Method of and apparatus for manufacturing shaft
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United States of America Patent
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Nov 8, 2011
Grant Date -
Aug 28, 2008
app pub date -
Feb 14, 2008
filing date -
Feb 22, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A shaft manufacturing apparatus includes a first drawing die having a cylindrical first cavity defined therein which is open at both ends thereof and a second drawing die having a cylindrical second cavity defined therein which is open at one end thereof. The angle formed between a first tapered part of the first drawing die and the axis of the first cavity is greater than the angle formed between a second tapered part of the second drawing die and the axis of the second cavity.
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