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:
Mar. 22, 2011
Filed:
Sep. 19, 2008
William A. Szabela, Brookston, IN (US);
James R. Johnson, Lafayette, IN (US);
Kevin E. Boyle, Lebanon, IN (US);
William A. Szabela, Brookston, IN (US);
James R. Johnson, Lafayette, IN (US);
Kevin E. Boyle, Lebanon, IN (US);
TRW Automotive U.S. LLC, Livonia, MI (US);
Abstract
An approved apparatus () for turning steerable wheels () of a vehicle includes a pinion () which is disposed in meshing engagement with a rack portion () of a steering member (). A steering column () is connected with a pinion () and with a vehicle steering wheel (). A ball nut assembly () is connected with an externally threaded portion () of the steering member (). A first motor () is connected with the steering column () at a location between the pinion () and steering wheel (). A second motor () is connected with the ball nut assembly (). A closed loop assembly () may be provided to control operation of the first motor (). An open loop assembly () may be provided to control operation of the second motor ().