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:
Nov. 27, 2018
Filed:
Jun. 19, 2014
Applicant:
Hunter Douglas Industries B.v., Rotterdam, NL;
Inventors:
Jorg Bohlen, Langen, DE;
Lars Koop, Bremerhaven, DE;
Assignee:
Hunter Douglas Industries B.V., Rotterdam, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E06B 9/62 (2006.01); E06B 9/68 (2006.01); E06B 9/42 (2006.01); E06B 9/74 (2006.01);
U.S. Cl.
CPC ...
E06B 9/62 (2013.01); E06B 9/42 (2013.01); E06B 9/68 (2013.01); E06B 9/74 (2013.01);
Abstract
A method of selecting one or more springs for a roller blind is provided. The method may include determining one or more parameters of the blind, determining a torque curve of the blind based on the one or more parameters of the blind, and selecting one or more springs having a wire diameter and a spring diameter. The method may further include determining a length of the one or more springs based on the torque curve, the wire diameter of the one or more springs, and the spring diameter of the one or more springs to ensure the blind operates with a constant operating force.