Electrically driven flow control valve assembly

Details Electrically driven flow control valve assembly Electrically driven flow control valve assembly

1982-02-18

1984-03-20

Capossela, Ronald C.

Valves and valve actuation

Permanent or constantly energized magnet actuator

251139, F16K 3108

Patent

active

044376456

ABSTRACT:
A control valve assembly of the type in which a slide valve is driven along a hollow iron core by a linear motor to control the degree of communication between an inlet port and outlet port through the hollow interior of the iron core. A valve hole is provided in the slide valve so as to overlap a communicating hole formed in the iron core. When the linear motor is in the de-energized state the slide valve is retained by springs at a position that permits the valve hole to overlap the communicating hole to a predetermined extent. The linear motor upon being energized drives the slide valve against the springs so that the valve hole increases the opening degree of the communicating hole with an increase in the energizing current. Instead of providing the valve hole in the slide valve, a larger, second communicating hole may be formed in the iron core, this second hole being fully closed and the other communicating hole fully opened by the slide valve when the linear motor is de-energized. With energization, the fully open communicating hole is gradually closed and the second communicating hole gradually opened with an increase in the current as the slide valve is driven along the iron core against the springs. Thus the inlet and outlet ports are neither fully closed nor fully open to each other when the linear motor is in the de-energized state.

REFERENCES:
patent: 2637343 (1953-05-01), Matthews
patent: 3001549 (1961-09-01), Nelson et al.
patent: 4216938 (1980-08-01), Inada et al.
patent: 4242116 (1980-12-01), Aschberger et al.
patent: 4286767 (1981-09-01), Hashimoto
patent: 4294286 (1981-10-01), Ohumi

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