Title: Method for grinding piston rings

Abstract: A method and apparatus for grinding a split piston ring having at least one inwardly converging top or bottom wall member by bringing such wall into engagement with a rotating grinding member having a spherical segment working surface, the path of such relative movement being along a line which is coincident with the axis of the piston ring and also coincident with a radius of the spherical surface of the grinding member, whereby all of the inwardly converging surface of the split piston ring is concurrently ground to conform to the curvature of the spherical segment surface of the grinding member.

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Inventors: Sharpe, Robert L. (Richmond, IN, US)

Application Number: 947203
Filing Date: 1978-09-29
Publication_date: 1980-06-24
Assignee: Dana Corporation (Toledo, OH)
Primary Class(es): 451/51
Other Classes:
US Patent Ref:

1783047	Nov, 1930	Marshall	51/290.
2474358	Jun, 1949	Howlett	51/125.
2663127	Dec, 1953	Hunt	51/105.
3073689	Jan, 1963	Kupfert	51/324.
3377750	Apr, 1968	Day	51/216.
3918211	Nov, 1975	Packard	51/290.
3971165	Jul, 1976	Packard	51/290.

Other Refs: 501286

Feb, 1939	GB

Primary Examiner: Smith, Gary L.
Assistant Examiner:
Attorney: Schaich; W. A.