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US 5,351,439 AGranted
Power window apparatus having improved safety device
AssigneeKoito Manufacturing Co., Ltd.
InventorsHitoshi Takeda, Keiichi Tajima, Toru Nakayama
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AssigneeKoito Manufacturing Co., Ltd.
InventorsHitoshi Takeda, Keiichi Tajima, Toru Nakayama
Estimating the term…
A power window apparatus with a safety device capable of taking a safety measure when it detects the neck or hand of a passenger being caught in the window, which device can exactly detect such a dangerous state and take a reliable safety measure to correct for the same, irrespective of variations of ambient temperature. A temperature sensor provided which senses the temperature of the motor acting as a drive source for moving the window. This temperature is closely related to the ambient temperature. A reference value for the motor speed for detecting an object-caught state is altered according to the detected temperature, thereby providing exact detection of the object-caught state irrespective of temperature variations. Preferably, the power transmission for the window, the temperature sensor, and a controller structure are mounted on an inner side of a single housing.
A power window apparatus, comprising:
A method for operating a power window, comprising the steps of:
In a drive unit for a power window apparatus having a housing, a motor mounted in said housing and functioning as a drive source for raising and lowering a window, power transmission means for driving a pulley with said motor in a reduction manner, sensor means for sensing a state of rotation of said motor, and a control circuit for controlling rotation of said motor in accordance with signals output from said sensor means, the improvement wherein said power transmission means, said sensor means, and said controller structure are mounted on an inner side of said housing.
Dependencies are inferred from the claim text.