Glow plug manufacture
US4312120A · kind A · utility
15Cited by
7References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 22, 1980 |
| Grant date | Jan 26, 1982 |
| Priority date | — |
| Expiry date | May 22, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49934
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The invention is a method of making a pressure tight seal for a glow plug characterized by applying a high current to heat a groove (31) in the outer shell (3) of a glow plug while simultaneously pressing together the sealing elements adjacent the groove i.e. an insulator (2), a gasket (1), the flared end (42) of a protective tube (4) and a shoulder (32) within the shell (3). The grooves (31) concentrates the heat and allows the shell to be compressed around the elements of the seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.