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Automatic windshield wiper apparatus with raindrop detector for automotive vehicles and methods for automatically controlling wiper apparatus

  • US 5,119,002 A
  • Filed: 10/22/1990
  • Issued: 06/02/1992
  • Est. Priority Date: 10/23/1989
  • Status: Expired due to Fees
First Claim
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1. An automatic windshield wiper apparatus for a motor vehicle comprising:

  • a wiper blade for the vehicle'"'"'s windshield;

    a wiper motor for driving said wiper blade;

    wiper switch means for selecting between automatic and manual mode of operation;

    a combined sensor having a moisture sensor for sensing the presence of moisture, said moisture sensor is provided on the upper face of a vibratory plate, said vibratory plate and a piezo-electric device which is disposed on one face of said vibratory plate, serve as a vibration sensor for detecting vibration caused by raindrops on the other face of said vibratory plate; and

    a control means for controlling said wiper motor according to a moisture signal provided by said moisture sensor, and according to a vibration signal provided from said vibration sensor, said control means operable for actuating and stopping said wiper motor, in accordance with the moisture and vibration signals.

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