Center pipe for plasma torch, electrode, and plasma torch
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United States of America Patent
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May 25, 2021
Grant Date -
May 30, 2019
app pub date -
Feb 1, 2019
filing date -
Jan 30, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A center pipe is used in a plasma torch including a base portion and an electrode to supply cooling water into the electrode. The center pipe includes a pipe body and a contact piece. The pipe body has a tube-like shape with a cooling water channel therein. The pipe body is electrically conductive and configured to be electrically connected to an external power source via the base portion. The contact piece is arranged radially outside the pipe body at an intermediate position between a base end surface and a tip end surface of the pipe body. The contact piece is electrically conductive and energizes the electrode through contact with an internal circumferential surface of the electrode. The base end surface is disposed outside the electrode when the center pipe is inserted into the electrode. The pipe body is configured to be electrically connected to the electrode via the contact piece.
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