Electric window regulator having a spring for increasing the time in which an anti-pinching system can operate
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United States of America Patent
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-
Jan 7, 2003
Grant Date -
N/A
app pub date -
Nov 23, 1999
filing date -
Jul 4, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A motor vehicle power-operated window lift, comprises a mechanism for driving the window, an electric motor (3), an anti-pinch system which can be triggered when there is an obstacle obstructing the window travel, and an electronic circuit for controlling the motor and the anti-pinch system. The window lift comprises a spring to reduce the pinch force when the window is being raised. In one example, the spring associated with a top sheath has a stiffness of about at least 10N/mm, and is fully compressed only in response to a compression force of about at least 250 Newtons. The spring constitutes a shock absorber in case of a strong impact, transforming it into a relatively mild impact, thereby providing more time for the electronic circuit controlling the anti-pinch system to intervene and reduce the pinch force.
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