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. 15, 2014
Filed:
Feb. 04, 2010
Applicants:
Jorg Bohlen, Langen, DE;
Lars Koop, Bremerhaven, DE;
Inventors:
Jorg Bohlen, Langen, DE;
Lars Koop, Bremerhaven, DE;
Assignee:
Hunter Douglas Industries BV, Rotterdam, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A47G 5/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A roller blind including a roller of having a roller length and a roller outer diameter, a fabric attached to said roller for winding and unwinding from said roller. The fabric has a fabric length, a fabric weight, a fabric height, and fabric thickness. The blind includes a bottom bar having a bottom bar weight, and at least one spring operatively connected to the roller to drivingly rotate the roller in at least one direction of rotation. The spring is selected according to a Protocol such that it's length ensures that it drives the roller with a constant operating force.