Method of manufacturing a ring-shaped member
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United States of America Patent
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Dec 14, 2010
Grant Date -
Oct 15, 2009
app pub date -
Oct 13, 2005
filing date -
Oct 13, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
is pressed and widened by cooperative operation of a finishing inner die of the shaping device and a window part of a perfect circle functioning as an outer die to manufacture a ring-shaped member. Therefore, a yield rate or a percentage of the weight of the ring-shaped member with respect to the weight of the raw material and the yield rate or the percentage of the ring-shaped member with respect to the blank can be improved, and the cost can be reduced.
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