Electricity: motive power systems – Automatic and/or with time-delay means – Movement – position – or limit-of-travel
Reexamination Certificate
2005-01-11
2005-01-11
Ip, Paul (Department: 2837)
Electricity: motive power systems
Automatic and/or with time-delay means
Movement, position, or limit-of-travel
C318S466000, C359S877000
Reexamination Certificate
active
06841960
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 battery3is stabilized in a motor power stabilizing circuit10, and supplied via a motor driving circuit8to a tilt motor M2. Polarity of the voltage outputted from the motor power stabilizing circuit10is fixed. Polarity of the voltage outputted from the motor driving circuit8is switchable according to a switching operation of the motor driving circuit8based upon a driving direction instruction. The pickup coil L10is provided between the motor power stabilizing circuit10and the motor driving circuit8.
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Nagao Mituyoshi
Sato Hidenori
Yamada Ayako
Ip Paul
Murakami Corporation
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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