Direct-acting servo valve

Details Direct-acting servo valve Direct-acting servo valve

1983-12-12

1985-10-01

Michalsky, Gerald A.

Valves and valve actuation

Electrically actuated valve

13762565, F15B 13044

Patent

active

045441294

ABSTRACT:
A direct-acting servo valve wherein a spool is directly driven by a force motor including a coiled first bobbin located in a first magnetic circuit composed of a first yoke and a first magnet mounted on the yoke includes a second magnetic circuit composed of a second yoke and a second magnet located at one end of the spool, and a third magnetic circuit composed of third magnets and a magnetic member located at the other end of the spool. The second magnetic circuit serves as means for detecting the velocity of the spool, and the third magnetic circuit serves as means for detecting the displacement of the spool.

REFERENCES:
patent: 3466003 (1969-09-01), Boonshaft et al.
patent: 3749128 (1973-07-01), Sallberg et al.
patent: 3850196 (1974-11-01), Fales
patent: 4456031 (1984-06-01), Taplin

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