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:
Oct. 27, 1998
Filed:
Nov. 17, 1995
Michael D Anderson, Metamora, IL (US);
Mark F Sommars, Sparland, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
An improved fuel injector system comprising a nozzle tip which defines a pressure control chamber, an injection chamber, and at least one fuel injection orifice. The nozzle tip further includes a movable direct-operated check operable to selectively control fluid communication between the injection chamber and the fuel injection orifice. The improvement includes a hilt reciprocally movable within the injection chamber and being of a construction to define a lower chamber and an upper chamber. The improvement further includes a high pressure fuel passage communicating high pressure fuel to the lower chamber. The present invention provides reduced stresses on the nozzle tip as the check engages the check seat while not adversely affecting the performance of the fuel injector. This results in lower tip wear and improved life of the fuel injector.