Tools – Wrench – screwdriver – or driver therefor – Slidable jaw adjustments
Patent
1991-02-26
1992-04-14
Kisliuk, Bruce M.
Tools
Wrench, screwdriver, or driver therefor
Slidable jaw adjustments
81148, 81150, B25B 1312
Patent
active
051036975
ABSTRACT:
A adjustable open end type wrench having a solid jaw guide that prevents slippage of the movable jaw and relative movement between the jaws thereby virtually eliminating the tendency of such wrenches to loosen under load. The arrangement of this invention replaces the usual worn gear with a wedge and an arrangement that joins the jaw and the wedge through a tension member that passes through or straddles the jaw guide. The jaw guide extends in a direction generally perpendicular to the gripping surfaces of the jaws. The action of the jaw on the wedge pulls the wedge toward the guide and places the guide in compression. Compression on the guide increases the clamping action of the jaw and the wedge and keeps the jaw in place. A relatively simple wedge arrangement will provide the necessary clamping action. Consequently, this invention provides a simple adjustable wrench design wherein slippage of the wedge and consequent loosing of the wrench is essentially eliminated.
REFERENCES:
patent: 1004561 (1911-10-01), Fitzgerald
patent: 1389487 (1921-08-01), Cassel
patent: 1397214 (1921-01-01), Hose
patent: 1427918 (1922-09-01), Stauffer
patent: 1481250 (1924-11-01), Bohn
patent: 1511526 (1924-10-01), Strickler
patent: 1514017 (1924-11-01), Schroeder
patent: 2722150 (1955-11-01), Green
patent: 2948175 (1960-08-01), Bonkowski
patent: 4903556 (1990-02-01), Spirov et al.
Cruz Lawrence
Kisliuk Bruce M.
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