Valve having fast and slow acting closure elements

Details Valve having fast and slow acting closure elements Valve having fast and slow acting closure elements

2006-09-26

2006-09-26

Lee, Kevin (Department: 3753)

Fluid handling

Systems

Flow path with serial valves and/or closures

C137S614190

Reexamination Certificate

active

07111642

ABSTRACT:
A first valve portion and a second valve portion are arranged in series in a flow passage within a valve casing to open and close the flow passage. The first valve portion includes a first valve seat, a first valve element supported to a first valve shaft and adapted to make an axial reciprocating movement into contact with or away from the first valve seat, and an opening and closing drive unit composed of a motor and a motion converting mechanism that converts a rotary motion into a linear motion, the opening and closing drive unit causing the first valve shaft to make a reciprocating movement and capable of effecting a flow rate control and slow valve-opening for the flow passage. The second valve portion includes a second valve seat, a second valve element adapted to move into contact with or away from the second valve seat, a compression spring that urges the second valve element into contact with the second valve seat, and an electromagnetic valve-opening unit for moving the second valve element away from the second valve seat by an electromagnetic force and capable of effecting quick valve-closure for the flow passage.

REFERENCES:
patent: 1587969 (1926-06-01), Ludeman
patent: 3538951 (1970-11-01), Bownass
patent: 4601310 (1986-07-01), Phillips
patent: 5156188 (1992-10-01), Wakita et al.
patent: 6234189 (2001-05-01), Koch
patent: 6848474 (2005-02-01), Sollier
patent: 2005/0005965 (2005-01-01), Amazorrain
patent: 2608579 (1997-02-01), None
patent: 2001-349454 (2001-12-01), None

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