Valves and valve actuation – Fluid actuated or retarded – Piston type expansible chamber reciprocating valve actuator
Reexamination Certificate
2005-03-30
2009-02-24
Bastianelli, John (Department: 3753)
Valves and valve actuation
Fluid actuated or retarded
Piston type expansible chamber reciprocating valve actuator
C251S175000, C251S195000, C414S935000
Reexamination Certificate
active
07494107
ABSTRACT:
An isolation valve is preferably applied to the semiconductor industry for sealing a process vessel and also operates effectively at plus-atmospheric pressures. A double containment gate valve assembly includes a housing and a movable head assembly within the housing. The housing includes a first access opening and a second access opening. The head assembly is configurable into a first position where an access path through the first and second access openings is clear, and a second position where the access path is blocked.
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Sheydayi Alexei
Sutton Thomas
Bastianelli John
Haverstock & Owens LLP
Supercritical Systems Inc.
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