Power drive unit

Details Power drive unit Power drive unit

1978-04-26

1980-07-01

Freeh, William L.

Motors: expansible chamber type

Three or more cylinders arranged in parallel radial or...

Cylinders parallel to rotation axis

60230, F01B 1304, F04B 130

Patent

active

042100666

ABSTRACT:
A power drive unit for operation of structure in opposite directions, such as aircraft structure and, particularly, thrust reverser structure of an aircraft engine operable between stow and deploy positions, including, a bi-directional hydraulic motor having a variably positionable wobbler for controlling displacement of the motor. Control structure includes a valve for causing fluid flow through the motor in either of two directions, a control cylinder and piston connected to the wobbler for setting the motor at either minimum or maximum displacement conditions. In one embodiment, there is an intermediate displacement position. The displacement condition is established by valve structure responsive to the particular cycle of operation.

REFERENCES:
patent: 2428025 (1947-09-01), Ingoldby
patent: 2863422 (1958-12-01), Mercior et al.
patent: 3164960 (1965-01-01), Weisenbach et al.
patent: 3184427 (1965-05-01), Magnuson
patent: 3495536 (1970-02-01), Fahey
patent: 3931944 (1976-01-01), Capewell

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