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:
Sep. 05, 2000
Filed:
Jun. 25, 1998
Jerry A Wear, East Peoria, IL (US);
Lianghe Zuo, Chicago, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A fuel injector nozzle assembly includes a nozzle body that defines a nozzle outlet. A needle valve member is positioned in the nozzle body and moveable between a first position in which the nozzle outlet is blocked and a second position in which the nozzle outlet is open. At least one of the nozzle body and the needle valve member define a first chamber fluidly connected to a second chamber by at least one dual flow rate orifice. The needle valve member displaces fluid from the first chamber into the second chamber through the at least one dual flow rate orifice when moving from its first position to its second position. The dual flow rate orifice is sized and shaped to produce a flow restriction and to slow the movement of the needle valve member when moving from its closed position to its open position, but permit relatively unrestricted displacement flow in the opposite direction.