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:
Jan. 29, 2013
Filed:
Mar. 23, 2011
Mauro Pacheco Escobedo, Troy, MI (US);
Miroslaw Zaloga, Shelby Township, MI (US);
Christopher J. Mielke, Shelby Township, MI (US);
George E. Doerr, Clarkston, MI (US);
Scott R. Kloess, Rochester Hills, MI (US);
Mauro Pacheco Escobedo, Troy, MI (US);
Miroslaw Zaloga, Shelby Township, MI (US);
Christopher J. Mielke, Shelby Township, MI (US);
George E. Doerr, Clarkston, MI (US);
Scott R. Kloess, Rochester Hills, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A power steering system includes an input shaft operatively connected to an input member, and a sector gear operatively connected to a pitman arm. A first ball screw is formed on the input shaft. A first ball nut circumscribes the first ball screw and is in torque-transfer communication therewith through a plurality of ball bearings. A first rack is rigidly attached to the first ball nut, and is meshed with the sector gear for torque transfer therewith. A second ball screw is not substantially coaxial with the first ball screw. A second ball nut circumscribes the second ball screw and is in torque-transfer communication with the second ball screw through the ball bearings. A second rack is meshed with the sector gear for torque transfer therewith. An electric motor is configured to selectively supply torque to the sector gear through the second ball screw.