Valves with improved actuators

Details Valves with improved actuators Valves with improved actuators

1989-05-19

1990-03-27

Chambers, A. Michael

Valves and valve actuation

Hermetic flexible wall seal for actuator

Bellows

251264, F16K 3100

Patent

active

049114123

ABSTRACT:
A bellows valve comprises a main body defining a valve chamber including a valve seat having inlet and an outlet passages connected therewith. A vlave element is positioned in the chamber and has an operating stem with a free end extending axially therefrom. An actuating assembly for moving the valve element toward and away from the seat, includes a rotatably mounted actuating shaft having a free end axially aligned with the free end of the operating stem and an operator for selectively producing axial movement of the actuating shaft. The operating stem is joined to the actuating shaft by a connection including a first ball member positioned axially between the free ends of the operating stem and the actuating shaft with a spring engaged with the first ball member and acting to bias the free ends of the operating stem and actuating shaft axially apart. A plurality of second ball members interconnect the stem and shaft for preventing axial separation of the free ends while permitting free relative rotation.

REFERENCES:
patent: 1374571 (1921-04-01), Hummel
patent: 1696070 (1928-12-01), Wood
patent: 1890248 (1932-12-01), Edwards
patent: 1892344 (1932-12-01), Huber
patent: 1906313 (1933-05-01), Clifford
patent: 3278156 (1966-10-01), Callahan, Jr. et al.
patent: 3491789 (1970-01-01), Callahan, Jr. et al.
patent: 3787023 (1974-01-01), Shufflebarger et al.
patent: 4166607 (1979-09-01), Webb
patent: 4513779 (1985-04-01), Owoc et al.

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