Power window device with safety device

Details Power window device with safety device Power window device with safety device

1997-07-25

1998-11-10

Redman, Jerry

Movable or removable closures

Safety means responsive to obstruction to closure

318434, E05F 1502

Patent

active

058326642

ABSTRACT:
A safety control power window device which reliably detects nipping of a finger by a window and sash and which is little influenced by variations of motor characteristics of the motor used as a drive source of the power window device. The window position and a thrust pressure acting on the rotary shaft of the motor providing the force for opening and closing the window are detected. Reference pressures for detecting nipping are set according to the window position detected. By comparing the detected pressure and the reference pressures, nipping by the window is detected. Since nipping and the window position are not detected using the drive current of the motor, accurate safety control is realized, eliminating influences caused by variations of the characteristics of the motor.

REFERENCES:
patent: 4763219 (1988-08-01), Nakamura
patent: 5105135 (1992-04-01), Nashiki et al.
patent: 5166586 (1992-11-01), Yaguchi
patent: 5220259 (1993-06-01), Werner et al.
patent: 5385013 (1995-01-01), Barron et al.
patent: 5399949 (1995-03-01), Hidaka
patent: 5404673 (1995-04-01), Takada et al.

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