Window blind opening and closing device
US6240998A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 9, 2000 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Feb 9, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S160/90
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A window blind opening and closing device can permit sequential drawing of louvers in a louver group from an end runner side opposite to the prior art to solve problems of damaging of runners and a drive shaft due to wearing, provide good appearance, and can open and close the window blind without interference even with the window blind using shaped louver in reversed S-shaped configuration in cross section. The opening and closing device includes a runner driving endless belt for driving the runners, runner connecting portions provided with a given interval on the runner driving endless belt, belt connecting pins provided in respective runners and movable between engaging positions to engage with the runner connecting portions and retracted positions released away from the runner connecting portions, springs for biasing respective of the belt connecting pins to the engaging positions for engaging with the runner connecting portion, receptacle openings on rear surfaces of respective runners, and belt connecting pins actuating projections provided on front surfaces of the runners and entering into the receptacle openings for driving the belt connecting pins to the retracted position…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.