Allegheny Ludlum Corporation

Lawrence A Bollinger

Robert M Suchevich

Mark A Tarhay

A shield cup protector apparatus for protecting a ceramic shield cup of a plasma arc torch from breakage during operation thereof. The shield cup protector apparatus is comprised of an elongated cylinder having first and second open ends. A first open end of the elongated cylinder is positioned to abut a peripheral portion of the shield cup, allowing the shield cup to extend into an inner cavity formed by the cylinder, thereby allowing the shield cup to support the cylinder therefrom, while also allowing the elongated cylinder to surround the exposed surfaces of the shield cup to protect the shield cup thereby.

Shield cup protector apparatus for plasma arc torch

A plasma arc hole cutting device is disclosed for removing selected portions of metal workpieces, such as stainless steel, for testing or marking purposes. A plasma torch is connected at one end to a rotatable cam element and spaced a distance from the center of the cam element such that rotation of the cam element by a drive motor causes the plasma torch to rotate in an orbit about a longitudinal axis defined by the cam element. Suitably supported, the plasma torch burns a circular hole through the workpiece, thereby creating a slug which may be removed and analyzed, leaving a circular hole in the workpiece.

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Gibsonia, PA, United States of America

Lawrence A Bollinger