Electricity: motive power systems – Motor-reversing
Patent
1995-12-12
2000-03-21
Masih, Karen
Electricity: motive power systems
Motor-reversing
318443, 318444, 318DIG2, 307 10, 160 11, 7386141, 11525013, 115 5021, 1152565, H02P 100
Patent
active
060406674
ABSTRACT:
A wiper system and method for use in a wiper system on a vehicle, such as an automobile, a truck, an agricultural vehicle, and the like is shown having a wiper motor having a drive shaft which is driven at a substantially linear rate. A first gear is cooperatively coupled to the output shaft and driven thereby at the linear rate. A second gear is coupled to the first gear and it is driven in response to the movement of the drive shaft. The second gear is operatively coupled to a third gear which drives a crank which is coupled to a plurality of wiper blades via suitable linkage. The system and method are have at least one gear which is non-symmetrical about its axis which enables or cause the crank to be driven at a non-linear rate relative to the rate of the drive shaft. In one embodiment, the second and third gears are elliptical and are situated such that the velocity of the wiper blades in the wiper system are driven at a velocity which is less than the velocity of the drive shaft during the inwipe and outwipe positions and higher than the velocity of the drive shaft when the wiper blades move away from the outwipe or inwipe position. The velocity is also cause to begin decreasing as the wiper blades move from the center wipe position towards the inwipe or outwipe position.
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Lewis J. Gordon
Masih Karen
Valeo Elecrical Systems, Inc.
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