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:
Jan. 27, 2004
Filed:
Oct. 22, 2002
Applicant:
Inventors:
Karl-Ludwig Grell, Aurachtal, DE;
Günter Grube, Aurachtal, DE;
Leo Müntnich, Aurachtal, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 3/364 ;
U.S. Cl.
CPC ...
F16C 3/364 ;
Abstract
A needle case or needle bush produced without cutting for a thin-walled needle bearing is produced without cutting from a cold-rolled strip, which is a heat-treated steel which has the disclosed chemical composition and the disclosed mechanical characteristic values. After a heat treatment, a surface hardness of 860 to 880 HV and a core hardness of 550 to 650 HV are achieved.