Dynamic double action valve

Details Dynamic double action valve Dynamic double action valve

1990-11-08

1992-04-21

Schwadron, Martin P.

Valves and valve actuation

Mechanical movement actuator

Screw

74531, 744248B, 1376142, F16K 3144

Patent

active

051060558

ABSTRACT:
A valve includes a hollow body having both a valve seat, and a threaded portion having helical right-handed threads. A stem disposed within the body has a threaded portion at one end, with left-hand threads. The stem is moved within the body by turning a cap assembly which has both a left-hand threaded portion engaging the threaded portion of the stem, and a right-hand threaded portion engaging the threads on the valve body. Large stem displacements per turn are realized.

REFERENCES:
patent: 3409271 (1966-05-01), Kallenbach
patent: 4483512 (1984-11-01), Drapeau
patent: 4601310 (1986-07-01), Phillips
patent: 4687181 (1987-08-01), Simonelli et al.
patent: 4907780 (1990-03-01), Phillips
patent: 4917355 (1990-04-01), Dark et al.

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