Worm support device and power assist unit having the same

Motor vehicles – Steering gear – With electric power assist

Reexamination Certificate

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Details

C384S450000

Reexamination Certificate

active

07568550

ABSTRACT:
Deep groove ball bearings are used as bearings supporting both side portions of a worm. In the first bearing on the side of a motor, the curvature radius of a raceway groove in an inner ring or the curvature radius of a raceway groove in an outer ring are set to a specific numerical range with respect to the diameter of a ball.

REFERENCES:
patent: 4343521 (1982-08-01), Akabane et al.
patent: 6364049 (2002-04-01), Iwasaki et al.
patent: 6550567 (2003-04-01), Murakami et al.
patent: 6655846 (2003-12-01), Beckers et al.
patent: 2002/0039460 (2002-04-01), Nishimura et al.
patent: 11-43062 (1999-02-01), None
patent: 2000-74074 (2000-03-01), None
patent: 2000-249149 (2000-09-01), None
patent: 2000-291665 (2000-10-01), None
patent: 2001-248652 (2001-09-01), None
patent: 2002-67992 (2002-03-01), None
patent: 2002-284022 (2002-10-01), None

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