Windshield cleaning system

Details Windshield cleaning system Windshield cleaning system

1981-06-15

1983-07-12

Truhe, J. V.

Electricity: motive power systems

Periodic, repetitious or successive operations control of...

318DIG2, 318466, 1525002, H02P 500

Patent

active

043933416

ABSTRACT:
A vehicle windshield cleaning system is disclosed which includes windshield wiper blades reciprocally driven by an electric motor, and an associated pump driven by an electric motor for dispensing windshield washing liquid onto a windshield to be cleaned. A manually positionable mode selector component in the electric control circuit for the blade and pump motors provides for selectively actuating the wiper blades in mist, pulse, low speed, high speed and wash modes. In the pulse mode, the blade drive motor is energized to intermittently oscillate the wiper blades through succeeding cycles with a time delay therebetween, and in the wash mode the pump motor is energized for a period of time which determines the amount of washer fluid dispensed onto a windshield. The control circuit includes a resistance-capacitance timing circuit operable in the pulse mode to determine the time delay between succeeding cycles of wiper blade oscillation, and operable in the wash mode to determine the duration of pump motor energization. The timing circuit includes an adjustable resistor, whereby both the time delay and the duration of pump motor energization can be selectively varied.

REFERENCES:
patent: 3529227 (1970-09-01), Kearns

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