Electric heating – Metal heating – By arc
Reexamination Certificate
2006-10-24
2006-10-24
Paschall, Mark (Department: 3742)
Electric heating
Metal heating
By arc
C219S121510
Reexamination Certificate
active
07126080
ABSTRACT:
A gas distributor for use in a plasma arc torch is provided that has at least one plasma gas passageway formed conjointly with a metering passageway, and at least one helical gas passageway formed along an interior portion of the gas distributor, wherein the helical gas passageway is in fluid communication with the plasma gas passageway and the metering passageway. The combination of the metering passageway and the helical gas passageway provides for a metered flow rate and a controlled swirling flow of plasma gas within the plasma arc chamber, respectively, which functions to reduce the amount of molten emissive insert that is ejected from within an electrode at arc shut off, thereby resulting in an increased life of the consumable electrode.
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Conway Christopher J.
Horner-Richardson Kevin D.
Hussary Nakhleh A.
MacKenzie Darrin H.
Renault Thierry R.
Harness & Dickey & Pierce P.L.C.
Paschall Mark
Thermal Dynamics Corporation
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