Ball Screw and Nut Assembly
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
May 5, 2011
app pub date -
Feb 6, 2009
filing date -
Feb 6, 2008
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A ball screw and nut mechanism includes a screw having helical grooves with helical ridges therebetween. A nut is formed from at least two portions and has complementary grooves which in combination with the screw grooves define raceways for at least one closed loop of rolling balls. The nut defines at least first and second seams between the two nut portions. The rolling balls circulate in a closed loop to enable the screw to translate in a linear manner relative to the nut. In the region of at least one seam, the grooves in the nut portions are configured so as to at least partially unload the balls as they roll past the seam.
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