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:
Apr. 11, 2006
Filed:
Feb. 03, 2004
Roberto B. Nigro, Ann Arbor, MI (US);
Randall R. Gaiser, Chelsea, MI (US);
Eduardo Matsuo, Ann Arbor, MI (US);
Eric A. Highum, Howell, MI (US);
Roberto B. Nigro, Ann Arbor, MI (US);
Randall R. Gaiser, Chelsea, MI (US);
Eduardo Matsuo, Ann Arbor, MI (US);
Eric A. Highum, Howell, MI (US);
Federal-Mogul World Wide, Inc., Southfield, MI (US);
Abstract
A wrist pin for a heavy-duty piston assembly has a body with an axis of rotation and a generally cylindrical outer surface. The outer surface is adapted for pivotal connection to both a pair of laterally spaced pin bores and a small end of a connecting rod generally between the pin bores. The outer surface has a surface roughness equal to or less than 0.10 μm. The outer surface has a Kurtosis value that is inversely proportional with the surface roughness such that a product of the Kurtosis value and the surface roughness is between about 0.30 μm to 0.60 μm. The outer surface has a skewness of about −1.0 to 0.0 and a lay angle relative to the axis of about 85 to 95 degrees.