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:
Jan. 30, 2007
Filed:
Sep. 29, 2004
Chin-fu Chen, Taichung, TW;
Chin-Fu Chen, Taichung, TW;
Other;
Abstract
A cordless activating device for a venetian blind has a central reeling device, two string-guides and a main string. The central reeling device has a U-shaped mounting bracket, a resilient coiling device and a clutch. The resilient coiling device comprises a spring spool, a take-up reel and a specifically designed S-shaped recoiling spring. The clutch selectively locks the resilient coiling device in place and activates the resilient coiling device. The string-guides are mounted on opposite ends of the central reeling device. The main string is attached to and controlled by the central reeling device, is wound around the two string-guides and the resilient coiling device and is connected to two draw strings that extend down through the venetian blind. When the clutch activates the resilient coiling device, the resilient coiling device winds the main string onto the take-up reel, and the venetian blind automatically rises.