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| Number | Title | Issue Date |
| 4878953 | Method of refurbishing cast gas turbine engine components and refurbished component The refurbishing process permits an overlay to be formed on a casting to repair cracks, distortions and the like as well as to build up undersized sections. During refurbishing, a plasma arc is established under an electric current of less than 30 amps to... | 11/07/1989 |
| 4864094 | Process of fabricating a cutting edge on a tool and a cutting tool made thereby A cutting tool is provided with a fabricated cutting edge which is applied using a low heat plasma transferred arc and powdered metal. The heat affected zone between the applied edge and the substrate is maintained at a minimum with low dilution and penet... | 09/05/1989 |
| 4822248 | Rebuilt shrouded turbine blade and method of rebuilding the same The shrouded turbine blade is provided with a wear resistant surface on the seals as well as along the abutment faces including the notched edges. The wear surfaces are characterized in being metallurgically bonded to the base material of the shroud witho... | 04/18/1989 |
| 4808055 | Turbine blade with restored tip The worn tip of a turbine blade is restored by applying a metallurgically bonded wear resistant surface at the tip. The wear resistant surface is applied using a transferred plasma arc and powdered metal particles.... | 02/28/1989 |
| 4745256 | Narrow substrate having weld bead of powdered metal The welding method may be used to lay down weld beads on metallic substrates with a narrow width of 0.125 inch and less. The process employs a plasma transferred arc and pulses the current delivered to the arc such that a wave form having at least a main ... | 05/17/1988 |
| 4739146 | Method for applying a weld bead to a thin section of a substrate The welding method is used to lay down weld beads on metallic substrates with a thin section, e.g., of down to 0.030 inch. The process employs a plasma transferred arc which is generated at low current, e.g., between 0.5 amps and 60 amps, and with a very ... | 04/19/1988 |
| 4689463 | Welding apparatus method for depositing wear surfacing material and a substrate having a weld bead thereon The welding method may be used to lay down weld beads on metallic substrates with a narrow width of 0.125 inch and less. The process employs a plasma transferred arc and pulses the current delivered to the arc such that a wave form having at least a main ... | 08/25/1987 |
| 4661249 | Prefilter device for polymeric material The filter assembly is constructed of outer sleeves of wire screen, a mass of shattered metal particles within the sleeves and at least one tubular filter element within the shattered metal particles. The mass of shattered metal particles serves to remove... | 04/28/1987 |
| 4376793 | Process for forming a hardfacing surface including particulate refractory metal There is disclosed a process for forming a hardfacing surface including particulate refractory metal carbide by directing a plasma transferred arc against a wear surface of an element and passing a powder comprised of refractory metal carbide particles ad... | 03/15/1983 |
