Flexible stem valve

Details Flexible stem valve Flexible stem valve

1975-07-28

1978-04-25

Cline, William R.

Valves and valve actuation

Pivoted valves

251335A, 251261, 13762544, 137872, F16K 1100, F16K 500

Patent

active

040859525

ABSTRACT:
A valve construction in the form of a "flex-finger" or flexible stem valve is provided for handling substances which are highly corrosive or very active chemically. The valve body, valve seats, a valve ball and flexible finger or flexible valve stem are all composed of chemically resistant material. The flexible stem has an outer end secured in the valve body against rotation with a fluid tight joint and an inner end for actuating the "ball". The flexible stem is composed of material which is sufficiently resilient so that it may be caused to travel in a circular or orbital path carrying or actuating a "ball" or other attachment into and out of engagement with the valve seat or seats. For causing such motion the flex stem is made hollow but with the lower end closed to prevent entry of fluid from a valve port, and a bent operating rod is mounted within the hollow space in the flexible stem with a slip fit so that rotation of the outer end of the bent operating rod serves to cause orbital movement of the inner end of the flexible finger without twisting or rotation thereof.

REFERENCES:
patent: 1171189 (1916-02-01), Grandi
patent: 2855000 (1959-10-01), Van Allen et al.
patent: 2912012 (1959-11-01), Klingler
patent: 2928421 (1960-03-01), Nordstrand
patent: 3064941 (1962-11-01), Stromberg
patent: 3176720 (1965-04-01), Donahue
patent: 3498319 (1970-03-01), Schnabel
patent: 3949965 (1976-04-01), Sharples

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