Door opening/closing device

Details Door opening/closing device Door opening/closing device

2007-05-15

2007-05-15

Masih, Karen (Department: 2837)

Electricity: motive power systems

Plural diverse motor controls

Motor-reversing

C318S469000, C318S280000, C318S466000

Reexamination Certificate

active

11313802

ABSTRACT:
A first judging unit integrates an increase in a corrected current when the corrected current is in a predetermined increasing state and judges that a first condition is satisfied when an integrated increase exceeds a threshold. A second judging unit integrates a decrease in door moving speed when the door moving speed is in a predetermined decreasing state and judges that a second condition is satisfied when an integrated decrease exceeds a threshold. A third judging unit integrates a decrease in motor rotation speed when the motor rotation speed is in a predetermined decreasing state and judges that a third condition is satisfied when an integrated decrease exceeds a threshold. A pinch judging unit judges whether pinch has occurred based on determination by the first, the second, and the third judging units.

REFERENCES:
patent: 2004/0189046 (2004-09-01), Kawanobe et al.
patent: 2005/0151495 (2005-07-01), Miyauchi
patent: 09-125823 (1997-05-01), None
patent: 2003-143882 (2003-05-01), None

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