Moveable window unit having a noise reduction system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 20, 2002
Grant Date -
N/A
app pub date -
Jul 30, 1999
filing date -
Dec 1, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A movable window unit having a window glass which can be moved between a closed end position in a well of a door and an open end position by a motorized drive. The motorized drive comprises an electric motor which is controlled by a motor control. To reduce undesirable noises which may arise during the movement of the window glass, the motor is operated by the motor control to repeatedly vary the speed of displacement of the window glass.
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