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:
Jul. 26, 2011
Filed:
Dec. 20, 2007
Yu-che Wen, Gueishan Township, Taoyuan County, TW;
Chih-yao Chang, Taichung, TW;
Yu-Che Wen, Gueishan Township, Taoyuan County, TW;
Chih-Yao Chang, Taichung, TW;
Nien Made Enterprise Co., Ltd., Taichung, TW;
Abstract
A cordless window blind structure is provided. A movable seat having a pulley block and a cord-winding assembly is disposed within a head rail of the cordless blind. The pulley block is connected to a lift cord wound through a first positioning element, so as to control the opening and closing of a blind body. And the cord-winding assembly has a cord winder attached to one end of a retrieving cord and a torsion spring. The other end of the retrieving cord is fastened either on the head rail, the movable seat, a second positioning element, or an end cap. The structure of the second positioning element is resembled to the first positioning element. By taking one end of the retrieving cord as a pivot, the movable seat moves laterally therealong the head rail by a restoring force generated through the torsion spring.