Electricity: motive power systems – Positional servo systems – With protective or reliability increasing features
Reexamination Certificate
2005-05-17
2005-05-17
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Positional servo systems
With protective or reliability increasing features
C318S286000, C318S469000, C049S026000
Reexamination Certificate
active
06894451
ABSTRACT:
A power window apparatus includes a window glass having a horizontal side and an inclined side at the upper end thereof; a window frame for supporting the window glass; and a motor for vertically driving the window glass. In this power window apparatus, a parameter (for example, pulse period) corresponding to a load torque on the motor is measured; a first threshold to determine whether an object is caught between the horizontal side and the window frame, and a second threshold (which is smaller than the first threshold) to determine whether an object is caught between the inclined side and the window frame are set; and the measured parameter is compared with the corresponding set threshold to stop or reverse the motor when the parameter exceeds the threshold.
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patent: 11-131909 (1999-05-01), None
Alps Electric Co. ,Ltd.
Brinks Hofer Gilson & Lione
Ro Bentsu
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