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:
Dec. 16, 1997
Filed:
Jun. 21, 1996
Michael D Anderson, Metamora, IL (US);
Dennis H Gibson, Chillicothe, IL (US);
Gregory W Hefler, Chillicothe, IL (US);
Dale C Maley, Watkinsville, GA (US);
Ronald D Shinogle, Peoria, IL (US);
Mark F Sommars, Sparland, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A hydraulically actuated fuel injector includes an injector body having a needle control chamber, a nozzle chamber, and a nozzle outlet that opens to the nozzle chamber. Fuel within the injector is hydraulically pressurized during each injection cycle. A needle valve is positioned to reciprocate in the nozzle chamber between an open position in which the nozzle outlet is open and a closed position in which the nozzle outlet is closed. The needle valve includes a closing hydraulic surface exposed to pressure in the needle control chamber. A needle control valve is mounted within the injector body and is moveable between an off position in which the needle control chamber is opened to a source of high pressure fluid and an on position in which the needle control chamber is opened to a low pressure passage.