Hydropneumatic drive apparatus

Details Hydropneumatic drive apparatus Hydropneumatic drive apparatus

1982-11-22

1985-07-16

Garrett, Robert E.

Expansible chamber devices

Displacement control of plural cylinders arranged in...

91 35, 91361, F15B 1522, F15B 2102

Patent

active

045288941

ABSTRACT:
An active pneumatic mechanism and a passive hydraulic mechanism of the apparatus are so connected with each other and with a driven member that movement imparted by the pneumatic mechanism to the driven member produces, and is controllable by restriction of, hydraulic fluid flow within the hydraulic mechanism. Restriction of the fluid flow to any desired extent is accomplished by command signals directed by a control computer to a valve that preferably is of the type actuable by a torque motor. The command signals produced by the computer are based upon a correlation of data supplied by a computer program with data supplied by a monitor of the positions of the driven member along its path of travel. Precise control of the speeds, accelerations and positions of the driven member are realized.

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