Pendulum vacuum gate valve

Details Pendulum vacuum gate valve Pendulum vacuum gate valve

2007-09-27

2010-06-08

Bastianelli, John (Department: 3753)

Valves and valve actuation

Fluid actuated or retarded

Flexible wall expansible chamber reciprocating valve actuator

C251S175000, C251S195000, C251S302000, C251S335200

Reexamination Certificate

active

07731151

ABSTRACT:
A pendulum vacuum gate valve comprised of a housing for enclosing a valve plate assembly having a pair of air pressure actuated floating seal plates disposed on opposite sides of the valve plate assembly which is actuated by a gate arm to reciprocate between open and closed positions and intermediate stop positions for controlling gas flow between intake and exhaust conduits connected to the housing.

REFERENCES:
patent: 2476711 (1949-07-01), Edwards
patent: 2705610 (1955-04-01), Hjulian
patent: 2825528 (1958-03-01), Truitt
patent: 4157169 (1979-06-01), Norman
patent: 4343455 (1982-08-01), Winkler
patent: 4381100 (1983-04-01), Schoenberg
patent: 5087017 (1992-02-01), Sawa et al.
patent: 5116022 (1992-05-01), Genreith et al.
patent: 6079693 (2000-06-01), Ettinger et al.
patent: 6561484 (2003-05-01), Nakagawa et al.

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