Motors: expansible chamber type – Working member position responsive motive fluid control – Venting expanding chamber
Patent
1981-01-15
1984-03-20
Maslousky, Paul E.
Motors: expansible chamber type
Working member position responsive motive fluid control
Venting expanding chamber
91189R, 91437, F15B 1522
Patent
active
044373872
ABSTRACT:
Fluid introduced into an actuator moves the piston, against the force of a return spring, to extend the actuator. After the actuator has extended a sufficient amount to perform its intended function, the piston contacts and moves a sleeve type closure for an outlet port. The additional extension of the actuator moves the sleeve to open the outlet port. This allows fluid from the source to flow through the actuator and out through the outlet port to an expansible chamber in a second actuator. In a preferred system, the second actuator is also a single acting linear motor and it includes a return spring. At the conclusion of the function of both actuators, a bypass valve in a return line is opened to allow fluid to flow out from the expansible chambers of both actuators back to a reservoir. The fluid from the second actuator flows back to the outlet port of the first actuator and from such port through a passageway which connects such port with the inlet-outlet port of the first actuator. A check value in such passageway permits such flow, but prevents flow in the opposite direction.
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Barnard Delbert J.
Maslousky Paul E.
Pauly Joan H.
The Boeing Company
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