Vacuum gate valve

Details Vacuum gate valve Vacuum gate valve

1992-02-26

1993-12-21

Schwadron, Martin P.

Valves and valve actuation

Hermetic flexible wall seal for actuator

Bellows

251326, 251328, F16K 318

Patent

active

052716023

ABSTRACT:
A vacuum gate valve device having a vacuum path includes: a valve casing; a valve body provided in the valve casing, the valve body being allowed to reciprocate between two positions to close and open the vacuum path; a bonnet flange for closing the casing; driving member provided on the bonnet flange for reciprocably driving the valve body, the driving member having a stem shaft which is loosely inserted into a through hole of the bonnet flange and is coupled with the valve body; and a member for isolating a sliding portion of the stem shaft from the vacuum path.

REFERENCES:
patent: 2856151 (1958-10-01), Peters
patent: 3179372 (1965-04-01), Vaudreuil
patent: 3413990 (1968-12-01), Gachot
patent: 4483514 (1984-11-01), Kennedy
patent: 4531539 (1985-07-01), Jandrasi et al.
patent: 4694634 (1987-09-01), Anderson
patent: 4809950 (1989-03-01), Geiser
patent: 4921213 (1990-05-01), Geiser
patent: 5058861 (1991-10-01), Baumann

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