Bearings – Rotary bearing – Antifriction bearing
Reexamination Certificate
2004-03-09
2010-06-29
Joyce, William C (Department: 3682)
Bearings
Rotary bearing
Antifriction bearing
C384S912000, C148S906000
Reexamination Certificate
active
07744283
ABSTRACT:
A bearing for alternators and a bearing for pulleys for reducing hydrogen embrittlement or cracking is used when the bearing is in an environment having a severe condition, such as, when hydrogen is generated from grease or the like. The bearing includes a rolling element, an inner ring and an outer ring, and at least one of the rolling element, where the inner and outer rings have a nitrogen enriched layer containing austenite crystal grains having a grain size number exceeding 10.
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Goto Tomoaki
Ohki Chikara
Joyce William C
McDermott Will & Emery LLP
NTN Corporation
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