Chain operator for a window
US4521993A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1983 |
| Grant date | Jun 11, 1985 |
| Priority date | — |
| Expiry date | Aug 8, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2186
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A chain operator for a window, and particularly a skylight window, having a casing with a chain storage area from which a chain can be advanced for opening of the window. The casing is constructed for mounting of different types of drive mechanism for a chain drive sprocket within the casing. A unitary liner is fitted within the casing to provide a reduced friction mounting for the drive sprocket and a reduced friction guide for the chain, with the liner being positioned in high load and high wear areas to result in smooth and quiet long-life operation. The chain operator has a chain composed of solid links pivotally interconnected by U-shaped links and interrelated in a manner to readily move between straight and curved configurations and operate under relatively heavy load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.