Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1982-08-02
1986-01-21
Look, Edward K.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91396, 91405, 180132, F15B 910
Patent
active
045651159
ABSTRACT:
The distributor defines two parallel fluid circuits (15, 16) each including serially arranged first (1;1') and second (2;2') valve means actuated by the primary control member (OP) of the distributor, two distribution lines (17, 18) for selectively supplying the chambers of an assistance motor-actuator (12) derivating from said circuits (15, 16) downstream the primary valve means (1;1'), and two additional return valve means (3;3'), upstream said second valve means (2;2') coupled to the piston (13) of the actuator (12) to form a restriction in the return circuit from the actuator chamber in relieved condition and thus create an over-pressure enabling effective return of the actuator to neutral position after return of distributor to rest condition.
REFERENCES:
patent: 3118349 (1964-01-01), Combs
patent: 3238850 (1966-03-01), Desmarchelier
patent: 3322039 (1967-05-01), Madland
patent: 3896703 (1975-07-01), Bertanza
patent: 4008782 (1977-02-01), Chanal
patent: 4310024 (1982-01-01), Bacardit
patent: 4335749 (1982-06-01), Walter
patent: 4421010 (1983-12-01), Elser
Bendiberica /S.A.
Decker Ken C.
Look Edward K.
Palguta Larry J.
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