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:
Apr. 17, 1990
Filed:
Sep. 21, 1989
Cheng-Hsiung Chen, Pei-Tun Dist. Taichung City, TW;
Other;
Abstract
A venetian blind includes a superposed series of horizontal slats suspended one above another, a bottom rail disposed below the slats, and two angle-controlling devices disposed at two end portions of the series of slats. Each of the angle-controlling devices includes a rotatable pulley disposed above the slats and provided with an annular groove, two tilting cords respectively connected to two sides of each of the slats, and a coiled spring sleeved tightly on the pulley within the annular groove which has two ends to which the top ends of the tilting cords are respectively fastened. The bottom rail is attached to the bottom ends of the tilting cords. When the pulleys are rotated to a predetermined position, one end of each of the springs is moved radially outward due to the downward pull of the bottom rail, so that the springs are loosened from the pulleys.