Roller shade clutch with internal gearing
US6685592B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2003 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Mar 20, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/905
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A bi-directional clutch for operating a window dressing such as a roller shade includes a protective guard for securing the window dressing to a stationary structure, a gear box for transmitting rotation to an output member in response to the operation of an elongated operating member such as a cord, and an antirotational member that prevents the undesirable operation of the output member. The output member is coupled to the window dressing. The gear box includes a gear pulley coupled to the elongated operating member, a planetary gear and a stationary gear. The gear box is arranged and constructed to transmit motion to the output member in response to the activation of the elongated operating member, at a predetermined mechanical advantage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.