Electrically-operated power steering apparatus
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United States of America Patent
Stats
-
Nov 11, 1997
Grant Date -
N/A
app pub date -
Mar 10, 1995
filing date -
Mar 17, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An electrically-operated power steering apparatus comprises a steering shaft, a rack shaft capable of linear movement for turning a steering running wheel a, rack-pinion gear for coupling the steering shaft with the rack shaft, and a ball screw mechanism including a screw groove formed on the rack shaft, a rotary ball screw nut fitted on the rack shaft, and plural balls positioned in a rolling path. The plural balls are comprised of bulbs of a larger diameter and balls of a smaller diameter, which are alternately arranged, and the smaller diameter is within a defined range.
First Claim
Family
International Classification(s)
Cited Art Landscape
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