Fluid control device

Details Fluid control device Fluid control device

1988-01-25

1990-01-09

Rosenthal, Arnold

Valves and valve actuation

Electrically actuated valve

Rotary electric actuator

25112905, 251294, 25112914, F16K 3104

Patent

active

048922862

ABSTRACT:
A modulating valve fluid regulator utilizing a two pole brushless DC motor having the rotor mounted for axial and rotary movement. A poppet is directly carried by the rotor and lifted from the valve seat by a flexible band system which winds upon a mandrel upon rotation of the rotor, or by a cam system having ball bearing cam followers operating on an arcuate cam surface for maximizing torque. Magnetic fields of rotor permanent magnets reacting with the stator core close valve when no electrical power is present to motor.

REFERENCES:
patent: 3425447 (1969-02-01), McCullough
patent: 4097786 (1978-06-01), Lund
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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