The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 05, 1999
Filed:
Jan. 28, 1997
Albert Y Chang, Brookfield, WI (US);
Michael G Taranowski, Greendale, WI (US);
Brian T Pier, Milwaukee, WI (US);
James E Hansen, Oak Creek, WI (US);
Ruth E Hubbell, Milwaukee, WI (US);
Lewis J Gohde, Sussex, WI (US);
Edward J Hummelt, Wauwatosa, WI (US);
Richard A Baumann, Franksville, WI (US);
Peter J McGinnis, Brookfield, WI (US);
Arlene M Klumb, Richfield, WI (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A system for enabling a vehicle operator to control the speed or rate of raising and lowering of a powered lift window. The actuator or switch includes a pressure responsive variable impedance device comprising a variable resistance in one embodiment and a variable capacitance in another embodiment. Increasing force directly on the variable impedance device by the user's finger or an actuator decreases the impedance which is sensed by a voltage divider which outputs a voltage which increases with increasing force. This latter voltage is compared with the output of a triangle wave oscillator and the output of the comparator is a pulse width modulated signal with pulse-width proportional to applied force. The pulses are applied to a power device (Mosfet) which modulates the duty cycle (%) of the current to the window lift mechanism drive motor to give variable motor speed.