Vibration noise suppressive rain sensor for a wiper control system
Patent 4603316 Issued on July 29, 1986. Estimated Expiration Date: 
January 26, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 26, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3141330 3264410 3555289 Precipitation detector for arrangements which control windshield wipers and/or washers, and the like Piezo-electric seed-flow monitor Automatic windshield wiper speed control with piezoelectric sensor Rain condition dependent wiper control system for an automotive vehicle Patent #: 4542325 InventorsAssigneeApplicationNo. 06/574142 filed on 01/26/1984US Classes:340/602, Moisture or humidity (e.g., rain)15/250.02, Coordinated operation of cleaner and applying means310/324, Diaphragm310/345, Supported by elastic material73/170.17Precipitation (e.g., rain gauge)ExaminersPrimary: Rowland, James L.Assistant: Myer, Daniel Attorney, Agent or FirmInternational ClassB60S 1/08 (20060101)Foreign Application Priority Data1983-01-28 JPAbstractA wiper control system controls an automotive wiper in accordance with rain conditions. Rain conditions are detected by means of a rain sensor which has a vibrator adapted to vibrate at an amplitude corresponding to rain conditions. The vibrator is adapted to produce a sensor signal having an amplitude corresponding to its vibration. The vibrator vibrates at a resonant frequency outside of the audible frequency range and has adequate sensitivity for detecting rain conditions. | |
