Fluid flow regulating valve

Details Fluid flow regulating valve Fluid flow regulating valve

1992-11-12

1993-10-05

Michalsky, Gerald A.

Valves and valve actuation

Electrically actuated valve

Rotary electric actuator

251122, 251227, 251903, 261DIG38, F16K 104, F16K 3104

Patent

active

052497739

ABSTRACT:
The stem of a needle valve for regulating fluid flow is threaded into the valve housing. A reversible electric motor, whose shaft engages the stem coaxially, rotates the stem and causes it to move the plug on the end of the stem into and out of a fluid flow port. A helical spring slidably located in a longitudinal bore in the stem is compressed by the shaft to urge the stem toward the housing in order to maintain a working threadable connection between the stem and the housing even when the stem is almost completely withdrawn.

REFERENCES:
patent: 1392141 (1921-09-01), Giesler
patent: 2958504 (1960-11-01), Lindgren
patent: 3813877 (1974-06-01), Hunt
patent: 3899552 (1975-08-01), Bauer
patent: 3981284 (1976-09-01), Gospodar
patent: 4075296 (1978-02-01), Orsini et al.
patent: 4167547 (1979-09-01), Takamuru
patent: 4229387 (1980-10-01), Rogerson
patent: 4407248 (1983-10-01), Takeuchi
patent: 4463724 (1984-08-01), Fukaya
patent: 4685434 (1987-08-01), Ando
patent: 4969628 (1990-11-01), Reich
patent: 4976404 (1990-12-01), Ichikawa
patent: 5033433 (1991-07-01), Churchill et al.

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