Motors: expansible chamber type – Working member position responsive motive fluid control – Venting expanding chamber
Patent
1977-01-04
1980-02-26
Schwadron, Martin P.
Motors: expansible chamber type
Working member position responsive motive fluid control
Venting expanding chamber
251321, F15B 1520
Patent
active
041899822
ABSTRACT:
A feed pressure bypass valve means and actuator means primarily for a single acting servomotor, is provided having a unitary housing construction and an assembly of opposed springs wherein one spring biases a bypass valve to closed position and the other spring is compressed by the servometer piston to act in the opposite direction. The bypass valve is mounted externally of the servomotor as a separate and integral unit and has for its purposes to ensure maintaining a drop in feed pressure as the piston nears the end of its stroke. The provision of the spring compressed by the piston toward the end of the stroke ensures the opening and maintenance of opening of the bypass valve. There can be no instability of steering operation by virtue of the bypass valve closing and the striking of the servomotor cylinder wall by the piston is precluded.
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Fassbender Rolf
Lang Armin
Schwadron Martin P.
Walton G. L.
Zahnradfabrik Friedrichshafen AG
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