Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1992-09-30
1994-03-01
Michalsky, Gerald A.
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
91461, 251 38, 251 44, F16K 31363, F16K 3140
Patent
active
052900070
ABSTRACT:
A control device for a volume stream of a hydraulic working medium has a blocking valve having a seat valve body cooperating with a stationary main valve seat, a pre-control valve member arranged in the seat valve member and cooperating with a valve seat provided with the seat valve member, an actuating device with which the pre-control valve member is in an operative communication, a spring providing a force with which the pre-control valve member cooperates with the valve seat and controls a pressure in a pressure chamber formed in the seat valve member and a valve housing. The seat valve member is pressed against the main valve seat under the action of the pressure, a pressure chamber for a working medium is formed, a throttle point with a constant cross-section communicates the pressure chamber between the seat valve body and the valve housing constantly with the pressure chamber of the working medium, a variable throttle point connects the pressure chamber between the seat valve body and the valve housing with a container. The variable pressure point has a cross-section which is changeable by the pre-control valve member. The actuating device which cooperate with the pre-control valve member is formed as a proportional magnet mounted on the locking valve.
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patent: 5048790 (1991-09-01), Wells
Lueues Holger
Sandau Hartmut
Michalsky Gerald A.
Robert & Bosch GmbH
Striker Michael J.
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