Inverted constant force window balance for tilt sash
US9133656B2 · kind B2 · utility
14Cited by
66References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2011 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Aug 23, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/148
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A window balance may include a shoe body with an elongate portion and an enlarged portion. The elongate portion may include at least one carrier section for supporting a coil spring and an enlarged portion may include a locking element and a cam in communication with the locking element. The width of the enlarged portion may be greater than the width of the elongate portion. The spring may rest in the carrier section and may be secured to a window jamb with a fastener or a mounting element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.