Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent
1989-01-10
1990-04-17
Fox, John
Valves and valve actuation
With means to increase head and seat contact pressure
With positive reduction
251160, F16K 506
Patent
active
049173545
ABSTRACT:
A dual-action ball valve having a sleeve fixedly mounted within the valve bonnet. Spiral slots are provided in the sleeve for receiving a transverse guide pin mounted in the valve stem. The lower end of the valve stem is provided with sloping cam surfaces cooperating with tapered side walls provided in an apertured insert mounted in the top wall of the ball valve through which the stem extends. A pair of upwardly extending arcuate members are formed on the insert and engage the lower end of the valve bonnet bushing to provide a trunnion for the ball valve. The components of the dual-action ball valve provide increased bearing surfaces to facilitate use of the valve in high pressure systems.
REFERENCES:
patent: 3207468 (1965-09-01), Landucci et al.
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