Chain operator for windows
US5406750A · kind A · utility
6Cited by
14References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 12, 1993 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | May 12, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/20
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An operator for a window has a chain as an operating member, a sprocket wheel for advancing and retracting the chain, and a counterbalancing spring operatively connected to a shaft of the sprocket wheel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.