APPARATUS TO ELIMINATE BACK DRIVE IN PUSH PULL SYSTEM OF ROTOR AIRCRAFT AND RELATED METHODS

摘要

Apparatus and methods for eliminating back drive in a push pull type control system, are provided. An exemplary apparatus includes a control rod including a pair of spaced apart piston displacement members each configured to carry a check valve. The apparatus also includes a pair of opposite-face check valves each configured to seal against respective opposing face of a piston head to form a hydraulic lock, preventing back drive in the control system.

主权项

1. An apparatus for eliminating back drive in a push pull type control system, the apparatus comprising:
a control rod including a rod end assembly comprising a pair of spaced apart piston displacement members, each piston displacement member having a check valve aperture configured to receive a check valve; a first check valve of a set of opposite-facing check valves having a body connected to a first of the pair of piston displacement members and having an aperture extending through a piston-facing surface of the first check valve for receiving hydraulic fluid; and a second check valve of the set of opposite-facing check valves having a body connected to a second of the pair of piston displacement members and having an aperture extending through a piston-facing surface of the second check valve for receiving hydraulic fluid.