The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 09, 1991
Filed:
Nov. 17, 1989
Applicant:
Inventor:
Harold G Weber, Columbus, IN (US);
Assignee:
Cummins Engine Company, Inc., Columbus, IN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02M / ; B23H / ;
U.S. Cl.
CPC ...
23953312 ; 2395332 ; 219 6917 ;
Abstract
A method of forming curvilinear injector spray holes to produce an improved spray from the nozzle tip of a fuel injector is provided. The method uses electrical discharge machining in combination with a novel electrode to form a plurality of curvilinear spray holes in the injector nozzle tip which direct the fuel spray from the nozzle to produce an efficient, enhanced spray. The novel EDM electrode is preferably formed in the configuration of a constant pitch helix having a radius substantially equal to the radius of curvature of the curvilinear spray hole.