Fluid flow rate control device

Details Fluid flow rate control device Fluid flow rate control device

1989-09-07

1991-06-18

Rosenthal, Arnold

Valves and valve actuation

Electrically actuated valve

Rotary electric actuator

25112905, 251294, 25112914, F16K 3104

Patent

active

050244183

ABSTRACT:
A poppet is modulated between closed and full open positions by a brushless DC motor operating magnetically through a housing to drive a permanent magnet rotor which carries the poppet. The rotor is supported on several parallel cables which are stationarily fixed at one end and attached to the rotor at the other end, whereby rotation of the rotor twists the cables, causing axial foreshortening and axial translation of rotor and poppet. Axial translation is enhanced by placing a spacer between the cables, intermediate their ends. A permanent magnet ring is disposed around the valve seat directly axially attracting the rotor to a valve closed position.

REFERENCES:
patent: 3425447 (1969-02-01), McCullough
patent: 4452423 (1984-06-01), Beblavi et al.
patent: 4613798 (1986-09-01), Baumann
patent: 4723754 (1988-02-01), Torimoto et al.
patent: 4735233 (1988-04-01), Nogami et al.

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