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The eBearing News
October 25, 2005
NTN Files Patent Complaint Against Iljin
copyright © 2006 eBearing Inc.
NTN Corp. (USA, a division of NTN Corp., Japan) has filed a section 337 complaint with the U.S.
International Trade Commission against Iljin USA, a division of Iljin Bearing Ltd. (Korea).
The complaint alleges Iljin USA is importing and selling bearings made by Iljin Korea which
infringe claim 1 of NTN's U.S. patent 5,620,263, covering,
"Axle Bearing Assemblies, Components Thereof, and Products Containing Same."
The axle bearings involved are double-row angular contact ball bearings with an integral outer flange.
Under Section 337 of the Tariff Act of 1930, NTN is requesting that the ITC cut off Iljin's
import and sale of the offending bearings.
The ITC docket is here:
337-TA-554
NTN's patent is here:
5,620,263 - Axle Bearing Assembly and Method of Measuring Bearing Clearances
The patent was filed in 1995 and granted in July 1997.
Claim 1 that NTN asserts Iljin infringes is as follows:
1. An axle bearing assembly comprising an outer ring having a flange formed on the outer periphery
thereof and two rows of raceway surfaces formed on the inner periphery thereof, an inner ring having a
raceway surface formed on the outer periphery thereof in opposed relation to one of the raceway surfaces
of the outer ring, an axle formed on the outer periphery thereof with a raceway surface opposed to the
other raceway surface of the outer ring and also with a press-fit portion continuous therewith through
a shoulder portion and adapted to have the inner ring press-fitted thereon, and two rows of balls angularly
contacting with one row of the raceway surfaces of the outer ring and the raceway surface of the inner
ring and with the other row of the raceway surfaces of the outer ring and the raceway surface of the
axle, wherein the inner ring is press-fitted until it abuts against the shoulder portion of the axle
and in that bearing clearance is negative.
The matter may not be resolved for some time, however, even if the ITC accepts NTN's complaint and initiates
an investigation. Such investigations can easily take a year or more.
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- by Bruce A. Carr
from individual research,
tips and commercial sources.
Bruce Carr edited this content.
Copyrighted material; unauthorized reproduction prohibited.
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eBearing.com ... for everything that moves™
Entire contents Copyright © 1999-2011, eBearing Inc. All rights reserved.
eBearing.com and "... for everything that moves" are registered trademarks of eBearing Inc.
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