Machine element or mechanism – Gearing – Directly cooperating gears
Reexamination Certificate
2006-04-11
2006-04-11
Rachuba, M. (Department: 3723)
Machine element or mechanism
Gearing
Directly cooperating gears
Reexamination Certificate
active
07024958
ABSTRACT:
A linear motion apparatus has a guide shaft including a spiral-shaped or linear-shaped rolling element rolling groove, a movable body including a spiral-shaped or linear-shaped rolling element rolling groove opposed to the rolling element rolling groove of the guide shaft, a large number of rolling elements rollably moving along a rolling element rolling passage formed between the rolling element rolling grooves of the guide shaft and movable body and, a rolling element return passage communicating with the rolling element rolling passage, wherein, in the portion of the rolling element rolling groove of the movable body that is adjacent to an open end of a rolling element return passage, an escape portion is formed by abrasive flow machining in such a manner that the grinding depth thereof increases gradually toward the open end of the rolling element return passage.
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NSK Ltd.
Rachuba M.
Sughrue & Mion, PLLC
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