Multi-coil spring window counterbalance assembly
US7047693B2 · kind B2 · utility
4Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 16, 2004 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Nov 16, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/132
- 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 connect any desired number of coil springs 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 rotates into an interior portion of the window to allow simple and easy connection to the counterbalance connector and then retracts into the weight pocket in a recessed position for normal operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.