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:
May. 11, 2021
Filed:
Nov. 16, 2018
Hunter Douglas Industries B.v., Rotterdam, NL;
Jörg Bohlen, Langen, DE;
Lars Koop, Bremerhaven, DE;
HUNTER DOUGLAS INDUSTRIES B.V., Rotterdam, NL;
Abstract
In one aspect, a spring assist module for a covering includes a torsion spring that is selected according to a protocol such that the torsion spring drives a driven part of the covering with a constant operating force. In another aspect, a roller blind includes a roller and a torsion spring operatively coupled to the roller, with the torsion spring having a spring characteristic(s) selected according to a protocol that matches the spring characteristic(s) to a torque curve associated with the roller blind to drive the roller with a constant operating force. In a further aspect, a method for selecting a spring for use within a roller blind includes determining a parameter(s) of the roller blind, determining a torque curve for the roller blind based at least partially on the parameter(s), and selecting a spring characteristic for a torsion spring of the roller blind that matches the torque curve.