Back to results
US 2003/0116660 A1Published application
Nozzle insert for dual mode fuel injector
AssigneeCaterpillar Inc.
InventorsJoseph Angelino, Scott F. Shafer, Charles Bates, Jay E. Tomaseski, Clifford E. Cotton III, Alan R. Stockner, Colby Buckman
Life of this patent
Estimating the term…
Abstract
A nozzle insert that is capable of being irreversibly attached to a needle valve tube such that the resulting needle valve member can be used in a nested needle valve configuration for a dual mode fuel injector.
Claims20
A fuel injector nozzle insert comprising:
- a metallic body having a first end separated from a second end by a circumferential side surface, at least one nozzle outlet that opens through said first end, and at least one passage opening through said second end;
- a portion of said at least one passage being an annular valve seat on said metallic body;
- said circumferential side surface including an annular valve surface positioned between a first cylindrical surface and a second cylindrical surface.
A needle valve member for a fuel injector comprising:
- a nozzle insert having an external valve surface, an internal valve seat and at least one nozzle outlet;
- a tube irreversibly attached to said nozzle insert.
A method of making a needle valve member for a fuel injector, comprising the steps of:
- forming a nozzle insert to include an annular valve seat and an annular valve surface;
- machining at least one nozzle outlet through an end of said nozzle insert;
- and
- irreversibly attaching said nozzle insert to a tube.
1 more element
Dependencies are inferred from the claim text.