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:
Jul. 24, 2007
Filed:
Jul. 21, 2003
Martin A. Clements, North Royalton, OH (US);
Robert Nyzen, Chardon, OH (US);
Martin A. Clements, North Royalton, OH (US);
Robert Nyzen, Chardon, OH (US);
Argo-Tech Corporation, Cleveland, OH (US);
Abstract
A bearing assembly is provided for a fuel delivery system that includes a pump () having a housing that rotatably receives a rotor () carrying vanes () thereon, a cam ring () received between the housing and rotor (), and a support member of yoke () encompassing the cam ring () to selectively vary fuel flow. The bearing assembly () is a journal bearing between the yoke () and the cam ring () and includes an annular surface having a central opening therethrough. The annular surface includes a first, high pressure pad () and a second, low pressure pad () substantially diametrically opposite the first pad and separated by first and second lands (). The circumferential extent of the first pad () is at least as great as an inner diameter of the cam ring (). Circumferential ends of the second pad () are wider than circumferential ends of the first pad. The first and second pads () are formed by circumferentially extending grooves that extend an entire width of the bearing so that the cam ring moves between the first and second pads, and thereby varies a clearance between the lands () and the cam ring ().