Patent ID: 8393568
Filing Date: 2013-03-12
Classification: B64C,F16D

Abstract:
1. An aircraft actuator for controlling movement of an aircraft flight control surface, comprising: a housing having a leading end and a trailing end; a ball nut rotatably supported in the housing; a ball screw extending along a longitudinal axis and having a terminal end operatively connectable to the flight control surface, the ball screw movable between a first retracted position and a second extended position in response to rotation of the ball nut; a one-way roller clutch operatively connectable to the ball nut, the roller clutch engaging the housing and substantially preventing rotation of the ball nut in a first direction in response to a compressive force on the ball screw by the flight control surface; and a roller assembly positioned between the ball nut and the one-way roller clutch and at least partially surrounded by a lubricating medium, the roller assembly including a roller cage and at least one roller, the roller cage including at least one wiper configured to move the lubricating medium toward its functional location adjacent the rollers.