Metal working – Method of mechanical manufacture – Process for making bearing or component thereof
Reexamination Certificate
2004-08-06
2009-08-11
Bryant, David P (Department: 3726)
Metal working
Method of mechanical manufacture
Process for making bearing or component thereof
C029S898065, C029S898064, C384S572000, C384S574000
Reexamination Certificate
active
07571543
ABSTRACT:
A method of manufacturing a retainer for a roller bearing made of a metal plate and has a tubular main portion, pockets formed in the main portion intermittently concerning a circumferential direction and capable of retaining rollers rollably, and an outwardly oriented flange-like collar portion. An annular intermediate material is formed by die cutting the metal plate, and after a second intermediate material is formed by forming through holes in the intermediate material intermittently, a portion of the second intermediate material excluding a radially outer end portion is plastically deformed into a tubular shape. The portion plastically deformed tubular shape is formed as the main portion, a portion corresponding to the radially outer end portion of the second intermediate material is formed as the collar portion or a collar portion element for forming the collar portion, and portions corresponding to the through holes are formed as the pockets.
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Horino Keiichi
Ide Yoshiro
Kobayashi Kazuto
Nakamura Toshio
Afzali Sarang
Bryant David P
NSK Ltd.
Sughrue & Mion, PLLC
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