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. 11, 2005
Filed:
Apr. 10, 2003
Ayako Yamada, Fujieda, JP;
Mituyoshi Nagao, Fujieda, JP;
Hidenori Sato, Fujieda, JP;
Murakami Corporation, Shizuoka, JP;
Abstract
In response to an operation of reversing a vehicle, a tilt motor is rotated by a specific amount in a normal direction to tilt a mirror angle to a position that permits a mirror to provide the driver with a view of the area near a rear wheel of the vehicle, while in response to an operation of releasing the reverse gear, the tilt motor is rotated by a specific amount in a reverse direction to restore the tilt angle to a normal position thereof. During the operations, a high-frequency signal generated upon switching a brush of the motor is detected using a pickup coil to determine an amount of rotation of the motor. One and the same pickup coil may be used for detection during both of normal and reverse rotations. A voltage of a batteryis stabilized in a motor power stabilizing circuit, and supplied via a motor driving circuitto a tilt motor M. Polarity of the voltage outputted from the motor power stabilizing circuitis fixed. Polarity of the voltage outputted from the motor driving circuitis switchable according to a switching operation of the motor driving circuitbased upon a driving direction instruction. The pickup coil Lis provided between the motor power stabilizing circuitand the motor driving circuit