Motors: expansible chamber type – Relatively movable working members with one having motive... – Position of one working member controls motive fluid for...
Patent
1981-11-16
1984-06-05
Maslousky, Paul E.
Motors: expansible chamber type
Relatively movable working members with one having motive...
Position of one working member controls motive fluid for...
91391R, 744248VA, 74625, F15B 1310
Patent
active
044521251
ABSTRACT:
A manual actuator which enables manual operation of a valve, damper or other controlled element upon loss of hydraulic pressure in an associated electrohydraulic actuator assembly. The apparatus preferably includes nut segments which are automatically moved into engagement with a coacting threaded shaft upon loss of hydraulic pressure in the electrohydraulic device and which function when so engaged with the shaft to render a manual operating element effective to move the controlled part.
REFERENCES:
patent: 2387215 (1943-02-01), Fawkes
patent: 3217604 (1965-11-01), Knox
patent: 3786728 (1974-01-01), Sheesley et al.
Milliampere Hydramotor Actuator Manual; published by General Controls-International Telephone and Telegraph Corp.; 1977; pp. 1 through 16.
AH90 Series Milliampere Hydramotor Actuator; published by General Controls-International Telephone and Telegraph Corp.; 1977; pp. 1 through 10.
Keller William F.
Sibley Richard D.
Green William P.
Koso International, Inc.
Maslousky Paul E.
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