Ball valve housing

Details Ball valve housing Ball valve housing

1981-12-30

1984-04-24

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Rotated operator

E21B 3412

Patent

active

044442670

ABSTRACT:
An improved valve member retention assembly comprising a cage assembly containing the lower valve seat and spherical valve member therein.

REFERENCES:
patent: 4210207 (1980-07-01), McStravick et al.
patent: 4352366 (1982-10-01), Fisher, Jr.
patent: 4372392 (1983-02-01), Barrington et al.

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