Roller shade with a counterbalancing device

US11466514B2 · kind B2 · utility

Assignee

• Hunter Douglas Industries B. V. · NL

Inventors

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

Key dates

• Filing date: Oct 30, 2018
• Grant date: Oct 11, 2022
• Expiry date: May 30, 2041

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E06B9/90
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A counterbalancing device for a roller shade having a flexible sheet member and a roller shaft coupled to the flexible sheet member includes a stationary rod extending within the roller shaft, with the rod including a first end and a second end opposite the first end. The counterbalancing device also includes a rod adjuster coupled to the first end of the stationary rod and a spring winder positioned adjacent to the first end of the stationary rod. The rod adjuster is configured to selectively rotate the stationary rod and the spring winder is configured to rotate with the roller shaft. Additionally, the counterbalancing device also includes a spring having a first spring end coupled to the spring winder such that the first spring end rotates with the spring winder, and a second spring end coupled to the stationary rod such that the second spring end rotates with the stationary rod.