Power-window jamming preventing apparatus

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

2005-09-06

2005-09-06

Duda, Rina (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Movement, position, or limit-of-travel

C318S434000, C318S280000, C318S283000, C318S466000, C049S026000, C049S028000

Reexamination Certificate

active

06940246

ABSTRACT:
A power-window jamming preventing apparatus, includes a current sensing circuit, which senses a motor current flowing through a motor; 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; and a jamming determining circuit, which determines a jamming of a foreign matter in the window glass, and a potential difference generating circuit, which monitors a power source voltage supplied to the current sensing circuit and the power window motor, and which clamps a third reference voltage so as to drop a constant voltage from the third reference when the power source is low such that a potential difference between the second reference voltage and the third reference voltage is kept greater than a predetermined voltage.

REFERENCES:
patent: 5559375 (1996-09-01), Jo et al.
patent: 5729104 (1998-03-01), Kamishima et al.
patent: 5734245 (1998-03-01), Terashima et al.
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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