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:
Nov. 04, 1997
Filed:
Oct. 22, 1996
Shikui K Chen, Peoria, IL (US);
Gregory W Hefler, Chillicothe, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A hydraulically-actuated fuel injector includes an injector body having a nozzle chamber, a nozzle outlet, an actuation fluid inlet, an actuation fluid drain, an actuation fluid cavity and a pressure relief passage extending between the actuation fluid cavity and the actuation fluid drain. A hydraulic means, including an actuation fluid control valve mounted within the injector body, is used for pressurizing fuel in the nozzle chamber. A needle valve member is mounted 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. A relief valve is mounted within the injector body and has a first position in which the pressure relief passage is closed and a second position in which the pressure relief passage is open.