Metal valve stem and sealing system

Details Metal valve stem and sealing system Metal valve stem and sealing system

2007-05-02

2008-09-30

Bastianelli, John (Department: 3753)

Fluid handling

With casing, support, protector or static constructional...

Jacketed

C251S214000, C277S553000, C277S567000

Reexamination Certificate

active

07428912

ABSTRACT:
A metal valve stem seal and sealing system includes a valve body, a metal valve stem housed within the valve body, a bonnet member housed within the valve body, and a U-shaped metal stem gasket positioned between the metal valve stem and the bonnet member. The gasket has a first lip member and a second lip member. The metal valve stem seal and sealing system also includes a metal wedge ring fitted between the first and second lip members and at least one metal energizing spring adjacent the wedge ring. The spring applies a sufficient force to the wedge ring to cause the wedge ring to apply a sufficient contact pressure to the first and second lip members to form a seal between the gasket and the metal valve stem and to form a seal between the gasket and the bonnet member.

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PCT International Preliminary Report on Patentability, PCT/US2004/36827, May 8, 2007.

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