Patent · US Expired

Circuit arrangement for power windows

US4347465A · kind A · utility

41Cited by

7References

1Claims

0Family size

Assignee

ITT Industries · US

Inventors

Horst Goertler · Sachsenheim, DE
Friedrich Hetzel · Mühlacker, DE
Uwe Knobloch · Heilbronn, DE
Hans Muller
Hans Prohaska · Bietigheim-Bissingen, DE
Horst Rachner · Bietigheim-Bissingen, DE
Wolfgang Spieth · Freiberg, DE

Key dates

Filing date	Jul 7, 1980
Grant date	Aug 31, 1982
Priority date	—
Expiry date	Jul 7, 2000

Classification

Technology area (CPC H)Electricity
CPC primaryH02H7/0854
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A safety control circuit for electric motors of power windows of automotive vehicles and which differentiates between a tight fitting of the window pane and an obstacle blockage. The motor current is selectively detected to provide a signal representative of the instantaneous rather than static current values. The detected signal is compared to a reference signal. When the detected signal exceeds the reference signal by a given value or longer than a predetermined interval, which indicates that an obstacle blockage has occurred, the motor current is switched off or reversed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.