Patent · US Active

System for operating top down/bottom up covering for architectural openings

US8020602B2 · kind B2 · utility

29Cited by

26References

5Claims

0Family size

Assignee

Hunter Douglas Inc. · US

Inventors

Stephen P. Smith · Acton, US
Kent A. Smith · Broomfield, US
James L. Miller · Thornton, US
Terrence M. Drew · Boulder, US
Suzanne M. Fujita · Louisville, US

Key dates

Filing date	Jul 2, 2009
Grant date	Sep 20, 2011
Priority date	—
Expiry date	Oct 26, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24942
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A control system for a top down/bottom up covering for an architectural opening includes a common drive shaft for raising and lowering a middle rail and a bottom rail between which a flexible shade material extends. A control element operates a spool lift system and a roller lift system, with the spool lift system being associated with the middle rail and the roller lift system being associated with the bottom rail. The lift systems are sequentially operated when the drive shaft is driven in either direction by the control element.

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