Driving device for opening and closing a valve

Details Driving device for opening and closing a valve Driving device for opening and closing a valve

1978-01-03

1980-11-25

Schwadron, Martin P.

Fluid handling

With indicator, register, recorder, alarm or inspection means

Position or extent of motion indicator

744248VA, 251113, 251229, 251267, 251297, F16K 3700

Patent

active

042352584

ABSTRACT:
A driving device for opening and closing a valve comprises a cylindrical body, an actuating cylinder, a spindle, a piston member, a transparent plate and a stop means for controlling the rotation of the spindle. Said stop means comprises a ring gear, a spring and a stop bar having a wedge-shaped head, said wedge head having a pair of surfaces forming an included angle which is bisected by the axis of the stop bar such that rotation of the spindle by fluid pressure on the valve is prevented but manual rotation of the spindle in either direction is permitted.

REFERENCES:
patent: 2075443 (1937-03-01), Kirschner et al.
patent: 2930571 (1960-03-01), Vogl
patent: 3184214 (1965-05-01), King
patent: 3298659 (1967-01-01), Cupedo
patent: 3367365 (1968-02-01), Stevens
patent: 3396938 (1968-08-01), Matsui
patent: 3477687 (1969-11-01), Doutt
patent: 3542331 (1970-11-01), Canalizo
patent: 3606801 (1971-09-01), Williams

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