Platinum alloy for spark plug electrodes and spark plug having a platinum alloy electrode
US8106573B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2010 |
| Grant date | Jan 31, 2012 |
| Priority date | — |
| Expiry date | Apr 15, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T13/39
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spark plug and an alloy for an electrode tip of a spark plug is disclosed herein. The spark plug having: an insulator shell; a center electrode inside the insulator shell such that one end of the center electrode protrudes from the insulator shell; a metal shell exterior to the insulator shell; a side ground electrode having one end coupled to the metal shell and the other end facing the protruding end of the center electrode to form a spark discharge gap between the center electrode and the side ground electrode; and an electrode tip secured to at least one of the side ground electrode or the center electrode, located at the spark discharge gap, the electrode tip comprising a platinum-based alloy comprising 20 to 35% by weight of palladium, from greater than 0 to 15% by weight iridium, and the balance of the alloy being platinum, all % by weight being based on the total weight of the alloy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.