Multi-coil spring window counterbalance assembly
US7506475B2 · kind B2 · utility
4Cited by
1References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 6, 2006 |
| Grant date | Mar 24, 2009 |
| Priority date | — |
| Expiry date | May 14, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/148
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Disclosed is a multi-coil spring assembly that is mounted in the weight pocket of a vertically operating window. The multi-coil spring assembly allows the user to attach a desired number of multi-coil springs having chosen constant forces to the counterbalance connector to provide the desired amount of counterbalance force to the sash of a vertically operating window. The multi-coil spring assembly may be rotated into an interior portion of the window to permit straightforward attachment to the counterbalance connector and then retracted into the weight pocket in a recessed position for normal window operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.