Patent ID: 7749427
Filing Date: 2010-07-06
Classification: B23K

Abstract:
1. A consumable thermal torch for cutting through materials, comprising: a first elongated generally cylindrical member adapted to receive an associated supply of oxygen into a first end and react with the oxygen at a second end; a second member having a hollow profile similarly adapted to receive an associated supply of oxygen into a first end and react with the oxygen at a second end, said second member received radially within said first member and being substantially axially coextensive therewith; at least one first gas flow passage formed radially between said second member and said first member; and at least one second gas flow passage formed within said closed hollow profile of the second member and extending from said first end of said second member to said second end of said second member said second member is an elongated open-ended hollow thin-walled member having at least two circumferentially spaced radial lobes, each of said radial lobes having a circumferentially enlarged portion in contact with said first member and a pair of radially extending portions extending radially inward from respective ends of said circumferentially enlarged portion and converging toward one another, said at least one first gas passage formed as a plurality of outer lobe gas flow passages defined between said lobes and said first member; a third elongated generally cylindrical member adapted to receive an associated supply of oxygen into a first end and react with the oxygen at a second end, said third member received radially within said second member and being substantially axially coextensive therewith, said at least one second gas flow passage formed as an axially extending passage through said third member and extending from said first end of said third member to said second end of said third member, said radially extending portions of each of said lobes contacting said third member to form a closed lobe gas flow passage extending axially along each lobe.