Coil spring counterbalance
US8136301B2 · kind B2 · utility
2Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 24, 2009 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Apr 4, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05D13/1276
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Disclosed is a pivotable, multi-coil spring counterbalance, and method for using the same, which allows the user to readily attach a desired number of coil springs having chosen forces to a counterbalance connector attached to a vertically movable member, thereby providing an offset for at least a portion of the weight thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.