The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 05, 2001
Filed:
Feb. 09, 2000
Yuichi Miwa, Tokyo, JP;
Yugengaisha Misuzu, Tokyo, JP;
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 against a force exerted by the spring a one preceding runner is stacked on a following runner.