Patent · US Expired

Lateral-traction roller shade

US4535830A · kind A · utility

13Cited by

3References

8Claims

0Family size

Assignee

Zundwarenfabrik Starcke GmbH & Co. · DE

Inventors

Hans Appel · Penzberg, DE
Hermann Heidenescher · Melle, DE

Key dates

Filing date	Aug 31, 1983
Grant date	Aug 20, 1985
Priority date	—
Expiry date	Aug 31, 2003

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE06B2009/905
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

One end of the retraction spring of a lateral-traction roller shade is fastened to an interior rod that is stationary once it has been installed. The other end of the spring is fastened to a carrier bushing that rotates on the interior rod. The shaft of the shade is attached to the bushing and one end of a retention and clamping spring that surrounds the rod is fastened inside the bushing in such a way that the spring will rotate along with it. The other end of the spring is positioned in the path traveled by a drive segment on a sheave when the shade is lowered and in front of a drive rib on the bushing that is also positioned in the path. The raising of the shade is thus facilitated by the retraction spring.

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