Electric heating – Metal heating – By arc
Reexamination Certificate
2011-04-19
2011-04-19
Paschall, Mark H (Department: 3742)
Electric heating
Metal heating
By arc
C219S076160, C219S121510, C219S121480, C219S121520, C219S075000, C313S231310
Reexamination Certificate
active
07928338
ABSTRACT:
A device and a method for plasma spraying are disclosed. The device comprises, a cathode, an anode, a plasma channel formed by the anode and intermediate electrodes, and one or more flowable material injectors. The plasma channel has a throttling portion that divides the plasma channel into a high pressure portion near the cathode formed by at least one intermediate electrode and a low pressure portion near the anode. During operation, a plasma generating gas is heated by the arc maintained between the cathode and the anode, forming plasma. When the plasma passes through the throttling portion, its speed increases to a supersonic speed, and at the same time its static pressure drops. Flowable materials are injected in the plasma flow in the low pressure portion. The particles in the flowable materials are heated by the plasma and the resultant heated particles and plasma are output from the outlet of the plasma channel.
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Jones Day
Paschall Mark H
Plasma Surgical Investments Ltd.
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