Cord lock for a venetian blind or a shade
US4982776A · kind A · utility
8Cited by
10References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1989 |
| Grant date | Jan 8, 1991 |
| Priority date | — |
| Expiry date | Feb 23, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T24/394
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cord lock for a venetian blind or shade, such as a pleated shade, having a housing with a stationary pulley and a serrated cam or rivet guided in parallel, aligned S-shaped slots, the cam locking the raised lift cord of the blind or shade against the pulley. The S-shape of the slot maximizes the angle of approach of the slot with respect to the cord and pulley to thereby increase the sensitivity of the lock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.