Patent ID: 6237434
Filing Date: 2001-05-29
Classification: F16H,Y10T

Abstract:
A ball screw and nut linear actuator comprising:a. an axially extending screw having a helical groove bounded by a helical thread;b. a nut having an axially extending mating helical groove and thread received on said screw to provide a helical raceway formed by said screw and nut grooves;c. said raceway having a ball return portion and recirculating load bearing balls;d. a wiper member carried by said nut on a surface of said nut axially outboard of said raceway, said member having a helical wiper thread with axially opposed side walls received in said screw groove; ande. a radially open helical groove on one side of said wiper thread for maintaining a helical ribbon of lubricant on the screw groove for ball lubrication purposes.