Safety device and method for power window

Details Safety device and method for power window Safety device and method for power window

1993-05-18

1995-06-06

Ro, Bentsu

Electricity: motive power systems

Plural diverse motor controls

Motor-reversing

318285, 318434, 318466, 318630, 49 26, E05F 1510

Patent

active

054225515

ABSTRACT:
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.

REFERENCES:
patent: 3644811 (1972-02-01), Robbins
patent: 4220900 (1980-09-01), Mintz
patent: 4585981 (1986-04-01), Zintler
patent: 4641067 (1987-02-01), Iizawa et al.
patent: 4672278 (1987-06-01), Ingraham et al.
patent: 4900994 (1990-02-01), Mizuta

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