Tools – Wrench – screwdriver – or driver therefor – Attachment – or including adjunct or replaceable portion
Patent
1994-07-15
1996-06-25
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Attachment, or including adjunct or replaceable portion
811772, B25B 1358
Patent
active
055289649
ABSTRACT:
A torque multiplying assist tool engages and pivots about a fulcrum to assist a conventional wrench in operating upon a work-piece. The assist tool functions as a secondary lever by receiving an applied force, pivoting about the fulcrum, and exerting a multiplied force upon the wrench. The wrench includes a grip element that is engaged to the work-piece and a handle extending from the grip element. The multiplied force is applied by way of a linkage assembly to the handle of the wrench causing the wrench to pivot such that torque is applied to the work-piece. In accordance with the preferred embodiments of the present invention, the assist tool is constructed and arranged to cooperate with the wrench to aid in the removal of a lug nut from a vehicle wheel. The work-piece is a lug nut (i.e., a primary lug nut) on the wheel and the fulcrum is another lug nut (i.e., a secondary lug nut) on the same wheel. The assist tool includes a pivot assembly for engaging and pivoting relative to the secondary lug nut and a handle extending from the pivot assembly. In accordance with the first preferred embodiment of the present invention, the linkage assembly extends between the handle of the assist tool and the handle of the wrench, and the wrench is a conventional ratchet wrench. In accordance with the second preferred embodiment of the present invention, the linkage assembly extends between the pivot assembly of the assist tool and the handle of the wrench, and the wrench is a conventional lug wrench. In alternate embodiments an assist tool and wrench are joined so that they remain assembled to one another and generally properly oriented with respect to each other for convenient deployment as a single unit. An improved lug wrench is provided in another alternate embodiment.
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Isaf Louis T.
Smith James G.
Witherspoon James A.
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