US2491133A - Starting wrench - Google Patents

Description

Dec- 13, 1 B. F. RANDRUP STARTING WRENCH Filed 001;. 27, 1947 VINVENTOR.

Bekjmin Panarup Uu e M W m Patented Dec. 13, 1949 UNITED STAT Es QF C'E- STARTING WRENCH Bcnjamin E2, Itandrup,.hortland flggegi Application Qctober27, 1947;; SerialNo. 782,338

1' Claims. (01. 81-.. 7r):1

My present invention comprises a starting wrench havingpa-rticular utility forstarting bolts into holes in relatively inaccessible localiticSrsuch;

beneath the drainpanswof certain 11104316152 of automobiles.

The principal object of my present invention is to provide a starting wrench which is rugged in construction, which is made of relatively inexpensive and easily formed parts, and which provides a high degree of adaptability to various situations.

The objects and advantages of my present invention will be more readily understood by reference to the following specification taken in connection with the accompanying drawing, wherein like numerals refer to like parts throughout, while the features of novelty will be more distinctly set forth in the appended claim.

In the drawings Fig. 1 is a plan view of a preferred form of the invention;

Fi 2 is a side view of the form illustrated in Fig. 1;

Fig. 3 is a plan view of a modified form of the invention;

Fig. 4 is a side view of the form illustrated in Fig. 3; and

Fig. 5 is a side view of a portion of another modified form of the invention.

Referring to Figs. 1 and 2, the invention comprises a wide, thin blade III beneath one end of which is rotatably mounted a crank disc I I having portions extending beyond the edges of the blade and preferably having an irregular periphery so that it may be rotated between greasy fingers. A second thin, rigid blade I2 is pivotally connected to the lower surface of the crank disc II at a point offset from the center of rotation thereof and on the opposite side of the disc from the first blade Ill. mounted upon the upper surface of the opposite end of blade II], the socket preferably comprising a plurality of spaced, resilient fingers I5 adapted to grip the head of a bolt as illustrated in Fig. 2, the fingers being re-entrantly formed at their outer ends so as to permit engagement of various sizes of bolt heads and to permit the bolt to assume various angular positions with respect to the plane of the blades. The socket I4 is rotatably connected to a thin crank I6 mounted beneath the end of blade Ill and having its free nd connected to the underlying end of blade I2. The intermediate portions of the blades I B and I2 are connected together by a. slidable connection permitting longitudinal movement of one A socket I4 is rotatably 2 withrespecti to the other; such connection pref-- erably comprising a pin H extending upwardfrom blade I2 through a longitudinal slot I8 in' blade in: and having a large head I9- overlying; blade H1 Rotation of di'se II in a clockwise direction by the fingers of one hand while the blade I0 is gripped between the fingers of the opposite hand causes counterclockwise rotation of socket I4, and vice versa. Blade I0 is preferably wider than blade I2 and the crank throw of blade I2 is preferably such that a portion of blade III adjacent disc I I may be firmly gripped to maintain the tool in operating position.

In Figs. 3 and 4 the same principles are employed in a tool wherein the second rigid blade is connected tothe socket through the intermediary of a third rigid blade operating to cause the socket to rotate in the same direction as the crank disc. In this form a first blade 20 has a crank disc 2I rotatably mounted at one end thereof and a socket 22, similar to that previously described, mounted on the opposite surface at the other end thereof. A second blade 23 is connected to the disc 2I at an offset and is provided with a pin 24 at an intermediate point extending through a longitudinal slot 25 in blade 26 and having an enlarged head 26. The free end of blade 23 is connected to a third blade 21 having an intermediate point connected to blade 20 by a pin 28 extending through a longitudinal slot 29 and having a large head 30. The free end of blade 21 is connected to a crank 3| fastened to the socket 22. As seen in side elevation in Fig. 4 the blade 23 is preferably bent between pin 24 and the disc 2I so as to provide for frictionless clearance of the disc 2 I.

In Fig. 5 a modification is disclosed wherein a first blade 40, to which a crank disc (not shown) is rotatably attached as in the other modifications, supports a second blade II which may be similar to blade I2 of the first modification or blade 21 of the second modfication. The blade II is pivotally attached to a crank 42 from which a shaft extends through blade and is fastened to a pinion 43. Pinion 43 meshes with a gear 44 fixed to a socket 45 similar to those previously described. The use of such reduction gearing may be desirable to provide greater starting torque than would be provided by the other modifications.

It is to be appreciated that the blades may be thicker in proportion to their width, or wider than those disclosed. and that a thicker crank disc may be employed, particularly if one of the blades is offset as is the blade 23. Various other modifications in detail and arrangement will readily occur to those skilled in the art. All such modifications as come within the true spirit and scope of the appended claim are considered to be a part of my invention.

I claim:

A wrench comprising a first blade, a crank disc rotatably connected at its center to one end of said blade and lying in a plane parallel to the plane thereof, said crank disc having portions extending beyond the edges of said blade to permit digital rotation thereof, a socket rotatably mounted at the opposite end of said blade and upon the opposite surface thereof from said crank disc, a crank operatively connected to said socket and lying beneath said blade in a planeparallel to the plane thereof, and means operatively connecting said crank disc to said crank whereby rotation of said crank disc produces rotation of said socket comprising a second blade lying in a plane parallel to the plane of said first blade and closely adjacent thereto, said second blade having one end pivotally attached to said crank disc at a point offset from the center of rotation thereof on the opposite side thereof from said 4 first blade and its other end pivotally attached to said crank, and means slidably connecting intermediate points of said blades comprising a pin fixed to one blade and a longitudinal slot in the other blade through which said pin extends.

BENJAMIN F. RANDRUP.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

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