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:
Feb. 26, 2013
Filed:
Dec. 01, 2009
Marion B. Grant, Princeville, IL (US);
Petr Michlik, East Peoria, IL (US);
Marion B. Grant, Princeville, IL (US);
Petr Michlik, East Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A production robust autofrettage process for strengthening fuel injector nozzle tips includes applying a vacuum to the interior volume of the nozzle tip. Plugs are suctioned over each of the nozzle outlets. Nozzle outlets are blocked by pressing the plugs between the nozzle tip and a fixture component. The nozzle tip is then autofrettaged at least in part by pressurizing the interior volume with an autofrettage liquid. The plugs are then removed from the nozzle outlets leaving the nozzle tip strengthened with compressive residual stress, especially in the sac region of the interior volume of the nozzle tip.