Spark plug used for cogeneration purpose and adjusting method for discharging gap thereof
US6603246B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 2001 |
| Grant date | Aug 5, 2003 |
| Priority date | — |
| Expiry date | Jun 6, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T21/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A noble metal tip of a grounding electrode is inclinedly disposed with respect to a noble metal chip of a central electrode by an angle &agr; so that a discharging gap is narrow at a side closer to one end of the grounding electrode and wide at the opposite side closer to the other side of the grounding electrode. When the discharging gap has expanded to a certain extent due to exhaustion of the noble metal tips of the electrodes, the re-gapping adjustment is performed to decline or push the noble metal tip of the grounding electrode toward the noble metal tip of the central electrode so as to decrease the angle &agr;. Thus, the discharging gap can be adjusted to an adequate value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.