Block and tackle window balance with bottom guide roller
US7155778B2 · kind B2 · utility
5Cited by
31References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 4, 2005 |
| Grant date | Jan 2, 2007 |
| Priority date | — |
| Expiry date | Jan 4, 2025 |
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.