Valve handwheel wrench

Details Valve handwheel wrench Valve handwheel wrench

1990-01-16

1991-02-12

Schmidt, Frederick R.

Tools

Wrench, screwdriver, or driver therefor

Spanner

811761, 8117615, B25B 1348

Patent

active

049914693

ABSTRACT:
A device for safely rotating the handwheel of hard-to-turn valves has an elongate handle terminating in a fixed wheel-rim-engaging jaw. A movable wheel-engaging jaw is pivotally attached to the handle behind the fixed jaw. When the movable jaw is applied to the inner surface of the handwheel rim and the fixed jaw is applied to the outer surface of the rim, turning force on the handle forces the two jaws together by a leveraged force to enhance gripping of the rim while turning the wheel. Protuberances on the movable jaw enhance gripping the wheel rim and spoke.

REFERENCES:
patent: 2086722 (1937-07-01), Matuella
patent: 2357562 (1944-09-01), Thom et al.
patent: 2539262 (1951-01-01), Moore
patent: 2682189 (1954-06-01), Bergman
patent: 3482476 (1969-12-01), Tanksley
patent: 3641846 (1972-02-01), Prial
patent: 4715252 (1987-12-01), Pella
patent: 4848194 (1989-07-01), Santorineos

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