Method of manufacturing a ball member usable in ball valves and other flow control devices
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United States of America Patent
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Jan 22, 2019
Grant Date -
Jun 4, 2015
app pub date -
Feb 10, 2015
filing date -
Feb 21, 2013
priority date (Note) -
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Abstract
Disclosures include a method for manufacturing a ball member usable in a flow control valve. The method comprises connecting a workpiece to a rotating apparatus along an axis of rotation of the workpiece, simultaneously rotating the workpiece about the axis of rotation and moving a rotating cutting tool toward the axis of rotation along a second axis to form a first curved surface having a progressively shorter radius with respect to the axis of rotation, wherein the second axis is generally oriented perpendicular to the axis of rotation, and cutting a bore through the workpiece, wherein one end of the bore extends through the first surface and the other end of the bore extends through the second surface.
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