Plural Supply Means For Solid Spray Materials Patents (Class 239/80)
  • Patent number: 11428408
    Abstract: A premix burner for combusting premixed gas containing fuel and air mixed in advance includes a plurality of combustion nozzles including a first nozzle having an ignition rod disposed therein and a second nozzle other than the first nozzle, a first premixed gas passage for supplying the premixed gas to the first nozzle, and a second premixed gas passage for supplying the premixed gas to the second nozzle. The first premixed gas passage and the second premixed gas passage are fluidically isolated from each other.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: August 30, 2022
    Inventor: Takanori Nagai
  • Patent number: 11293086
    Abstract: A connecting device is configured to connect a spray gun and a spray device. The connecting device includes a balance adjusting assembly, a rotation radius adjusting assembly, a driving assembly and a docking assembly. The balance adjusting assembly includes a fixing plate and a slide block configured to slide in a dovetail groove of the fixing plate. The rotation radius adjusting assembly includes a slide seat slidably connected with the balance adjusting assembly. The driving assembly includes a screw assembly configured to drive the slide block and the slide seat to move synchronously toward or away from each other. The docking assembly is detachably connected with the rotation radius adjusting assembly and connected to the spray gun.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: April 5, 2022
    Inventors: Guozheng Ma, Haidou Wang, Pengfei He, Shuying Chen, Ming Liu, Haijun Wang, Ling Tang, Shuyu Ding, Yiwen Wang, Hengheng Xi
  • Patent number: 9168547
    Abstract: A thermal metal spraying apparatus for use with a thermal metal spraying torch for applying a metal coating to a workpiece through a torch spraying nozzle having a spraying orifice. The thermal metal spraying apparatus provides a substantially tubular shroud having a first end and a second end adaptable to concentrically receive the torch spraying nozzle. The shroud has an opening at the second end, wherein the opening is selectably alignable with the spraying orifice. A drive mechanism is connected to the shroud and is operable to translate the shroud between a first position, wherein the opening at the second end is not aligned with the spraying orifice, thereby preventing the spraying of the metal coating on the workpiece, and a second position, wherein the opening at the second end is aligned with the spraying orifice permitting the spraying of the metal coating toward the workpiece.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: October 27, 2015
    Assignee: Comau, Inc.
    Inventors: Theodore Robert Brown, John Graham
  • Patent number: 8621705
    Abstract: A spraying windshield wiper assembly is provided for delivering cleaning fluid to a windshield surface from a wiper arm holding a wiper blade. The assembly includes a wiper arm having a first end and a second end. The first end is configured for coupling to a vehicle. An elongated blade housing is coupled to the second end of the wiper arm. A channel extends through the blade housing. A supply tube is coupled to the wiper arm and fluidly coupled to the channel for delivering a fluid to the channel. A plurality of nozzles is coupled to the wiper arm. Each nozzle is fluidly coupled to the channel whereby each nozzle is configured for dispensing the fluid from the channel onto the windshield of the vehicle. A wiper blade is coupled to the blade housing.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: January 7, 2014
    Inventor: Nelu Valeanu
  • Patent number: 7892609
    Abstract: The invention relates to a thermal spraying apparatus (1) for coating a surface (2) of a substrate (3) by means of a coating material (4). The thermal spraying apparatus (1) includes a spray pistol (5) with a heating device for heating the coating material (4) in a heating zone (6) and also a charging apparatus (7) with a feed (8) through which the coating material (4) can be introduced into the heating zone (6). In this arrangement the thermal spraying apparatus is so designed that a relative position (9) between the feed (8) and the heating zone (6) can be changed in the operating state.
    Type: Grant
    Filed: October 18, 2005
    Date of Patent: February 22, 2011
    Assignee: Sulzer Metco AG
    Inventor: Markus Mueller
  • Patent number: 7631816
    Abstract: The cold spraying process according to the invention uses cold gas streams whose properties (temperature (T), particle density (?), pressure (p), particle velocity (v)) are variably changed such that they can be adapted to the desired properties of the coatings.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: December 15, 2009
    Assignee: Siemens Aktiengesellschaft
    Inventors: Rene Jabado, Jens Dahl Jensen, Ursus Krüger, Daniel Körtvelyessy, Volkmar Lüthen, Ralph Reiche, Michael Rindler, Raymond Ullrich
  • Patent number: 7210638
    Abstract: An electric arc spraying system includes a spraying gun for thermally spraying an inner surface of an object such as a cylinder block by blasting compressed gas substantially perpendicularly to the supplying direction of target wires. The spraying gun is rotated by a spraying gun rotation mechanism. The target wires are loaded in and supplied from wire supplying sources. A wire feeder rotation mechanism is provided for rotating the wire supplying sources synchronously with the spraying gun in rotation. Wire feeders are provided at the spraying gun or adjacent to the wire supplying sources for feeding the target wires. Wire support cables are configured to guide the target wires from the wire supplying sources to the spraying gun.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: May 1, 2007
    Assignees: Daihen Corporation, Toyota Jidosha Kabushiki Kaisha
    Inventors: Gen Tujii, Yousuke Nakamura, Masanobu Uchida, Kota Kodama, Nobuhide Kondo, Noritaka Miyamoto
  • Patent number: 6742719
    Abstract: An electric arc metalizing apparatus includes a wire drive unit within a housing unit, a device for attaching at least two spools of wire within the housing unit such that the wire can be led through the wire drive unit, a spray gun spatially moveable with respect to the housing, the wire drive unit having at least one drive roller advancing the wire to the spray gun, the drive roller having a knurled surface engaging the wire for avoiding slippage and removing contaminations like corrosion layers, and within the housing unit at least one wire cleaning/lubrication mean position downstream from said drive unit.
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: June 1, 2004
    Assignee: International Metalizing & Coatings, Inc.
    Inventors: Carl Frazer Tudor, Philip Mike Midgett
  • Patent number: 6669106
    Abstract: A feedstock injector for connection to a source of heated gas comprises a converging channel extending from the upstream end to the downstream end of the injector. A splitting arm extends diagonally within the converging channel, the splitting arm comprising two symmetrically opposed surfaces extending from the inlet to the outlet ends of the converging channel. A feedstock injection passage opens axially at the downstream end of the splitting arm. The gas stream discharged by the injector contacts and entrains the feedstock with improved uniformity.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: December 30, 2003
    Assignee: Duran Technologies, Inc.
    Inventor: Lucian Bogdan Delcea
  • Patent number: 6517010
    Abstract: The system for injecting gas for a detonation projection gun does not incorporate mechanical closing valves or systems for the supply of combustible gas or other inert additive compounds such as nitrogen, argol, helium or the like. On the contrary, the supply of gas or compounds occurs directly and separately to the detonation chamber (1) through a series of independent passages, one for the comburant and at least another passage for the combustibles, each passage being comprised of an expansion chamber (8) and of a plurality of distribution conduits (9) having a reduced cross-section and/or extended length.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: February 11, 2003
    Assignee: Aerostar Coating, S.L.
    Inventors: Georgy Yur'evich Barykin, Inaki Fagoaga Altuna
  • Patent number: 6513728
    Abstract: A thermal spray or welding apparatus including a cored wire electrode with a sheath and a multiplex powder composite. The composite comprises micron-sized particles and sub-micron sized particles, including nano-scale particles, the particles mechanically cooperating to promote smooth powder flow, which facilitates compaction of the cored wire electrode. The invention also includes a method of manufacture of the apparatus including the cored wire electrode and its method of use to deposit a low porosity coating with high levels of alloyed refractory elements that is adherent and low in oxide content.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: February 4, 2003
    Assignee: Concept Alloys, L.L.C.
    Inventors: Joseph Paul Hughes, David John Urevich
  • Patent number: 6478234
    Abstract: A powder injector assembly for delivering powder into an axial flow of heated gas of a powder coating applicator. The assembly includes a powder injector rotatable in a plane whose centerline is perpendicular to the gas flow for issuing powder thereto. An injection nozzle exit port is integral with and leads from the injector and is disposed in the centerline for angular rotation thereabout, and is alignable into the gas flow for powder melting and subsequent substrate deposition. An integral cooling system maintains the powder in a non-melted state until its exit. The injector is independently movable laterally, axially, and angularly for respective radial, axial, and angular movement of the injection nozzle exit port. Angular movement occurs along a centerline passing through the tip of the nozzle exit port to thereby permit independent angle adjustment without changing axial or lateral locations of the injection point.
    Type: Grant
    Filed: June 18, 2001
    Date of Patent: November 12, 2002
    Assignee: Northrop Grumman Corporation
    Inventors: John F. Klein, Hans M. Siewertsen
  • Patent number: 6431464
    Abstract: A thermal spraying method involves the creation of a coating comprising titanium wire in the presence of nitrogen. The apparatus of the invention comprises a nozzle which has a cylindrical throat, with feedstock guides which guide the feedstock wires to a point of intersection in the throat. A current is passed through the wires to cause an arc in the throat, and a nitrogen rich gas under pressure is forced through the throat, generating a spray of molten particles which is used to coat a substrate. In a variation of the method, one of the feedstock wires comprises a binder metal, which produces a coating having enhanced toughness.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: August 13, 2002
    Assignee: Metalspray U.S.A., Inc.
    Inventor: Michael Walter Seitz
  • Publication number: 20010040188
    Abstract: A thermal spraying method involves the creation of a coating comprising titanium wire in the presence of nitrogen. The apparatus of the invention comprises a nozzle which has a cylindrical throat, with feedstock guides which guide the feedstock wires to a point of intersection in the throat. A current is passed through the wires to cause an arc in the throat, and a nitrogen rich gas under pressure is forced through the throat, generating a spray of molten particles which is used to coat a substrate. In a variation of the method, one of the feedstock wires comprises a binder metal, which produces a coating having enhanced toughness.
    Type: Application
    Filed: July 9, 2001
    Publication date: November 15, 2001
    Applicant: METALSPRAY U.S.A., INC.
    Inventor: Michael Walter Seitz
  • Patent number: 6168828
    Abstract: A gas feed system for detonation gun apparatus having a labyrinth shaped gas path. The labyrinth is positioned between the fuel and oxygen supply and the combustion chamber of a detonation gun. The labyrinth allows the fuel and oxygen supply to flow into the combustion and precludes and migration of the detonation wave front into the fuel supply by destroying that portion of the detonation wave front that enters the labyrinth. The labyrinth gas feed system increases safety, reliability and productivity of the detonation coating process.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: January 2, 2001
    Assignee: Aerostar Coating, S.L.
    Inventors: Alexandr Vladimirovich Chernyshov, Georgy Yur'evich Barykin
  • Patent number: 6035940
    Abstract: A fire fighting apparatus that is mounted to a window sill of the floor with a fire therein. The fire fighting apparatus comprises a substantially elongated conduit having an opening on its upper end, an anchor arm mounted from the opening on the conduit and a waterway securely fastened to the conduit. A fire hose is secured to the bottom of the waterway to supply water to the fire fighting apparatus. The anchor arm comprises a horizontal portion that fits on top of the window sill of the burning floor to securely suspend the fire fighting apparatus thereon. The anchor arm has a wedge-shaped claw that may be used to break open or to pry open a shut window.
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: March 14, 2000
    Inventor: Kevin Bourke
  • Patent number: 5985373
    Abstract: A method and apparatus for applying multi-layered coatings utilizing a detonation gun process. The present invention consists of multiple powder feeders (7, 8) attached to the barrel (13) of a detonation gun (2). The powder feeders (7, 8) are disposed at axially spaced locations along the barrel (13) and supply coating materials to the barrel (13) in advance of a detonation wave front (100) such that the powders are exhausted from the barrel (13) in serial fashion producing a multi-layered coating on the workpiece (1). The multi-layered coating system of the present invention substantially enhances the quality and productivity of the detonation coating process.
    Type: Grant
    Filed: October 16, 1998
    Date of Patent: November 16, 1999
    Assignee: Aerostar Coatings, S.L.
    Inventor: Alexandr Vladimirovich Chernyshov
  • Patent number: 5932293
    Abstract: A thermal spray system includes a combustion unit connected to at least one port for supplying a flow of a combustible fluid from an external source of fuel and oxidant. The combustion unit includes a permeable burner block constructed to receive said combustible fluid from and to generate a high-energy stream of gas. The thermal spray system also includes an exhaust nozzle constructed to direct the high-energy stream of gas toward a substrate, and a material delivery unit constructed to deliver a material into the high-energy stream of gas to form a highly energized stream of particles. When the thermal spray system is used for bead blasting, the provided material is an abrasive material. Alternatively, when the thermal spray system is used for coating a substrate, the provided material is a coating material. The material delivery unit may be an injector or an electric arc unit.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: August 3, 1999
    Assignee: Metalspray U.S.A., Inc.
    Inventors: Vladimir E. Belashchenko, Viacheslav E. Baranovski
  • Patent number: 5791560
    Abstract: An arc spray bead for uniformly distributing molten metal. The head includes a pair of contact tips, a primary nozzle and a plurality of side nozzles. Wire is fed through the contact tips into an arc zone where the wire tips are melted. The plurality of side nozzles are located adjacent to the contact tips downstream from the primary nozzle. The primary nozzle blows the molten metal into the stream of the side nozzles. The nozzles atomize, cool and uniformly distribute the molten metal into a desired spray pattern. During spraying the feed wires are moved forward. Initially upon discontinuing the spraying, the feed wires are retracted in part to prevent fusing of the wire leads.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: August 11, 1998
    Assignee: Thermion, Inc.
    Inventors: Alan R. Rogers, Richard W. Goessman, Frank S. Rogers
  • Patent number: 5692678
    Abstract: A flame spraying burner melts or partially melts with combustion heat, a spray material comprising a powdered fire-resisting material to thermally spray a damaged portion of a furnace wall or the like. The flame spraying burner includes a burner nozzle body having a central passage for supplying oxygen-contained gas, the central passage having a projecting leading end, and a plurality of fuel gas supply passages formed around the central passage. Each of the plurality of fuel gas supply passages has a leading end recessed from the leading end of the central passage. A cylindrical burner tile is positioned around the leading end of the fuel gas supply passages and extends to at least the leading end of the central passage. A plurality of oxygen jetting ports are formed in the radial direction around the leading end of the nozzle cap.
    Type: Grant
    Filed: May 1, 1995
    Date of Patent: December 2, 1997
    Assignee: Kawasaki Steel Corporation
    Inventors: Genichi Ishibashi, Kuniaki Sato, Hiroyuki Nakashima, Keiji Matsuda, Satoshi Shimizu, Seiji Watanabe
  • Patent number: 5614022
    Abstract: A method and apparatus for coating piston rings by producing droplets of molybdenum and stainless steel from these materials in wire form which are sprayed, preferably in equal amounts to coat the outer surfaces of the rings. A plurality of rings are mounted on a body which are moved in a helical path during the spraying. A nozzle is used having a central passage through which the wire is fed and two sets of passages, one set for an oxy-acetylene mixture and the other for compressed air, with the outlet orifices of the two sets of passages arranged in concentric rings around the central passage outlet orifice.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: March 25, 1997
    Assignee: COFAP-Companhia Fabricadora de Pecas
    Inventors: Jan Vatavuk, Jose R. Z. Neto, Marcos R. Piccili
  • Patent number: 5452854
    Abstract: The plasma spray apparatus for the coating of the inner walls of bores and tubes essentially comprises a housing, a supply member, a plasma gun shaft member and a plasma gun head member. The plasma torch created in the head member escapes transversely with regard to the central longitudinal axis of the plasma spray apparatus. The supply member is rotatably received in the interior of the housing and is driven by an electric motor and a gear box. The supply member comprises a swiveling coupling member by means of which the plasma gun shaft member is connected to the shaft member. Thus, the rotatable shaft member can be radially deflected with reference to the axis of rotation. Thus, the head member fixed to the free end of the shaft member can be radially adjusted. With such a plasma spray apparatus, bores and tubes having greatly varying inner diameters can be reliably coated.
    Type: Grant
    Filed: November 29, 1993
    Date of Patent: September 26, 1995
    Assignee: Plasma-Technik AG
    Inventor: Silvano Keller
  • Patent number: 5285967
    Abstract: A high velocity, oxygen fuel ("HVOF") thermal spray gun for spraying a melted powder composition of, for example, thermoplastic componds, thermoplastic/metallic composites, or thermoplastic/ceramic composites onto a substrate to form a coating thereon. The gun includes an HVOF flame generator for providing an HVOF gas stream to a fluid cooled nozzle. A portion of the gas stream is diverted for preheating the powder, with the preheated powder being injected into the main gas stream at a downstream location within the nozzle. Forced air and vacuum sources are provided in a shroud circumscribing the nozzle for cooling the melted powder in flight before deposition onto the substrate.
    Type: Grant
    Filed: December 28, 1992
    Date of Patent: February 15, 1994
    Assignee: The Weidman Company, Inc.
    Inventor: Larry G. Weidman
  • Patent number: 5120582
    Abstract: A compressed air with or without water droplets in mist form and additional pure oxygen is passed over the radially exterior hot surfaces of an expansion nozzle having a L/D ratio of at least 3-to-1 and preferably surrounded by thermal insulation to enhance regenerative heat exchange between the expansion nozzle and the compressed air stream, as well as regenerative heat exchange with the exterior of a combustion chamber wall of an internal burner, also surrounded by thermal insulation prior to the compressed air entering the combustion chamber for ignition with a mixture of fuel. This permits large operating economics to be realized, reducing the need for expensive pure oxygen as the oxidant and permits the elimination of forced cooling by confined water flow for such internal burners.
    Type: Grant
    Filed: January 16, 1991
    Date of Patent: June 9, 1992
    Inventor: James A. Browning
  • Patent number: 5082179
    Abstract: A flame spray directing means for connection to a flame spray nozzle of an autogenous flame-spraying apparatus for optimizing the working parameters of the apparatus including flame speed and kinetic energy is provided. The means comprises a hollow longitudinally extending module of tubular configuration through which flame spray material is caused to flow. The extending module has a predetermined length with one end portion thereof shaped for coupling to the flame spray nozzle and for providing a combustion chamber therefor, with its opposite end portion providing an exit end therefor. A portion of the hollow module extending from the combustion chamber to the exit end coaxially defines an extending accelerating chamber which is divided into a first stage chamber of specified diameter following the combustion chamber and a second stage chamber in which the diameter thereof less than that of the combustion chamber.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: January 21, 1992
    Assignee: Castolin S.A.
    Inventors: Wolfgang Simm, Hans-Theo Steine
  • Patent number: 5047265
    Abstract: A method is provided for flame-spraying powdered materials onto a substrate by means of an autogenous flame-spraying apparatus of the type in which a combustion gas-oxidation gas mixture is produced and ignited at the outlet of a burner nozzle with the powdered material conveyed by a carrier gas to the burner nozzle and introduced in the flame at the outlet of the burner nozzle. The working parameters of the flame-spraying apparatus are chosen so as to provide an energy constant P.sub.E which together with the kinetic energy E.sub.k of the particles enables the use of a broad range of flame speeds.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: September 10, 1991
    Assignee: Castolin S.A.
    Inventors: Wolfgang Simm, Hans-Theo Steine
  • Patent number: 4928879
    Abstract: A thermal spray gun, for spraying wire and powder simultaneously at high velocity to produce a dense and tenacious coating, comprises a nozzle and a gas cap extending from the nozzle. Combustible gas is injected from the nozzle coaxially into the combustion chamber in the gas cap. An annular outer flow of pressurized air is injected into the chamber adjacent to the gas cap. Heat fusible wire is fed axially from the nozzle into the combustion chamber. An annular inner flow of pressurized air is injected into the combustion chamber adjacent to the wire. Powder in a carrier gas is fed annularly from the nozzle into the combustion chamber coaxially between the combustible mixture and the inner flow, such that a spray stream containing the powder and the heat fusible material commingled in finely divided form is propelled through the open end.
    Type: Grant
    Filed: December 22, 1988
    Date of Patent: May 29, 1990
    Assignee: The Perkin-Elmer Corporation
    Inventor: Anthony J. Rotolico
  • Patent number: 4911955
    Abstract: When forming a refractory mass on a surface a mixture of oxidizable particles and refractory particles in a comburent carrier gas is sprayed against that surface from an outlet of a lance. Thus on combustion of the oxidizable particles, sufficient heat is generated to soften or melt at least the surfaces of the refractory particles to bring about the formation of the refractory mass. The mixture of particles is itself mixed with a carrier gas stream, for example, by using venturi, and is fed along a line towards a lance outlet. Oxygen is introduced into such feed line at at least one location along the feed line and is mixed with the carrier gas/particle mixture during its flow towards the lance outlet before reaching that outlet, and preferably at least 1 meter from the outlet of the lance.
    Type: Grant
    Filed: September 7, 1988
    Date of Patent: March 27, 1990
    Assignee: Glaverbel
    Inventors: Leon-Philippe Mottet, Emilian Wlodarski
  • Patent number: 4835022
    Abstract: The invention relates to a process for the coating of components, wherein a plastic-containing layer is sprayed onto the surface of the components. During spraying, at least one mixture component consisting of a material other than plastic is added directly to a plastic powder. The plastic powder and the mixture component are supplied separately and are separately adjustable.
    Type: Grant
    Filed: July 29, 1987
    Date of Patent: May 30, 1989
    Assignee: UTP SchweiBmaterial GmbH & Co. KG
    Inventor: Erwin D. Huhne
  • Patent number: 4805836
    Abstract: A device for the thermal spray application of welding materials comprises a jet focussing nozzle having an axis and defining an elongated, axially extending jet focussing channel having a feed-in end, and a burner nozzle in the pinch nozzle for directing a flame into the feed-in end. The jet focussing nozzle is divided into two connected parts along a plane extending transversely to the jet focussing nozzle axis in the area of the feed-in end and dividing the jet focussing nozzle into a front part and a rear part receiving the burner nozzle, and the front nozzle part is adjustable with respect to the rear part between an operating position wherein the nozzle parts have contacting end faces in this plane and the jet focussing channel extends continuously through the nozzle parts, and an ignition position wherein the front part clears the burner nozzle for access thereto.
    Type: Grant
    Filed: June 9, 1987
    Date of Patent: February 21, 1989
    Assignee: Castolin S.A.
    Inventors: Karl-Peter Streb, Uwe Szieslo, Manfred Oechsle
  • Patent number: 4674683
    Abstract: A plasma gun has a hollow generally cylindrical anode nozzle member and coaxially disposed therein a cylindrical cathode member, the members co-acting to form an interior passage for plasma forming gas. At one end, within the body of the gun, the passage comprises an annular gas inlet chamber or plenum proximate to the cathode. Progressing in the direction of flow, the passage is defined as an annular space between the cathode and anode members and then continues through the anode nozzle member to the exterior of the gun body. Plasma-forming gas is introduced inwardly through respective inlets, tangentially and radially into the gas inlet chamber. Means are provided for selectively regulating the respective amounts of gas introduced radially and tangentially to thereby determine the degree of vortical flow of gas through the gun.
    Type: Grant
    Filed: May 6, 1986
    Date of Patent: June 23, 1987
    Assignee: The Perkin-Elmer Corporation
    Inventor: Arthur J. Fabel
  • Patent number: 4582254
    Abstract: Plural powders are supplied to one or more torches from different fluidized-powder zones, and plural independent lines through each of these zones enable each torch to be supplied with one or more independent lines of powder flow to the nozzle-discharge region of each torch.
    Type: Grant
    Filed: June 6, 1984
    Date of Patent: April 15, 1986
    Assignee: Eutectic Corporation
    Inventors: Anthony J. Rotolico, Edward Spinella
  • Patent number: 4568019
    Abstract: The products of combustion of compressed air and fuel fed to an internal burner issue through one or more orifices into a single large diameter expansion or nozzle bore open to the atmosphere. Solid rod or solid particle material to be sprayed is passed concurrent with the products of combustion through the large diameter chamber with the material being heat softened or melted to form a spray which is impacted against a workpiece after acceleration to high velocity. The pressure within the large diameter chamber is maintained sub-atmospheric. By aspirating atmospheric air flow bearing particulate material or by leaking air about a solid rod to the sub-atmospheric chamber pressure, pre-melting of the wire or particulate material within the material feed passage upstream of the chamber and prevented via hot combustion product gas back flow.
    Type: Grant
    Filed: April 20, 1984
    Date of Patent: February 4, 1986
    Inventor: James A. Browning
  • Patent number: 4099481
    Abstract: The apparatus of the invention employs a gas torch which has the feature of selective addition of metal powder to the gas flow. In use, the torch is caused to make a continuous succession of traverses of a workpiece region for preheating purposes and then, without interrupting the continuous operation of either the torch or the traversing cycles, a controlled flow of metal powder is caused to enter the torch flow, enabling the bonding and progressive building of a metal coat to desired thickness. In the embodiments described, first and second different metal powders are thus successively coated to the substrate without interrupting the continuous operation. Different embodiments are described in the particular context of applying uniform circumferential coatings to a cylindrical workpiece such as a shaft.
    Type: Grant
    Filed: September 30, 1976
    Date of Patent: July 11, 1978
    Assignee: Eutectic Corporation
    Inventor: John E. Lyons