Method for coating spark plug threads with a polytetrafluoroethylene mixutre
US9231384B2 · kind B2 · utility
0Cited by
5References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 19, 2013 |
| Grant date | Jan 5, 2016 |
| Priority date | — |
| Expiry date | Aug 29, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T13/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method for coating spark plug threads with a polytetrafluoroethylene mixture comprising the steps of (a) bringing the spark plug to room temperature of 21° C. to 26° C. (70° F. to 79° F.); (b) mixing the polytetrafluoroethylene mixture thoroughly and filtering the material through a 100-mesh stainless steel screen (0.146 mm openings); (c) applying a minimum dry film thickness of 20 microns to 30 microns (0.8 mil to 1.2 mil) to the spark plug thread; and (d) baking the spark plug for 15 minutes at a metal temperature of 232° C. to 260° C. (450° F. to 500° F.).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.