Ladder drum for venetian blind
US7665503B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 12, 2007 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Jan 27, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T24/3936
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A ladder drum is mounted in a head rail of a Venetian blind for securing a ladder cord thereto, and includes a drum body installed on a tilt bar of the blind. An upper portion of the drum body is formed into an open-topped recess, which has two sidewalls interconnected by an end wall. A holder set is provided in the recess, such that a clearance is existed between the holder set and each of the sidewalls and a limiting space between the holder set and the end wall for receiving a securing element therein. The securing element is a rectangular frame has a rear end turnably received in the limiting space and a front end releasably engaged with a front side of the holder set to thereby firmly press two free ends of the ladder cord in the drum body against the two sidewalls of the recess.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.