Roller screw having plural circulating devices cooperating...

Details Roller screw having plural circulating devices cooperating... Roller screw having plural circulating devices cooperating...

2008-09-12

2010-12-07

Hannon, Thomas R (Department: 3656)

Machine element or mechanism

Gearing

Directly cooperating gears

C074S424870, C074S424820

Reexamination Certificate

active

07845251

ABSTRACT:
A roller screw having plural circulating devices cooperating with plural helical grooves comprises a screw, a nut, plural rollers and circulating devices. The screw is provided in a surface with at least two helical grooves. The nut is provided with helical grooves opposite to the screw and receiving holes in a peripheral wall thereof, and each receiving hole is provided with a fixing groove at each of two ends thereof. The rollers are arranged in the helical grooves of the screw and the nut. The circulating devices have the same number of the helical grooves of the screw, and each circulating device includes an opening at each of two ends thereof and a passage between the two openings.

REFERENCES:
patent: 5791192 (1998-08-01), Lee
patent: 6425302 (2002-07-01), Greubel
patent: 6481305 (2002-11-01), Nishimura et al.
patent: 6561053 (2003-05-01), Greubel
patent: 7523682 (2009-04-01), Liao et al.
patent: 2004/0211280 (2004-10-01), Nishimura et al.
patent: 2008/0302197 (2008-12-01), Liu et al.

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