Ball screw mechanism and electric power steering apparatus...

Details Ball screw mechanism and electric power steering apparatus... Ball screw mechanism and electric power steering apparatus...

2007-04-24

2007-04-24

Joyce, William C. (Department: 3682)

Machine element or mechanism

Gearing

Directly cooperating gears

C074S424820

Reexamination Certificate

active

10421792

ABSTRACT:
An electric power steering apparatus comprises a rack-and-pinion mechanism and a ball screw mechanism. The ball screw mechanism comprises a shaft formed a screw groove and a nut formed a screw groove. A ball-roll path is created spirally by the screw grooves of the shaft and the nut being opposite each other. A plural number of balls are contained into the ball-roll path. A ball-return path is connecting both ends of the ball-roll path so that the balls go through. A circulation path consists of the ball-roll path and the ball-return path, in which the balls move endlessly. A plural number of separators is arranged between the balls respectively in order to prevent balls from contacting each other. A number of the balls is fewer from one ball to three balls than a maximum number of the balls which can be contained into the circulation path.

REFERENCES:
patent: 5927858 (1999-07-01), Agari
patent: 6095009 (2000-08-01), Takagi
patent: 6176149 (2001-01-01), Misu
patent: 6347558 (2002-02-01), Miyaguchi et al.
patent: 6415676 (2002-07-01), Takagi et al.
patent: 2003/0221501 (2003-12-01), Ohkubo et al.
patent: 26 27 025 (1977-12-01), None
patent: 42 35 842 (1994-04-01), None
patent: 1 026 067 (2000-08-01), None
patent: 10-281154 (1998-10-01), None
patent: 11-037246 (1999-12-01), None
patent: 2000-120825 (2000-04-01), None
patent: 2000-199556 (2000-07-01), None
patent: 2000-355278 (2000-12-01), None
patent: 2001-132811 (2001-05-01), None
patent: 2002-019625 (2002-01-01), None
patent: 59-43717 (2006-03-01), None

Affiliated with

Also associated with

Rating

Ball screw mechanism and electric power steering apparatus... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ball screw mechanism and electric power steering apparatus..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ball screw mechanism and electric power steering apparatus... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3735399