Patent · US Active

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

US7571756B2 · kind B2 · utility

20Cited by

10References

12Claims

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	Dec 14, 2007
Grant date	Aug 11, 2009
Priority date	—
Expiry date	Dec 14, 2027

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.