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:
Apr. 14, 2009
Filed:
Aug. 14, 2003
Dennis A. Kramer, Troy, MI (US);
Dennis A. Kramer, Troy, MI (US);
ArvinMeritor Technology, LLC, Troy, MI (US);
Abstract
A simple parking brake includes an electric motor having an internally threaded nut. The internally threaded nut receives an externally threaded shaft. The shaft is pinned to a lever, such that it cannot rotate. The shaft thus moves linearly when the electric motor drives the nut to rotate. As the shaft moves, it drives the brake actuator between a parking position and a release position. A control supplies a pulse to drive the motor in the appropriate direction and for the particular appropriate distance. The pulse length is preferably selected to be longer than that necessary to move the shaft the necessary distance. The motor is preferably sized to stall once the desired park or open position is achieved. In this manner, a simple control is able to control the motor.