HVOF torch with fuel surrounding oxidizer
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United States of America Patent
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Sep 9, 2014
Grant Date -
Jan 9, 2014
app pub date -
Oct 16, 2012
filing date -
Jul 5, 2012
priority date (Note) -
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Abstract
HVOF torches introduce fuel and oxidizer reactants into a central passage so as to form a concentric stream having an axial stream of oxidizer surrounded by an annular stream of fuel that is positioned against a sidewall that bounds the central passage. The fuel can be introduced so as to swirl about the axial stream of oxidizer. The torch can be formed by a body having the central passage therethrough and an insert residing in the central passage and having an oxidizer passage therethrough. A portion of the insert can have a reduced cross section so as to form an annular fuel chamber, from which the flow of fuel into a passage first section is restricted so as to distribute the fuel against the sidewall. The torch can be provided with a cooling jacket to prevent damage to the body.
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