Electricity: motive power systems – Automatic and/or with time-delay means – Movement – position – or limit-of-travel
Reexamination Certificate
2008-01-15
2008-01-15
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Automatic and/or with time-delay means
Movement, position, or limit-of-travel
C200S061430, C049S027000, C324S686000, C073S780000
Reexamination Certificate
active
07319301
ABSTRACT:
A proximity sensor for sensing an object in the path of or proximate to a closure panel such as a vehicle window. First and second electrodes encased in a non-conductive casing are mounted on the metallic structure near the closing edge of the aperture. The two electrodes define a capacitance CE1/2therebetween, and parasitic capacitances CE1and CE2between the first electrode and chassis ground and the second electrode and chassis ground, respectively. A controller cyclically connects (1) the second electrode to a voltage reference source (Vref1) and the first electrode to chassis ground and (2) the second electrode to chassis ground and the first electrode to the reference capacitor, thereby periodically charging the capacitance CE1/2and transferring the charge stored thereon to the reference capacitor whilst short-circuiting the parasitic capacitances. The charge on the reference capacitor, the time period required to charge the reference capacitor to a specified voltage, or a calculated value for CE1/2are then compared against a reference value in order to derive an obstruction signal.
REFERENCES:
patent: 4453112 (1984-06-01), Sauer et al.
patent: 4983896 (1991-01-01), Sugiyama et al.
patent: 5621290 (1997-04-01), Heller et al.
patent: 6377009 (2002-04-01), Philipp
patent: 6472835 (2002-10-01), Ogasawara
patent: 6700393 (2004-03-01), Haag et al.
patent: 6750624 (2004-06-01), Haag et al.
patent: 6782759 (2004-08-01), Shank et al.
patent: 3513051 (1986-10-01), None
patent: 4036465 (1991-05-01), None
patent: 4004353 (1991-08-01), None
patent: 4416803 (1994-11-01), None
patent: WO 00/44018 (2000-07-01), None
patent: WO 02/101929 (2002-12-01), None
English Abstract of DE 4004353 A1.
English Abstract of DE 4036465 A1.
English Abstract of DE 4416803 A1.
English Abstract of DE 3513051 A1.
Clark Hill PLC
Intier Automotive Closures Inc.
Ro Bentsu
LandOfFree
Differential anti-pinch capacitive sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Differential anti-pinch capacitive sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differential anti-pinch capacitive sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2811299