Window blind activator
US5184660A · kind A · utility
64Cited by
6References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 1, 1991 |
| Grant date | Feb 9, 1993 |
| Priority date | — |
| Expiry date | Nov 1, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/3225
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A device for raising and lowering window blind fabrics. The device has a hollow take-up tube disposed around and threadably engaged to a stationary guide. A cord is connected at its one end to the take-up tube and at its other end to the blind fabric. The take-up tube is rotated to wind or unwind the cord. A drive core rotatably disposed within a bi-directional friction brake, the drive core connected to the take-up tube, the bi-directional friction brake being fixed to the headrail. When the cord is wound around the take-up tube, the blind fabric is raised. When the cord is unwound, the blind fabric is lowered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.