PISTON PIN AND METHOD FOR MANUFACTURING PISTON PIN
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United States of America Patent
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Mar 14, 2019
app pub date -
Jan 20, 2017
filing date -
Jan 20, 2017
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Abstract
Pin body has lightening hole having one-end-side and another-end-side large diameter parts formed on both end sides in the longitudinal direction; a central small diameter part; one-end-side and another-end-side first rounded parts each being provided between the large diameter part and the central small diameter part, having an inner diameter decreasing from each large diameter part side toward the central small part side, and having a rate of change of the inner diameter increasing from each large diameter part side toward the central small diameter part side; and one-end-side and another-end-side second rounded parts each being provided between each first rounded part and the central small diameter part, having an inner diameter decreasing from each first rounded part toward the central small diameter part side, and having a rate of change of the inner diameter decreasing from each first rounded part toward the central small diameter part side.
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