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:
Jun. 24, 2008
Filed:
May. 05, 2004
Applicant:
Pieter Martin Lugt, Vianen, NL;
Inventor:
Pieter Martin Lugt, Vianen, NL;
Assignee:
AB SKF, Gothenburg, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 19/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for treating the surface of a machine element, such as the raceway and/or a rolling element of a rolling element bearing, comprising the steps of—subjecting the surface to a hard turning operation so as to obtain a specific roughness profile having a series of alternating ridges and grooves, —after the hard turning operation subjecting the surface to a ball calendering operation so as to flatten the ridges of the roughness profile whereby a Δq value smaller than 5° is obtained.