Drive circuit system for power window

Details Drive circuit system for power window Drive circuit system for power window

1998-08-06

1999-11-30

Paladini, Albert W.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307113, 307115, 307116, H01H 4700

Patent

active

059947977

ABSTRACT:
A circuit is provided to ensure that even when a drive circuit system for a power window is wetted with water due to the entering of water or the condensatin of water, the opening and closing of the power window can be performed without hindrance. Coils of an opening relay and a closing relay are selectively connected at one end thereof to a power source or ground through a control switch and at the other end to the power source or ground through an electronic circuit which has been subjected to a water-proofing treatment. Even if leakage current flows from a high-potential portion of the coils to ground, the leakage current is caught by electric current flowing from the power source. In addition, even if leakage current flows from the power source to a lower-potential portion of the coils, the leakage current flows to ground without passing through the coils. Therefore, the unintended excitation and de-excitation of the coils can be prevented to thereby reliably open and close the power window.

REFERENCES:
patent: 4246575 (1981-01-01), Purtell et al.
patent: 4394605 (1983-07-01), Terazawa
patent: 4761593 (1988-08-01), Nakase
patent: 4942612 (1990-07-01), Wu
patent: 5097186 (1992-03-01), Kokubu
patent: 5128597 (1992-07-01), Kokubu
patent: 5329163 (1994-07-01), Satoh et al.
patent: 5627411 (1997-05-01), Bochenek
patent: 5698907 (1997-12-01), Weber

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