Valve device

Details Valve device Valve device

2009-05-21

2011-11-08

Rivell, John (Department: 3753)

Valves and valve actuation

Valve

Removable seat engaging element

C251S282000

Reexamination Certificate

active

08052119

ABSTRACT:
A valve device includes: a valve housing defining a cylindrical space connected to a high-pressure source, and having a first communication hole open at a valve seat located at a bottom portion of the valve housing and providing fluid communication between the cylindrical space and a low-pressure source; a seal member arranged in the cylindrical space and providing or shutting off fluid communication between the high-pressure and low-pressure sources so that the seal member moves away from or contacts the valve seat; and a stem having an accommodating recess at one end of the stem and moved axially. The seal member is fitted and held in the accommodating recess. The seal member has a second communication hole that provides fluid communication between a bottom face of the accommodating recess and the low-pressure source when the seal member is in contact with the valve seat.

REFERENCES:
patent: 4129284 (1978-12-01), Scapes et al.
patent: 4408632 (1983-10-01), Kent
patent: 5152504 (1992-10-01), Nixon et al.
patent: 6182692 (2001-02-01), Fischer et al.
patent: 6782918 (2004-08-01), Rousselin
patent: 2006-144841 (2006-06-01), None

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