Windup window shade with a amplified drive mechanism

US6520239B2 · kind B2 · utility

Assignee

• BOS GMBH & CO. KG · DE

Inventors

• Werner Schlecht · Aurich, DE
• Herbert Walter · Großenhain, DE

Key dates

• Filing date: Nov 21, 2001
• Grant date: Feb 18, 2003
• Expiry date: Nov 21, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60J1/208
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A windup window shade is provided with windup window shade means which, in the extracted state, make possible different degrees of opacity at the window. To this end, two window shade web are wound on separate windup shafts. Two window shade webs are wound onto separate windup shafts for this purpose. Only a single drive motor is required for the selective extension of one or the other window shade web.