Circulation member, motion guide device provided with...

Details Circulation member, motion guide device provided with... Circulation member, motion guide device provided with...

2005-04-05

2005-04-05

Hannon, Thomas R. (Department: 3682)

Bearings

Linear bearing

Recirculating

C074S424860

Reexamination Certificate

active

06874939

ABSTRACT:
A ball screw comprises a screw shaft, a nut assembled with the screw shaft, a number of balls disposed in the ball rolling passage formed by a ball rolling groove formed to the screw shaft and a loaded ball rolling groove formed to the nut, a number of spacers disposed between the balls in the ball rolling passage, and a circulation member for circulating the balls and spacers in accordance with a relative motion of the nut with respect to the screw shaft. The circulation member is provided with a scoop-up groove for scooping the balls, when contacting the ball rolling in the ball rolling passage, at both side edge portions of the scoop-up groove and is also provided with a spacer scoop-up portion which contacts and scoops the spacer moving in the ball rolling passage without contacting the balls. Such circulation member will be preferably utilized for a motion guide device such as linear motion guide or spline shaft.

REFERENCES:
patent: 4749284 (1988-06-01), Teramachi
patent: 6102572 (2000-08-01), Hidano
patent: 6176149 (2001-01-01), Misu
patent: 20020026844 (2002-03-01), Fujita
patent: 0 857 883 (1998-08-01), None
patent: 0 967 414 (1999-12-01), None
patent: 1 318 332 (2003-06-01), None
patent: 7-208466 (1995-08-01), None
patent: 2000-18359 (2000-01-01), None
patent: 1441121 (1988-11-01), None
Search Report dated Oct. 31, 2003.

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