Vacuum regulating valve

Details Vacuum regulating valve Vacuum regulating valve

2008-07-22

2008-07-22

Fristoe, Jr., John K. (Department: 3753)

Valves and valve actuation

Fluid actuated or retarded

Piston type expansible chamber reciprocating valve actuator

C251S063000, C251S077000

Reexamination Certificate

active

11434300

ABSTRACT:
A vacuum regulating valve has a poppet type valve element supported so as to be brought into uniformly close contact with a valve seat disposed in a passage connecting two main ports. The valve element is connected to a valve stem by a connecting mechanism that allows the valve element to tilt relative to the valve stem. A piston included in a cylinder actuator moves the valve stem axially.

REFERENCES:
patent: 4526341 (1985-07-01), Thomas
patent: 5848608 (1998-12-01), Ishigaki
patent: 6478043 (2002-11-01), Ishigaki
patent: 6708721 (2004-03-01), Fukuda et al.
patent: 6814338 (2004-11-01), Kajitani
patent: 6854705 (2005-02-01), Wieder
patent: 6991218 (2006-01-01), Lovell et al.
patent: 08-285132 (1996-11-01), None

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