Movable-window safety device

US5621290A · kind A · utility

Assignee

• Draftex Industries Limited · GB

Inventors

• Norbert Heller · Grefrath, DE
• Klaus Hanndorf · Krefeld, DE
• Alfons Stockschlager · Viersen, DE

Key dates

• Filing date: Jul 19, 1996
• Grant date: Apr 15, 1997
• Expiry date: Jul 19, 2016

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E05Y2900/55
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A window glass in a motor vehicle body is slidable in a vertical direction within a window frame by means of an electric motor controlled by "up" and "down" switches. The window glass slides with reference to a window guide channel. The window guide channel incorporates a metal carrier or other electrical conductor which receives the output from electrical oscillating means. If a human hand, or other part of the human body, is present within the frame of the window, when the window is open, and within a predetermined distance from the window guide channel, the resultant capacitive effect will change the output of the oscillator. This output change is detected by a detecting unit and opens a switch. This switch is connected in series with the "up" switch for the window drive motor and thus either stops the motor, if it is driving the window glass upwards, or prevents the window glass from being so driven.