Power-window jamming preventing apparatus

Details Power-window jamming preventing apparatus Power-window jamming preventing apparatus

2005-08-30

2005-08-30

Duda, Rina (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Movement, position, or limit-of-travel

C318S280000, C318S283000, C318S434000, C318S466000, C049S026000, C049S028000

Reexamination Certificate

active

06936988

ABSTRACT:
A power-window jamming preventing apparatus, includes a current sensing circuit, which senses a motor current flowing through a motor for driving a window glass; a current limiting circuit, which increases and decreases the motor current based on a current-limitation control signal outputted from the current sensing circuit when an amount of increase of the motor current exceeds a predetermined vale; a jamming determining circuit, which determines a jamming of a foreign matter in the window glass based on increase of the motor current to reverse a rotation of the motor; and a charge/discharge controlling circuit which monitors a voltage level of a charge/discharge controlling signal, and controls a charging/discharging circuit to keep a third reference voltage constant when the charge/discharge controlling signal having one of voltage levels is continuously outputted for a predetermined time.

REFERENCES:
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patent: 5977732 (1999-11-01), Matsumoto
patent: 6051945 (2000-04-01), Furukawa
patent: 6359408 (2002-03-01), Tyckowski
patent: 6548979 (2003-04-01), Boisvert et al.
patent: 6867563 (2005-03-01), Ohshima
patent: 2002-295129 (2002-10-01), None

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