Fluid handling – Systems – Multi-way valve unit
Patent
1984-06-28
1988-12-13
Michalsky, Gerald A.
Fluid handling
Systems
Multi-way valve unit
137312, 13759617, 13762544, 137870, 251 75, 2511291, F15B 13044, F16K 3106
Patent
active
047903538
ABSTRACT:
An electromagnetically actuated hydraulic switch unit is provided by an armature plunger which reciprocally shuttles between partially overlapping magnetic paths and operating a hydraulic valve circuit through bistable snap blade means. Snap blades open and close entry ports, exit ports and vent ports to connect various passages in a housing and perform given hydraulic functions. The ratio of the permeances of the two magnetic paths, created by dedicated coaxial coils, is controlled such that one path always overpowers the other by an amount greater than the mechanical gradients of a pair of snap blades in hydraulic fluid filled cavities, to insure plunger movement in either direction.
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Bigelow James H.
Hastings Jerome K.
Schultz Gary
Eaton Corporation
Michalsky Gerald A.
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