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:
May. 31, 2011
Filed:
Jun. 27, 2008
Jay Venkataraghavan, Dunlap, IL (US);
Michael Long, Metamora, IL (US);
Zhenlong Xu, Peoria, IL (US);
Stephen Lewis, Chillicothe, IL (US);
Jay Venkataraghavan, Dunlap, IL (US);
Michael Long, Metamora, IL (US);
Zhenlong Xu, Peoria, IL (US);
Stephen Lewis, Chillicothe, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A fuel injector includes a fuel injector body defining a fuel inlet and at least one fuel outlet, a valve having a first valve state and a second valve state and an actuator for the valve. The fuel injector includes a biasing spring including a cylindrical rolled sheet having a first spring end, a second spring end and defining a longitudinal center axis. The cylindrical rolled sheet is configured to change in length to bias the actuator toward the first actuator position and includes a helical seam located between the first spring end and a second spring end which has a shape adapted to reduce non-uniformity in a spring constant via distributing stiffness about the longitudinal center axis.