Tools – Wrench – screwdriver – or driver therefor – Rigid jaws
Patent
1994-01-14
1995-08-15
Kisliuk, Bruce M.
Tools
Wrench, screwdriver, or driver therefor
Rigid jaws
811761, B25B 1348
Patent
active
054409560
ABSTRACT:
A unidirectional shutoff tool for closing a gas valve, having a valve stem with a rectangular profile extending from the gas valve. The tool has a head and a handle extending from the head to accommodate the application of leverage to the head. A rectangular receptacle is formed in one face of the head and has two diametrically opposed corners for engaging corresponding corners of the valve stem in order for the tool to be used to rotate the gas valve to the closed position. The receptacle is characterized by the absence of corners that could otherwise be used to engage corresponding corners of the valve stem thereby preventing the tool from being used to open the gas valve. The head is angularly offset from the handle to provide an ergonomically acceptable configuration for the tool. The head is also placed in a plane parallel to but spaced from the plane of the handle in order to adapt the placement of the receptacle over the valve stem in the absence of interference between the tool and the gas valve, the gas line, the gas meter, and the like.
REFERENCES:
patent: 726782 (1903-04-01), Stone
patent: 1424069 (1922-07-01), Blackmar
patent: 1424178 (1922-08-01), Noyes
patent: 3010346 (1961-11-01), Kulp
patent: 4715252 (1987-12-01), Pella
patent: 5271300 (1993-12-01), Zurbuchen et al.
Danganan Joni
Kisliuk Bruce M.
Young J. Winslow
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