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US 2012/0068390 A1Published application
Ceramic Spark Plug Insulator And Method Of Making
OwnerWilliam John Walker, JR.inventor
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Abstract
A method of making a spark plug insulator includes forming green ceramic core tube and core nose performs. The core nose perform is nested within the firing end of the core tube perform and they are fired to sinter them and to form a direct bond between them in a region of overlap.
Claims7
A method of making a spark plug insulator, comprising the steps of:
- forming a green ceramic core tube preform having a terminal end, a firing end and an inner bore preform;
- forming a green ceramic core nose tube preform;
- nesting the core nose tube preform within the firing end of the core tube preform to form an overlap between them;
- and
- firing the core tube preform and the core nose tube preform at a temperature and for a time sufficient to sinter them and form a direct bond between them in the overlap to form the sintered spark plug insulator body.
2 more elements
Dependencies are inferred from the claim text.