Motor operated valve apparatus

Details Motor operated valve apparatus Motor operated valve apparatus

1998-09-21

2000-05-09

Ro, Bentsu

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

318666, 25112912, F16K 3104

Patent

active

060608560

ABSTRACT:
DC motor-driven valve apparatus, comprising, in combination a valve unit having fluid input and output porting, the valve unit having a valve shaft rotatable between primary and secondary positions corresponding to different flow states; a reversible DC motor having a rotatable output shaft, gearing connected in the drive path between the motor output shaft and valve shaft, such that the ratio of motor shaft rotation to valve shaft rotation is in excess of 100; and circuitry including a potentiometer operatively connected to the valve shaft and to the motor to provide an output signal which varies with degree of valve shaft rotation for reversibly controlling the motor to terminate motor shaft rotation when the valve shaft alternately reaches the primary and secondary positions.

REFERENCES:
patent: 2761331 (1956-09-01), Buescher
patent: 3824439 (1974-07-01), Pinckaers
patent: 3914676 (1975-10-01), Madonian et al.
patent: 4000663 (1977-01-01), Tyler
patent: 4132071 (1979-01-01), Priese et al.
patent: 4139355 (1979-02-01), Turner et al.
patent: 4422619 (1983-12-01), Griffiths
patent: 4899097 (1990-02-01), Chapman
patent: 5098063 (1992-03-01), Ronzon
patent: 5152308 (1992-10-01), Koch
patent: 5226454 (1993-07-01), Cabalfin
patent: 5461290 (1995-10-01), Tice

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