The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2003
Filed:
Aug. 07, 2001
Applicant:
Inventors:
Shin Takehara, Hiroshima, JP;
Kiyoshi Sakamoto, Hiroshima, JP;
Assignee:
Mazda Motor Corporation, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B62D 5/04 ;
U.S. Cl.
CPC ...
B62D 5/04 ;
Abstract
In an electric power steering apparatus for a motor vehicle comprising a rack shaft ( ) provided with first and second rack portions ( and ), a pinion ( ) of a steering shaft for meshing with the first rack portion ( ), and a pinion ( ) of an electric motor ( ) for meshing with the second rack portion ( ), the first rack portion ( ) is constructed to have a constant gear ratio and the second rack portion ( ) is constructed to have a variable ratio so that an abnormal feeling during a steering operation is prevented and the lock to lock of a steering wheel is reduced to a small value.