Gas appliance such as a thermal weed sprayer
US6190161A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1999 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Dec 22, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23D2207/00
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A piezoelectrically-ignited gas appliance comprises a fuel regulator assembly, a burner assembly attached to the fuel regulator assembly, and a piezoelectric ignition assembly partially within the burner assembly. The burner assembly includes a transfer pipe assembly, an air/fuel mixing assembly, and a combustion assembly. The transfer pipe assembly has a proximal end attached to the air/fuel mixing assembly and a distal end attached to the combustion assembly. The an air/fuel mixing assembly has an air opening formed at the proximal end and a fuel injector formed within the proximal end and in fluid communication with the fuel regulator assembly. The combustion assembly has a combustion nozzle and combustion flange attached to the distal end. The piezoelectric ignition assembly includes an piezoelectric charge generator coupled by a thermally and electrically-insulated, semi-rigid conductive wire within the transfer pipe assembly to an electrode. The electrode has a stripped tip protruding from a terminal branch midway along the transfer pipe assembly. Prior to forming the terminal branch, the wire forms a bent part having at least two bends bracing the wire against the transfer p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.