Motors: expansible chamber type – Independently operated timer – delay – pattern or cyclic control
Patent
1980-02-01
1984-01-24
Freeh, William L.
Motors: expansible chamber type
Independently operated timer, delay, pattern or cyclic control
91499, 244 75R, F15B 2102, B64C 900, F01B 300
Patent
active
044269110
ABSTRACT:
An electric stepping motor, operated by command pulses from a computer or microprocessor, rotates a rotary control member of a distributor valve, for sequencing hydraulic pressure and flow to the cylinders of one or more axial piston hydraulic motors. A group of the cylinders are subjected to pressure and flow and the remaining cylinders are vented to a return line. Rotation of the rotary control member sequences pressurization by progressively adding a cylinder to the forward edge to the pressurized group and removing a cylinder from the trailing edge of the pressurized group. The pistons of each new pressurized group function to rotate a wobble plate into a new position of equilibrium and the hold it in such position until another change in the makeup of the pressurized group. An increment of displacement of the rotary pressurized group. An increment of displacement of the rotary hydraulic motor occurs in direct response to each command pulse that is received by the stepping motor. In an installation which includes two hydraulic motors connected to a common output, the rotary distributor valve functions to alternate driving pulses of hydraulic pressure and flow between the two motors.
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Raymond Eugene T.
Robinson Curtiss W.
Barnard Delbert J.
Freeh William L.
Heberer Eugene O.
Pauly Joan H.
The Boeing Company
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