US Patent: 3,862,391 - Method And Apparatus For Removing Material form a Workpiece


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US Patent: 3,862,391

Method And Apparatus For Removing Material form a Workpiece

Patentees:

Oscar C. Blomgren, Sr. (exact or similar names) - Lake Bluff, IL

Oscar C. Blomgren, Jr. (exact or similar names) - Lake Bluff, IL

USPTO Classifications:

219/68, 82/900, 83/171

Tool Categories:

Assignees:

Inter-Probe, Inc. - North Chicago, IL

Manufacturer:

Not known to have been produced

Witnesses:

none listed

Patent Dates:
Applied:	Dec. 20, 1973
Granted:	Jan. 21, 1975

Patent Pictures:

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Description:

Lockwood, Dewey, Zickert & Alex - patent attorneys

Abstract

Method and apparatus for removing material from an electrically conductive workpiece, including a material removal tool mounted adjacent to and in material removal relation with a rotatably supported and driven workpiece, a probe electrically insulated from the tool and workpiece having a tip end spaced adjacent to the workpiece and tool but closer to the workpiece than the tool, and a high-voltage D.C. source connected between the probe and the tool and producing a potential level sufficient to create an electrical arc between the tip end of the probe and the workpiece.