Electric window regulator having a spring for increasing the time in which an anti-pinching system can operate
US6502352B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 23, 1999 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Nov 23, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/55
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A motor vehicle power-operated window lift, comprises a mechanism for driving the window, an electric motor (3), an anti-pinch system which can be triggered when there is an obstacle obstructing the window travel, and an electronic circuit for controlling the motor and the anti-pinch system. The window lift comprises a spring to reduce the pinch force when the window is being raised. In one example, the spring associated with a top sheath has a stiffness of about at least 10N/mm, and is fully compressed only in response to a compression force of about at least 250 Newtons. The spring constitutes a shock absorber in case of a strong impact, transforming it into a relatively mild impact, thereby providing more time for the electronic circuit controlling the anti-pinch system to intervene and reduce the pinch force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.