Gate valve and cylinder apparatus

Details Gate valve and cylinder apparatus Gate valve and cylinder apparatus

1998-04-06

1999-08-10

Fox, John

Valves and valve actuation

With means to increase head and seat contact pressure

Gate valve

251203, F16K 316

Patent

active

059346469

ABSTRACT:
A gate valve in which the structure is simplified and inexpensive, movement of a valve body is smooth and high in speed, a force of inclination moving the valve body is strong, and a sealing property of an opening portion can be improved. The gate valve has a valve body capable of sealing the opening portion; a valve rod to which the valve body is fixed; a roller rotatably provided on the other end portion of the valve rod; a roller receiving member having a first holding portion for holding the roller when the valve rod moves the roller straight, an inclined surface for inclining the valve rod, and a second holding portion for holding the roller when the valve rod is inclined up to a predetermined angle; a driving means for moving the roller receiving member straight; and stoppers limiting the straight movement of the valve rod at predetermined positions at which the valve body closes the opening portion. This gate valve is preferably driven by the cylinder apparatus.

REFERENCES:
patent: 5120019 (1992-06-01), Davis, Jr.
patent: 5626324 (1997-05-01), Nakamura et al.
patent: 5755255 (1998-05-01), Iwabuchi

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