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Dual windshield wiper motor synchronization

  • US 5,216,340 A
  • Filed: 03/13/1992
  • Issued: 06/01/1993
  • Est. Priority Date: 03/13/1992
  • Status: Expired due to Fees
First Claim
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1. A windshield wiper drive comprising a pair of motors, each operating a wiper;

  • a power source in electrical connection with each motor for energizing each motor to move the wiper;

    wiper parking means associated with each motor for providing a circuit interruption in said electrical connection when the wiper operated by the motor is at a wiper park position, characterized by a motor synchronizer responsive to the motion of said wiper parking means to synchronize the speed of the motors comprising;

    means for providing a first signal for a first time interval in response to said circuit interruption to a first motor in said pair of motors;

    means for receiving said first signal and providing a second signal upon said circuit interruption to a second motor in said pair of motors following said first time interval and for preventing the production of said second signal if said circuit interruption to said second of the motors occurs during said first time interval;

    means for providing a third signal for a third time interval in response to said second signal; and

    means for receiving said third signal and deenergizing said first motor for said third time interval following said circuit interruption in the connection to said first motor.

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