Control and motorization system
US6708750B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2001 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Dec 26, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/2627
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system for effecting and controlling the movement of a window covering between different positions. In particular, the present invention includes a motor coupled to a window covering by way of a drive assembly. The drive assembly includes one or more hollow shafts, a drive shaft, and a torque sensing mechanism. The drive shaft is coupled between the motor and a hollow, sliding shaft by way of the torque sensing mechanism. Rotation of the motor causes a lift cord to wind or unwind from the hollow sliding shaft wherein the frictional engagement of the lift cord against the hollow, sliding shaft causes the shaft to slide. Additionally, the present invention includes a method for detecting and responding to disturbances in force sensing devices coupled to the lift cord.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.