SIDE FRAME AND BOLSTER FOR A RAILWAY TRUCK AND METHOD FOR MANUFACTURING SAME
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United States of America Patent
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Issued Date -
Nov 22, 2012
app pub date -
May 17, 2011
filing date -
May 17, 2011
priority date (Note) -
Abandoned
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Abstract
A method of manufacturing a bolster of a rail car that includes a pair of shoe pockets at respective ends configured to be inserted into bolster openings of respective side frames includes providing a bolster pattern for forming a drag portion and cope portion of a mold. Cores that define an interior region of a cast bolster are also provided. The bolster pattern and the cores are configured to constrain shoe pocket angles within about ±0.5°.
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