METHOD OF MANUFACTURING CASE FOR STARTING DEVICE, AND CASE FOR STARTING DEVICE
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United States of America
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Issued Date -
Mar 19, 2020
app pub date -
Mar 30, 2018
filing date -
Mar 30, 2018
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Abstract
A method of manufacturing a case for a starting device, the case having at least one curved portion and having an interior configured to be supplied with oil includes forming a thickened portion by partially thickening a metal sheet material and forming the curved portion by bending the sheet material at the thickened portion by press working. An outer surface of the curved portion projects outward of the case beyond a curved surface that is concentric with an inner surface of the curved portion and that has a radius of curvature equal to the sum of the radius of curvature of the inner surface and the thickness of the sheet material forming the case. Metal flows in the curved portion are continuous from the inner surface to the outer surface without any break.
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