectiou with the rear tending entirely through said block soas to, be open at both sides thereof, said pocket having-a forward end wall lying in aplane radial 'to the 7 face of said dog to prevent the latter from falling"th'rou'gh"t'he open sides of said pocket.

' C. LEISENRING.

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