Cord winding device for a blind
US6918424B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Nov 21, 2003 |
| Grant date | Jul 19, 2005 |
| Priority date | — |
| Expiry date | Nov 21, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/3225
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cord winding device includes a cord adapted to lift and lower a blind, a winding screw which is rotatable for winding and unwinding the cord and which has a screw thread portion, and a guide body sleeved on the winding screw. The guide body and the winding screw make an axial movement relative to each other upon rotation of the winding screw. The guide body includes an inner thread threadedly engaging the screw thread portion, and a cord-pulling member formed with a hole. The cord passes through the hole, and has one end fixed to the winding screw. The cord is pulled by the cord-pulling member to be wound up around the screw thread portion upon rotation of the winding screw.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.