Fuel delivery system for fuel-burning heater and associated components
US5372484A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1992 |
| Grant date | Dec 13, 1994 |
| Priority date | — |
| Expiry date | Nov 2, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23G2209/102
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An oil-burning furnace including a combustion zone and a nozzle block assembly through which oil and pressurized air are introduced into the combustion zone utilizes an oil pump of trochoidal design for delivering oil to the combustion zone at a metered rate and a purge control for withdrawing oil from the nozzle block assembly upon shut down of the furnace operation. The flow rate at which the oil pump delivers the oil to the nozzle block assembly is relatively constant regardless of the weight or viscosity of the oil burned by the furnace, and the purge control cooperates with an air compressor used for delivering air, under pressure, to the nozzle block assembly and includes an expandable zone for extracting oil from the nozzle block assembly upon a de-energizing of the air compressor. The nozzle block assembly also includes a block providing an air passageway through which air is pumped from the air compressor into the combustion zone and an electric heating element disposed within the air passageway for heating air routed therethrough. Thermostats mounted within the nozzle assembly block ensure that the block is maintained within a preselected temperature range from the outset…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.