Gate valve

Details Gate valve Gate valve

1994-06-16

1995-05-16

Fox, John C.

Valves and valve actuation

With means to increase head and seat contact pressure

With positive reduction

251204, F16K 316

Patent

active

054153760

ABSTRACT:
A gate valve wherein a valve disc is moved to a position where the valve disc is brought into contact with a valve seat and a position where the valve disc is separated from the valve seat by a driving device provided outside of a valve housing through a valve rod sealingly projected from the inside to the outside of the valve housing. The valve disc is brought into contact under pressure with the valve seat in the valve housing when the valve rod is inclined at the end of the movement of the valve rod. The driving device has piston cylinder devices, a block arranged in side-by-side relationship with the piston cylinder devices and connected to the valve rod, and a device to move up and down and to incline the block.

REFERENCES:
patent: 4560141 (1985-12-01), Bosch
patent: 4721282 (1988-01-01), Shawver et al.
patent: 5002255 (1991-03-01), Sawa et al.
patent: 5120019 (1992-06-01), Davis, Jr.

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