Power window transmission
US5810687A · kind A · utility
Inventor
Key dates
| Filing date | May 22, 1997 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | May 22, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/55
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A power window transmission includes a loop-like endless chain (12) surrounding and engaging opposed driving and driven sprocket (20, 18). The driving sprocket (20) is mechanically coupled to a motor (26) and the driven sprocket (18) is driven by the chain (12) to drive window crank handle shaft coupled thereto to operate the window. The sprockets (18, 20) are encased in separate and individual casings (32, 34) each of which is fixed to the car door structure with a bracket (64) provided with stepless-adjustable fastening device (68) fastened precisely to the car door structure. The sections of the chain located outside the sprocket casings (32, 34) are enclosed in flexible tubes (80) incorporating spring-based slack take-up device (81) arranged between an end of each of the tubes (80) and one of the sprocket casings (32, 34) to take up slacks of the tubes (80) following the change of length of the chain (12). The casings (32, 34) are also provided with lips (40) located around the inner rims thereof to support the sprocket (18, 20) against the thrusts applied thereto by the motor shaft and the window crank handle shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.