Patent · US Active

Spring system for roller blinds

US10138678B2 · kind B2 · utility

2Cited by

32References

19Claims

0Family size

Assignee

Hunter Douglas Industries B. V. · NL

Inventors

Jorg Bohlen · Langen, DE
Lars Koop · Bremerhaven, DE

Key dates

Filing date	Jun 19, 2014
Grant date	Nov 27, 2018
Priority date	—
Expiry date	Apr 26, 2035

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE06B9/74
WIPO fieldCivil engineering
WIPO sectorOther fields

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.