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US 5,422,551 AGranted
Safety device and method for power window
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 safety device for a power window which, if one's hand or neck is caught between the window glass and the sash, detects such state instantaneously and accurately to perform a safety control operation. Respective detectors detect the absolute and relative speeds of a power window opening or closing operation to determine whether or not a foreign object is caught in the window. When at least one of the detectors detects a foreign object being caught in the window, a safety control operation is carried out, for instance, stopping the movement of the window glass. Since the absolute speed and the relative speed are utilized in combination, a dangerous state can be detected instantaneously and accurately. Also, backlash in the drive mechanism for the window can be detected, and the safety control operation inhibited during such times to prevent erroneously effecting a safety control operation.
In a safety device for a power window of a vehicle in which a speed of operation of a drive source adapted to open and close said power window is detected by comparing said speed of operation with a reference value to determine whether or not a foreign object is caught in said window, thereby to perform a safety control operation, wherein the improvement comprises:
In a safety device for a power window of a vehicle in which a speed of operation of a drive source adapted to open and close said power window is detected by comparing said speed of operation with a reference value to determine whether or not a foreign object is caught in said window, thereby to perform a safety control operation, wherein the improvement comprises:
In a method for operating a power window of a vehicle in which a speed of operation of a drive source adapted to open and close said power window is detected by comparing said speed of operation with a reference value to determine whether or not a foreign object is caught in said window, thereby to perform a safety control operation, wherein the improvement comprises the steps of:
In a method for operating a power window of a vehicle in which a speed of operation of a drive source adapted to open and close said power window is detected by comparing said speed of operation with a reference value to determine whether or not a foreign object is caught in said window, thereby to perform a safety control operation, wherein the improvement comprises the steps of:
Dependencies are inferred from the claim text.