Valves including thermally sprayed sealing components

Fluid handling – Systems – Multi-way valve unit

Reexamination Certificate

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Details

C137S625310, C251S368000

Reexamination Certificate

active

07004197

ABSTRACT:
A valve assembly comprising a valve stem, an annular bonnet configured to receive the valve stem, a valve disk coupled to one end of the valve stem, a seal, and an insert. The seal is disposed adjacent the valve disk and has a top surface and a bottom surface. The top surface includes a first pair of sealing ridges extending upwardly therefrom and the bottom surface includes a second pair of sealing ridges extending downwardly therefrom. The insert includes a recess configured to receive the seal that performs a sealing function and a biasing function. The valve assembly can easily be configured to open in either a clockwise or counterclockwise direction without resort to adapters or other additional pieces by rotating the bonnet/valve stem sub-assembly 90° relative to the insert.

REFERENCES:
patent: 4725508 (1988-02-01), Rangaswamy et al.
patent: 4935313 (1990-06-01), Knapp et al.
patent: 5107884 (1992-04-01), Orlandi
patent: 5633094 (1997-05-01), Takeshima et al.
patent: 6247496 (2001-06-01), Ko

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