Plasma torch provided with a ceramic protective cap
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United States of America Patent
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Oct 28, 2003
Grant Date -
Sep 12, 2002
app pub date -
Dec 14, 2001
filing date -
Mar 6, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Protective cap for a plasma arc working torch, includes a cap body (7) having an opening (17) for the passage of plasma gas, the cap body (7) being made of at least one material of ceramic type. The ceramic is a silicon nitride or an aluminum silicate. Preferably, the ceramic cap body (7) is clad with boron nitride deposited on the external surface of the cap body, the thickness of the cladding of boron nitride being less than 3 mm. Torch provided with such a cap and its use in a steel plate plasma cutting operation.
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