Control valve with retained pin for easy valve trim maintenance

Details Control valve with retained pin for easy valve trim maintenance Control valve with retained pin for easy valve trim maintenance

2006-01-31

2006-01-31

Jacyna, J. Casimer (Department: 3751)

Valves and valve actuation

Valve

Removable seat engaging element

C251S077000, C251S086000

Reexamination Certificate

active

06991218

ABSTRACT:
A process control valve includes a valve stem, a valve plug. The valve stem and the valve plug are attached to one another by an arrangement that includes a locking pin that passes through substantially aligned bores in the valve stem and the valve plug. The locking pin is positively retained mechanically and prevented from extending outside of the bores in the valve stem and the valve plug.

REFERENCES:
patent: 3552421 (1971-01-01), Yocum
patent: 3771765 (1973-11-01), Scapes
patent: 3934814 (1976-01-01), Orszak
patent: 4721284 (1988-01-01), Bankard
patent: 416889 (1925-08-01), None
patent: 1 150 051 (2001-10-01), None
patent: 1 150 051 (2001-10-01), None
patent: 1 536 362 (1978-12-01), None
International Preliminary Examination Report in PCT/US03/27493 dated Sep. 8, 2004.
International Search Report in PCT/US03/27493 dated Aug. 1, 2004.
Fisher Type 357 Reverse Valve.

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