Air to fuel ratio adjustment device for sealed-combustion type fireplaces
US5553603A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1995 |
| Grant date | Sep 10, 1996 |
| Priority date | — |
| Expiry date | Apr 25, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24C3/004
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A sealed-combustion chamber fireplace includes a combustion air to fuel adjustment device comprising an primary air-fuel mixing body having a fuel source inlet at one end and at least one combustion air inlet port disposed through a wall portion of the body. The air-fuel mixture body may be configured in the form of an air-fuel venturi, burner tube and the like to effect mixing together of the air and fuel to form a combustible air-fuel mixture. An air inlet port cover is movably disposed adjacent the air-fuel mixing body and forms an adjustable air combustion aperture by placement of the cover adjacent the air inlet port. Movement of the cover about the body effects opening or closing of the aperture, thereby effecting adjustment of the primary air to fuel ratio of the air-fuel mixture combusted in the combustion chamber. A cover arm is attached to the cover and an actuator arm is movably attached to the cover arm to facilitate adjustment of the aperture, thereby, permitting adjustment of the flame appearance during operation of the fireplace from a position outside of the fireplace.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.