Block and tackle window balance with bottom guide roller
US7669284B2 · kind B2 · utility
2Cited by
31References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 23, 2008 |
| Grant date | Mar 2, 2010 |
| Priority date | — |
| Expiry date | Mar 15, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S16/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Disclosed are apparatus for a block and tackle window balance to be incorporated in single and double hung window assemblies. In one embodiment the block and tackle window balance includes a roller secured within a bottom guide to increase range of travel of a window sash.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.