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:
Dec. 04, 2001
Filed:
Apr. 17, 2000
Nicolaas Dekker, Bergschenhoek, NL;
Antonius Johannes Josephus Horsten, Den Haag, NL;
Abstract
A cord spool for an architectural covering, such as a Venetian blind, having a rotatable central shaft for opening and closing the covering. The cord spool includes a circumferential surface, about which an operating cord can be wound that can be driven in opposite directions to open and close the covering. The spool is arranged so as to regulate or prevent an F(pull) gradient when pulling on one end of the operating cord to open the covering; and has a variable coupling connected to the central shaft and the circumferential surface for automatically actuating the regulating or preventing operation when the torque on the central shaft, exerted by the window covering, is greater than the torque on the circumferential surface, exerted by the operating cord as it is being pulled to open the covering.