Integrated electrohydraulic actuator

Details Integrated electrohydraulic actuator Integrated electrohydraulic actuator

1997-12-19

1999-05-25

Michalsky, Gerald A.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

13762564, 13762565, F15B 13043, F15B 13044

Patent

active

059063513

ABSTRACT:
A low cost, electromagnetic efficient integrated electrohydraulic actuator includes a sleeve disposed within a housing and an annular electric coil formed as an integral part of the sleeve so that the coil is deeply integrated in the housing. An armature slidably disposed within an axial bore of the sleeve has the fluid metering functions integrally formed thereon so that the armature functions as a valve spool for controlling communication between an inlet port and an outlet port and between the outlet port and a tank port. The armature is thus the only movable part of the actuator.

REFERENCES:
patent: 4310143 (1982-01-01), Determan
patent: 5350152 (1994-09-01), Hutchison et al.
patent: 5632306 (1997-05-01), Taka

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