Device for detecting an obstacle in the opening range of a...

Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...

Reexamination Certificate

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Details

C340S426270, C340S561000, C340S562000

Reexamination Certificate

active

07046129

ABSTRACT:
A device for detecting an obstacle in the opening range of a movable closure element (13), more particularly an electrically powered window pane (13) or sunroof of a motor vehicle (10), comprises a sensor electrode (20), a base electrode (21) spaced away from the sensor electrode (20), and a control unit (40) connected to the sensor electrode (20) and the base electrode (21). The sensor electrode (20) and the base electrode (21) generate an electric field (F) in the opening range of the closure element (13) and are spaced away at a constant distance from each other in a first operational mode. The control unit (40) detects in the first operational mode a change in capacitance caused by the presence of an obstacle in the electric field (F) and providing at least one control signal (Is, Ip) for a drive (50) powering the closure element (13). The device is characterized by high reliability in operation and availability. The reason for this is that the control unit (40) provides in a second operational mode a control signal (Is) for the drive (50) powering the closure element (13) when the sensor electrode (20) comes into electrical contact with the base electrode (21).

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patent: 6337549 (2002-01-01), Bledin
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patent: 197 24 952 (1997-12-01), None
patent: 19906562 (1999-08-01), None
patent: 19913105 (2000-10-01), None
patent: 0638701 (1995-02-01), None
patent: 0648628 (1995-04-01), None
patent: 0 856 425 1 (1998-08-01), None
patent: 1154110 (2001-11-01), None
patent: 2 301 622 (1996-12-01), None
patent: 2 340 662 (2000-02-01), None
patent: 10-110 574 (1998-04-01), None
patent: 2000-177380 (2000-06-01), None
English language abstract of DE 4320548.
English language abstract of DE 19906562.
English language abstract of DE 19913105.
English language abstract of EP 0638701.
English language abstract of EP 0648628.
English language abstract of EP 1154110.

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