Operating system for an architectural covering
US8474509B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 4, 2008 |
| Grant date | Jul 2, 2013 |
| Priority date | — |
| Expiry date | Jun 16, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B9/78
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Operating system (1) for rotatably controlling retraction and deployment of an architectural covering. The operating system includes a drive pulley wheel (3) having a circumferential rim (5), a length of looped drive cord (9) operatively engaged with the pulley wheel (3) about its circumferential rim (5) and having depending portions on opposite sides of the pulley wheel (3), a cover (7) co-extensive with a portion of the circumference of the pulley wheel (3) and at least one stopper (19) attached to a portion of the length of the drive cord (9) and adapted to engage the cover (7) to stop rotation upon a predetermined amount of rotation of the pulley wheel (3). The pulley wheel is provided with a cavity (17) on its toothed circumference for receiving the at least one stopper (19) to prevent it from engaging the cover (7).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.