Tensioning device for cable window lifter
US4984386A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1990 |
| Grant date | Jan 15, 1991 |
| Priority date | — |
| Expiry date | Apr 25, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/55
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention concerns a tensioning device for the cable of a cable window lifter which is mounted in a drive bracket pulled up and down along a guide rail by means of a cable wound around an actuation drum. One cable end is solidly joined to the drive bracket whereas the other cable end is connected by a directional lock to the drive bracket. This directional lock compensates any cable elongation taking place within the cable actuation system by means of spring action. The tensioning device of the invention is characterized by providing further compensating means. This further compensation is needed in the event of excessive stresses exerted on the cable actuation system in the closed window position which results in a spurious cable elongation caused thereby. It also eliminates this compensation when this excess stress is no longer present. These further compensation means may consist of a spring additionally inserted between the free cable end and the directional lock; however they may also consist of a tippable and displaceable molded part inside the directional lock. The spring compensates the spurious cable elongation by relaxing before the actual compensation spring becomes …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.