Method for monitoring movable elements
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United States of America Patent
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May 28, 1996
Grant Date -
N/A
app pub date -
Nov 15, 1994
filing date -
Nov 18, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In order to improve a method for monitoring movable elements, in particular windows and sunroofs in motor vehicles, such that an object clamped between the movable parts and the part at rest is detected in a reliable fashion, the force acting upon such objects is maintained at the lowest possible value and the direction of the window is inverted as rapidly as possible. In order to ensure a reliable protection, a cutoff threshold consists of a constant component and a variable component, with the size of the difference (Dn) between the cutoff threshold and the instantaneous value of the rotation time (tu) influencing the switching signal.
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