Ball screw and nut assembly with a nut having a preloaded wiper thread and method of its manufacture and operation
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
May 29, 2001
Grant Date -
N/A
app pub date -
Aug 25, 1999
filing date -
Aug 31, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A ball screw and nut linear actuator has a screw and nut with helical grooves and threads providing a helical raceway between them. The raceway has a ball return portion and provides a track for a train of recirculating load bearing balls. A wiper member carried by the nut has a helical wiper thread which is preloaded to engage an outer side of the helical groove of the screw outboard of the nut. The helical wiper thread has a radially open helical groove for maintaining and distributing a helical ribbon of lubricant on the side of the screw groove upon which it is pressed.
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