Ball valve

Details Ball valve Ball valve

2006-09-19

2006-09-19

Jacyna, J. Casimer (Department: 3751)

Valves and valve actuation

Rotary valves

Seat or interface seal

C251S315010, C251S315100

Reexamination Certificate

active

07108243

ABSTRACT:
A ball valve includes a housing, a valve member, and a grip. The housing has a valve chamber in the center portion for containing a valve portion of the valve member consisting of the valve portion and a shaft portion extending up from the valve portion and out of the housing to combine with the grip able to rotate the valve member to open or close a passageway formed by the cavity of the valve portion, an inlet portion and an outlet portion at two sides of the housing. An anti-leak gasket is fixed around the lower end of the shaft for preventing liquid in the valve assembly from leaking out. Further, a soft auxiliary gasket is fixed around the shaft portion under the anti-leak gasket for lessening friction between the shaft portion and the shaft hole of the housing to permit the ball valve manually handled to open or close smoothly.

REFERENCES:
patent: 3157190 (1964-11-01), Allen
patent: 3501128 (1970-03-01), Pool
patent: 4602762 (1986-07-01), Koch et al.
patent: 4637421 (1987-01-01), Stunkard

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