Thrust plate, method of manufacturing thereof, motor using the thrust plate, and the data storage disk drive using the motor
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United States of America Patent
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-
May 25, 2010
Issued Date -
N/A
app pub date -
Apr 2, 2007
filing date -
Apr 3, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A plate-like material is pressed and a middle concave portion centered on a center axis is formed in one axial surface of the material. Likely, an annular concave portion centered on a center axis and radially outwardly arranged is formed in one and/or the other axial surface of the material. The material is then cut along a radially outer rim of the middle concave portion, and between a radially outer rim and a radially inner rim of the annular concave portion. In this way, a thrust plate having indented portions at radially inside and outside portion of the one and/or the other axial surface thereof is manufactured. A burr formed in press working is accommodate within the indented portion and does not axially protrude from the one and/or the other axial surface of the thrust plate.
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