Patent · US Active

Spring system for roller blinds

US10030442B2 · kind B2 · utility

3Cited by

36References

18Claims

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	Jul 24, 2018
Priority date	—
Expiry date	Jun 19, 2034

Classification

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

Abstract

A spring assist module for window covering includes a stationary member, at least one torsion spring, and at least one rotatable member. The stationary member may be connectable to an operating member of the window covering. The at least one rotatable member may be keyable to a driven part of the window covering, such that rotation of the driven part rotates the at least one rotatable member. The at least one torsion spring may include a first end operatively coupled to the stationary member and a second end operatively coupled to the at least one rotatable member. The spring assist module may be pre-assembled as a self-contained unit.

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