Electricity: motive power systems – Periodic – repetitious or successive operations control of...
Patent
1995-03-07
1996-10-22
Ro, Bentsu
Electricity: motive power systems
Periodic, repetitious or successive operations control of...
318 41, 318 62, 318 85, 318DIG2, B60S 108, H02P 552
Patent
active
055680267
ABSTRACT:
Two windshield wiper blades are powered by separate electric motors. The blades overlap and when one blade is at its reversal point the other blade leaves part as the other blade begins to return to park. The position of the blades is encoded. The blades, if synchronized should be at identical locations and position codes at the same time. Motor power to the blade that arrives first is be removed, allowing the blade to coast. If the other blade still does not arrive at the position after an elapsed time, the first to arrive blade is dynamically braked. Intermittent wiper operation is provided in a way that initiates an immediate wipe if wiper delay is changed while the blades are parked.
REFERENCES:
patent: 4431954 (1984-02-01), Carpenter et al.
patent: 4585980 (1986-04-01), Gille et al.
patent: 4665488 (1987-05-01), Graham et al.
patent: 4670695 (1987-06-01), Licata et al.
patent: 5216340 (1993-06-01), Welch
patent: 5252897 (1993-10-01), Porter et al.
Greenstein Robert E.
Ro Bentsu
United Technologies Motor Systems, Inc.
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