Tools – Wrench – screwdriver – or driver therefor – Sliding jaw – cam-closing
Patent
1996-02-08
1997-08-26
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Sliding jaw, cam-closing
81173, 279 69, B25B 1318
Patent
active
056600887
ABSTRACT:
An adjustable socket wrench with bolt head locking arm for engaging, removing and replacing different size bolts in a work piece. The socket wrench is designed to engage a bolt head at right angles and when locked on the bolt head holding the head with zero tolerance for ease in loosening and tightening the bolt. The wrench includes a wrench body with an upper end portion, a middle portion and a lower end portion. A channel is cut across the width of the upper end portion of the wrench body for receiving a first sliding jaw and a second sliding jaw. The bolt head is received between the first and second jaws. A first jaw guide arm is pivotally mounted on the wrench body with one end of the first jaw guide arm engaging the first jaw. A second jaw guide arm is pivotally mounted on the wrench body with one end of the second jaw guide arm engaging the second jaw. The first jaw guide arm is pivotally mounted to the bolt head locking arm. The bolt head locking arm in turn is pivotally mounted to a first pivot arm. The second jaw guide arm is pivotally mounted to a second pivot arm. The first and second pivot arms are engaged by a tightening nut threaded on the lower end portion of the wrench body. When the tightening nut is threaded upwardly on the wrench body, the first and second pivot arms move upwardly pivoting the first and second jaw guide arms inwardly. The first and second jaw guide arms move the first and second jaws toward each other for engaging a bolt head received therebetween.
REFERENCES:
patent: 4884480 (1989-12-01), Briese
patent: 4911040 (1990-03-01), Km
Crabtree Edwin H.
Margolis Donald W.
Pizarro Ramon L.
Smith James G.
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