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Title: Piston pin bore and method of finishing

Abstract: A piston comprises a piston pin bore adapted to at least partially contain a piston pin. The bore is finished by a roll burnishing process which substantially simultaneously prestresses, smooths and distorts the bore into a predetermined hourglass configuration.


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Inventors: Fielder, David F. (Richmond, IN, US)

Application Number: 914639
Filing Date: 1978-06-12
Publication_date: 1980-02-26
Assignee: Dana Corporation (Toledo, OH)
Primary Class(es): 72/370.01 29/888.05
Other Classes:
US Patent Ref:
3357318Dec, 1967Packard et al.123/193.

Other Refs:
Primary Examiner: Larson, Lowell A.
Assistant Examiner:
Attorney: Leonardi; Robert M.