Apparatus and method for controlling a damper in a gas-fired appliance
US8113823B2 · kind B2 · utility
29Cited by
13References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 29, 2008 |
| Grant date | Feb 14, 2012 |
| Priority date | — |
| Expiry date | May 11, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N2241/04
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A damper mechanism for a gas-fired appliance is disclosed. The damper mechanism is mechanically operated in response to changes in pressure within a portion of the appliance. Changes in gas pressure operate to displace a diaphragm, thereby moving a linkage attached to a flue damper, such that the damper can be moved between open and closed positions. An interim damper control activation arm can pivot in response to movement of the linkage to actuate electrical switches, which act to close a magnetic pilot valve when the damper is in a partially-opened or partially-closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.