Motorized window blind with manual overrride
US4934438A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1988 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Jun 20, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/285
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A motorized window blind operator is slidably received in a mounting bracket in the plane of the blind in a window frame. A motor in the operator housing normally opens and closes the blind but can be overridden by a manually operated gear train utilizing a screw driver extending through a hole in the inner window pane into engagement with a slotted hub on a gear in the housing. An upstanding flange on the housing overlaps with the adjacent blind slat to prevent light passing therethrough when the blind is closed. The housing has a V-shaped vertical end which receives the ends of the blind slats which have a similar shape for preventing light passage therebetween.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.