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. 10, 2007
Filed:
Dec. 10, 1999
Mark G. Luehrmann, Hope, IN (US);
Mary E. Rupp, Greensburg, IN (US);
Mark D. O'leary, Seymour, IN (US);
Ilya L. Piraner, Columbus, IN (US);
John M. Miller, Columbus, IN (US);
William D. Mcnulty, Scipio, IN (US);
Cheryl Klepser, Hope, IN (US);
Mark G. Luehrmann, Hope, IN (US);
Mary E. Rupp, Greensburg, IN (US);
Mark D. O'Leary, Seymour, IN (US);
Ilya L. Piraner, Columbus, IN (US);
John M. Miller, Columbus, IN (US);
William D. McNulty, Scipio, IN (US);
Cheryl Klepser, Hope, IN (US);
Cummins Engine Company, Inc., Columbus, IN (US);
Abstract
An engine cylinder piston connecting rod subassembly, for use in an engine, includes a piston (), a piston pin () and a connecting rod (). The connecting rod has a piston end portion with a piston pin bore (). The piston pin is inserted through the piston pin bore and oppositely disposed portions of the piston, for securing the piston and the connecting rod together. Opposite ends of the piston pin bore are machined or profiled with relief portions (), to allow for piston pin deflection and thereby maximize the load carrying capacity, by providing a greater area of contact. The relief portions can be a curved surface () machined as part of the bore, or a plurality of end-to-end angled frustoconical surfaces (). The relief portions are shaped to correspond to the shape of the corresponding piston pin when under load during normal engine operation.