Motors: expansible chamber type – Relatively movable working members with one having motive... – Moving cylinders
Patent
1978-05-30
1980-12-23
Maslousky, Paul E.
Motors: expansible chamber type
Relatively movable working members with one having motive...
Moving cylinders
92 66, 91183, 91433, F01B 1500, F01B 100
Patent
active
042403278
ABSTRACT:
A fluid operated linear actuator control system for drive arrangements of the type wherein two fluid operated linear actuators act upon a shaft at an angle with respect to each other for causing rotation thereof is disclosed. The control system includes a fluid pressure source including a reservoir means, fluid passages connecting the pressure source with each of the fluid operated linear actuators, and control means for communicating the first of the linear actuators with fluid from the pressure source and fluid from the other with the reservoir means to displace the drive arrangement through a first arc sector, and for changing-over the communication to communicate the reservoir with fluid from the one actuator and the other actuator with fluid from the pressure source causing displacement of the drive arrangement through a second arc sector, wherein one of the actuators is in a driving mode while the other actuator is in a floating mode. According to a preferred embodiment, the control enables the drive arrangement to be locked in a fixed position via the use of piloted check valves in the fluid passages and cam switches are utilized to achieve the afore-noted change-over of communication between the actuators and the reservoir and pressure source. The control system is particularly applicable for use with linear actuators for an X-Y axis antenna drive arrangement.
REFERENCES:
patent: 448263 (1891-03-01), Rymer
patent: 3090362 (1962-05-01), Rolls
Harris Corporation
Maslousky Paul E.
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