Coanda Patents (Class 239/DIG7)
  • Patent number: 6101957
    Abstract: An apparatus for the disposal of solid rocket motors which produce exhaust ases containing flammable and/or explosive products. The solid rocket motor to be burned is first detachably connected to and inserted in one end of an elongated mixing chamber which has, at an opposite end, a multi-step expansion nozzle. The rocket motor is then ignited and the exhaust gas is passed into the mixing chamber, which is sufficiently large to reduce the velocity of exhaust gases from supersonic to subsonic. Air is injected into the mixing chamber to react with flammable and/or explosive products in the exhaust gases and the resultant mixture is then discharged from the mixing chamber through a multi-step expansion nozzle to expand the gaseous mixture and, at the same time, produce substantial turbulence within the gas mixture which is about six times higher than the turbulence levels produced by a constant area circular nozzle.
    Type: Grant
    Filed: June 11, 1999
    Date of Patent: August 15, 2000
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kenneth J. Wilson, Eric D. Erickson, Klaus C. Schadow
  • Patent number: 6039269
    Abstract: A water nozzle for use in vapor mitigation produces a wide conical water pattern by way of an outlet that has a coanda effect surface across which the water flows.
    Type: Grant
    Filed: October 15, 1998
    Date of Patent: March 21, 2000
    Assignee: Premier Farnell Corp.
    Inventor: Thomas Mandzukic
  • Patent number: 5860598
    Abstract: This invention relates to a device for forming a mist or fog having a convex surface which receives and expands a fluid delivered thereto. The convex surface of the device has a number of circular protrusions spaced peripherally thereon, separated by a number of slots having holes therein. The holes communicate with an inner cylindrical chamber. Suction is produced through the holes when the fluid stream passes over them, to automatically add a further fluid to the fluid being expanded by the device. A cylindrical sleeve surrounds and protects the device. The device is supported in the cylindrical sleeve, either in front of a nozzle by an annular structure, or by a bent tube held in the cylindrical sleeve in front of the device, or in a venturi.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: January 19, 1999
    Inventor: Luis R Cruz
  • Patent number: 5727381
    Abstract: A duct fixed to a vehicle propelled through an ambient fluid medium is innally provided with spaced channel passages from which the fluid medium is ejected under pressure tangentially of local duct surfaces through Coanda affected slots at the trailing edge of the duct from which only the ejection of the fluid medium occurs. The supply of the pressurized fluid medium under selective control is limited to different angular segments of the channel passages in order to modify the flow stream through the duct so as to perform certain functions such as thrust control and steerage control effects enhancing vehicle maneuverability.
    Type: Grant
    Filed: February 19, 1997
    Date of Patent: March 17, 1998
    Assignee: The United States of America as represented by Secretary of the Navy
    Inventor: Ernest O. Rogers
  • Patent number: 5711481
    Abstract: The present invention's fog generating apparatus has a mixing chamber. A steam nozzle in the mixing chamber injects high pressure steam into the chamber. The injected steam entrains ambient air, pulling it through an air opening into the mixing chamber. The steam and air mix to form humid air. Cryogenic fluid, preferably liquid nitrogen, is injected through a nozzle, which is positioned in the path of the humid air. The cryogenic fluid rapidly cools the warm, humid air which generates large quantities of fog. Depending of the way the steam is injected and the design of the mixing chamber, the present invention can generate slow or fast moving fog.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: January 27, 1998
    Assignee: Spectra F/X, Inc.
    Inventors: Robert A. MacDonald, Aidan Bradley
  • Patent number: 5680993
    Abstract: An atomizing nozzle primarily designed for agricultural spraying has a narrow and controlled droplet size distribution and the ability to shape the spray into a solid cone or fan for evenly applying the spray to the crops. The nozzle is able to operate at low air delivery pressures, in the order of 10 to 30 in. of water column. A central air delivery bore communicates with an air manifold within a boom. Near the exit plane of the throat there is provided an inlet conduit connected to the liquid to be sprayed, the conduit being at right angles to the bore axis. An outlet nozzle from the conduit is positioned on the bore axis and has its exit plane upstream of the exit plane of the bore so that atomization of the liquid will take place within the central bore between the two exit planes. A pair of shaping nozzles are connected to secondary bores that in turn communicate with the manifold.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: October 28, 1997
    Assignee: National Research Council of Canada
    Inventors: Thomas W. McCracken, Kevin A. Jonasson, Adam J. Bennett
  • Patent number: 5658141
    Abstract: A device for spreading a flame, comprises at least one principal nozzle (35) delivering a jet of combustible gas or combustion supporting gas (6); at least one secondary nozzle (8) delivering a jet of combustion supporting gas or combustible gas (12) which flows next to the principal jet and which has a substantially constant thickness. At least one curved surface (9) is disposed tangentially to the jet of secondary gas so as to deflect it by the Coanda effect, to draw in the principal jet of gas (6) and to mix the gas of the secondary jet (12) and the gas of the principal jet (6) to form a flame.
    Type: Grant
    Filed: August 23, 1995
    Date of Patent: August 19, 1997
    Assignee: L'Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
    Inventors: Christian Larquet, Alain Villermet
  • Patent number: 5647215
    Abstract: A combustor for a gas turbine having primary and secondary combustion zones. The combustor has primary gas fuel spray pegs for supplying a lean mixture of gaseous fuel to the primary combustion zone via a first annular pre-mixing passage and secondary fuel spray bars for supplying a lean mixture of fuel to the secondary combustion zone via a second annular pre-mixing passage. The fuel spray bars are aerodynamically shaped and a row of fuel discharge ports are formed on opposing sides of the spray bar. A pair of mixing fins project outwardly from the spray bar sides. The fins create turbulence in the air flow that ensures adequate mixing of the fuel and air. The fins have sufficient height and are displaced sufficiently far from the fuel discharge ports so that although the turbulence has not dissipated by the time the air flow reaches the fuel discharge ports, the zone of recirculation located downstream from the fins does not extend to the fuel discharge ports.
    Type: Grant
    Filed: November 7, 1995
    Date of Patent: July 15, 1997
    Assignee: Westinghouse Electric Corporation
    Inventors: Mehran Sharifi, Mitchell O. Stokes, David T. Foss
  • Patent number: 5620492
    Abstract: Quenching apparatus (12) for use in glass heat treatment apparatus comprises a plurality of air flow amplifiers (32) carried on manifolds (26, 28) and arranged in arrays to direct cooling air onto both surfaces of glass (16) being treated. Compressed air is supplied to the manifolds (26, 28) from air receivers (22) charge by a compressor (20) the compressed air flow being controlled by a control valve (24). Air flow received by the air flow amplifiers (32) from the manifolds (26, 28) is amplified to supply a flow of cooling air directed towards the sheet of glass (16). The air flow amplifiers (32) may be air ejectors. A furnace (10) is provided to heat the glass (16) and a conveyor is provided to carry the glass (16) from the furnace (10) to the quenching apparatus.
    Type: Grant
    Filed: January 30, 1996
    Date of Patent: April 15, 1997
    Inventor: Michael B. Land
  • Patent number: 5435489
    Abstract: Nozzles for discharging high velocity air are positioned on either side of an aircraft engine exhaust duct exit. High velocity air is discharged tangential to an outer surface of each nozzle and follows the contour thereof. The nozzles are positioned so that when the high velocity air separates from the outer surface of the respective nozzles, it flows outwardly relative to the aircraft's fuselage structure. The high velocity air from the nozzle closest to the aircraft's fuselage structure impinges on the exhaust gas stream, deflecting the stream away from the fuselage. The high velocity air from the nozzle furthest from the fuselage creates a low pressure area which deflects the exhaust gas stream away from the fuselage. In combination, the two nozzles deflect the exhaust gas stream away from the fuselage to a significant degree.
    Type: Grant
    Filed: January 13, 1994
    Date of Patent: July 25, 1995
    Assignee: Bell Helicopter Textron Inc.
    Inventors: Julian L. Jenkins, Tommie L. Wood, Albert G. Brand
  • Patent number: 5407135
    Abstract: A hand-held air blower device for directing a jet of air in a desired direction, including a barrel having a longitudinal axis and having a low pressure air inlet at an upstream end for admitting air at atmospheric pressure and an outlet at an opposite downstream end for the jet of air, the barrel having a throat, intermediate its ends, whose inner wall has a convex contour, and the barrel having a narrow high pressure air inlet slot, with an upstream and a downstream side wall in relation to the direction of air flow through the barrel immediately adjacent the throat on the low pressure air inlet side of the throat. The convex contour of the inner wall of the throat, along the longitudinal axis of the barrel between its ends, is disposed at a small acute angle to the downstream side wall of the high pressure air inlet slot, and changes progressively downstream to being disposed at a small acute angle to the longitudinal axis. A handle is connected to the barrel.
    Type: Grant
    Filed: November 16, 1993
    Date of Patent: April 18, 1995
    Assignee: Imperial Chemical Industries PLC
    Inventor: Christopher S. Jeffs
  • Patent number: 5402938
    Abstract: An air amplifier is provided for use in pneumatic control systems that can operate over a wide range of flow and pressure characteristics, and can additionally operate against a back pressure. The air amplifier utilizes a tapered shim that causes the pressurized air to follow a Coanda profile over a wider range (and against a back pressure) than is possible when using only a slotted, non-tapered shim. The shim is ring-shaped with a planar surface and includes inwardly directed tangs that are cut-off to provide an open central area. Some or all of the tangs are tapered along either one or both sides of the tang.
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: April 4, 1995
    Assignee: Exair Corporation
    Inventor: Roy O. Sweeney
  • Patent number: 5347103
    Abstract: A convection furnace using a shimmed gas amplifier to provide a flow of gas over a heating element is disclosed. The heating element is mounted in a substantially leak proof, pressurizable heating chamber. A gas amplifier in an upper plate of the chamber draws gas from a surrounding plenum into the heating chamber at a high flow rate. The pressure in the chamber increases from the input of pressurized gas and the heating of gas flowing over the heating element. The gas amplifier is provided with a toothed spacing shim which creates a stronger flow into the chamber. The stronger flow is capable of resisting the back pressure on the flow from the high pressure in the chamber. The heated gas passes through a plurality of orifices in a lower plate of the chamber to impinge on product traveling below the heating chamber on a conveyor and is recirculated via the plenum to the gas amplifier. The heat transfer rate in the chamber may be controlled by controlling the input flow rate to the gas amplifier.
    Type: Grant
    Filed: August 31, 1993
    Date of Patent: September 13, 1994
    Assignee: BTU International
    Inventor: Pierre J. LeMieux
  • Patent number: 5259815
    Abstract: A air outlet for a passenger compartment of a vehicle has a duct forming a jet of air, a pair of lateral sidewalls, bounded by the top and bottom walls diverging from each other from their upstream ends to their downstream ends at a rate sufficient to preclude a stable wall effect and for causing aperiodic oscillation of the jet into the passenger compartment of said vehicle. Various means are disclosed to further destabilize the wall effect.
    Type: Grant
    Filed: August 3, 1990
    Date of Patent: November 9, 1993
    Assignee: Bowles Fluidics Corporation
    Inventors: Ronald D. Stouffer, Michael C. David, David A. Bray
  • Patent number: 5188868
    Abstract: A method for coating surfaces of a powdered material includes forming a Coanda flow of a Coanda spiral flow of a powdered material by flowing the powdered material through a Coanda spiral flow forming passage or a Coanda flow forming passage by introducing a pressurized gas into the flow forming passage through a Coanda slit therearound, supplying the thus formed Coanda flow or Coanda spiral flow of powdered material into a further Coanda spiral flow forming passage, and atomizing a liquid coating material with a liquid gas and then directing the atomized liquid coating material into the Coanda flow or Coanda spiral flow of powdered material through a Coanda slit in the further Coanda spiral flow forming passage.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: February 23, 1993
    Assignee: Fukuvi Chemical Industry Co., Ltd.
    Inventors: Kiyoshi Horii, Hiroaki Sawazaki
  • Patent number: 5110285
    Abstract: Method and apparatus for changing the direction of a fluid stream injected into a combustion zone wherein a flow of biasing fluid is provided to a high velocity fuel or oxidant stream in a perpendicular direction proximate the inlet of an outwardly tapered cavity, causing the fluid stream to be deflected toward a wall of the cavity and to flow in a direction along the wall by a pressure differential across the fluid stream.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: May 5, 1992
    Assignee: Union Carbide Industrial Gases Technology Corporation
    Inventors: William J. Snyder, John E. Anderson
  • Patent number: 5071683
    Abstract: Method and device for forming a gellified polyrethane layer on a surface, notably of a mould, by spraying a liquid reaction mixture comprising polyol and isocyanates and which has a viscosity between 20 and 2000 centipoises. The mixture is sprayed in the form of a film of liquid and/or raindrops of which the main part has a mean diameter (Medium Volume Diameter; "M.V.D.") which, according to the standards ASTM E 779-81, is larger than 100 microns and preferably larger than 500 microns.
    Type: Grant
    Filed: July 8, 1988
    Date of Patent: December 10, 1991
    Assignee: Gechem and Recticel
    Inventors: Jacques Verwilst, Hugo De Winter, Andre Braeckman, Bernard De Baes
  • Patent number: 5056718
    Abstract: A jetting nozzle for producing a high velocity fluid has its external surface formed as a fluidic surface and directs a second lower velocity jet of fluid, which may be the same as or different from the fluid of the high velocity jet, onto the external surface such that the fluid of the second jet flows in contact with the fluidic surface to surround the high velocity jet, thereby reducing the rate of divergence of the high velocity jet preserving its energy and increasing its effective range.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: October 15, 1991
    Inventor: Anthony W. Wakefield
  • Patent number: 4933072
    Abstract: An elongated, horizontal and at least partially closed air jet dispersion and air jet entrained material deceleration zone is provided and one end of the zone includes at least skewed velocity distribution nozzle of the circular Coanda surface-type opening inwardly along the zone toward the other end thereof. The zone includes discharge structure defining a plurality of downwardly opening gravity-type outlets spaced longitudinally along the zone and duct structure for flowing air and airflow entrained solids therethrough at high velocity is provided. The duct structure includes an outlet end opening into the nozzle and an inlet end open to the ambient atmosphere and positioned to receive gravity discharged solid materials from the outlet spaced one outlet from the aforementioned one end of the zone.
    Type: Grant
    Filed: December 17, 1984
    Date of Patent: June 12, 1990
    Inventor: Victor A. Beisel
  • Patent number: 4847035
    Abstract: To produce non-woven materials, endless filaments in the form of a warp are drawn off a filament draw-off nozzle to which are joined a filament offlet, a filament guide tube and a spreading extruder. An amount of compressed air under high pressure is admitted to the filament draw-off nozzle. By means of the invention the amount of compressed air at the filament draw-off nozzle is reduced and at the same time an additional amount of compressed air under relatively low pressure is admitted between the filament guide tube and the spreading extruder by means of a propelling nozzle. In spite of an additional amount of compressed air at the propelling nozzle the reduction at the filament draw-off nozzle is so large that for the isothermal compression output as a whole a considerable savings in energy of almost 30% can be achieved, and this while maintaining the important filament draw-off force necessary for the drawing of the filaments inside the filament offlet.
    Type: Grant
    Filed: November 20, 1986
    Date of Patent: July 11, 1989
    Assignees: J. H. Benecke, AG, Corovin GmbH
    Inventors: Kurt Mente, Gerhard Knitsch
  • Patent number: 4779586
    Abstract: An internal combustion engine air cleaner has a bent inlet diffuser of certain geometry that allows it to be significantly shorter than but at least as effective as a straight inlet diffuser.
    Type: Grant
    Filed: January 15, 1988
    Date of Patent: October 25, 1988
    Assignee: General Motors Corporation
    Inventor: John A. White, Jr.
  • Patent number: 4757812
    Abstract: An apparatus for production of ultra-fine homogenous aerosols, or a nebuliser, is described comprising a Coanda-plate (1) and a liquid channel (3) opening in the vicinity thereof, preferably through an orifice plate (2). The apparatus is useful for producing a micro-aerosol in medical treatment and in other fields. The aerosol is produced from a liquid film formed on the Coanda-plate, which film flows over the plate under radial thinning and breaks into small homogenous droplets at the edge of said plate. Preferably the apparatus is provided with a liquid container (5) surrounding the Coanda-plate.
    Type: Grant
    Filed: January 15, 1987
    Date of Patent: July 19, 1988
    Inventor: Mans Arborelius, Jr.
  • Patent number: 4728277
    Abstract: The invention provides an air operated film-handling or stabilizing device that can be used with most thin flexible films or webs, such as plastics, paper, thin metal, etc. The configuration of the device depends upon the shape of the sheet and, for example, is flat for flat sheets and ring-shaped for use in blown plastics film production to surround the blown bubble. The device provides two opposite orifices which discharge respective streams of air in opposite directions over respective surfaces which are parallel to the face of the film to be handled and/or stabilized. A third surface is disposed between the two orifices also parallel to the film face, but spaced further from it than the two first-mentioned faces, resulting in a zone of lower air pressure that urges the film toward the third surface, but without the possibility of touching it, or the other two surfaces, so that the film is held by the force in a stable location relative to the device.
    Type: Grant
    Filed: December 30, 1986
    Date of Patent: March 1, 1988
    Inventor: Mirek Planeta
  • Patent number: 4718870
    Abstract: A marine propulsion water jet system which operates at high efficiency and automatically adjusts itself to maintain a relatively constant primary injection water velocity over a wide speed range. The propulsion system includes a fluid flow amplifier by which a high velocity principal water flow is injected into a slower velocity secondary water flow to form a water jet. The fluid flow amplifier includes an adjustable orifice through which the principal water flow is injected into the secondary water flow and the size of the orifice is automatically adjusted in order to maintain a relatively constant water jet velocity.
    Type: Grant
    Filed: November 22, 1985
    Date of Patent: January 12, 1988
    Assignee: Techmet Corporation
    Inventor: Leonard Watts
  • Patent number: 4718178
    Abstract: A gas nozzle for a dryer apparatus for use with moving webs includes a planar pressure plate with an upstream end portion and a downstream terminus portion and a gas discharge nozzle disposed at the upstream portion of the pressure plate to define a slot for gas flow parallel to the pressure plate. The nozzle includes a first jet forming plate which engages the upstream end portion of the pressure plate and at obtuse angle and which includes a vortex forming step. The nozzle also includes a second jet forming plate located a distance from the first jet forming plate. The two jet forming plates and the step define a passageway for gas flow parallel to the pressure plate.
    Type: Grant
    Filed: November 29, 1985
    Date of Patent: January 12, 1988
    Inventor: Rodger E. Whipple
  • Patent number: 4685221
    Abstract: Disclosed is a steam-shower apparatus and method including a supply of steam which is fed through a Coanda nozzle and along a path running parallel with one surface of the apparatus. The sheet to which the steam is to be applied runs parallel to this same surface of the machine, but in a direction opposite to the direction of the flow of steam. The sheet travels along a path spaced slightly from the surface of the machine, and the flow of steam runs the entire length of this surface heating the sheet as it flows in the opposite direction. The apparatus may be divided into several sections so that the sheet may be profiled along certain regions which are defined by these sections. In addition, means are included for altering the volume of flow to any one of the particular sections.
    Type: Grant
    Filed: February 28, 1986
    Date of Patent: August 11, 1987
    Assignee: Thermo Electron - Web Systems, Inc.
    Inventors: Bruce F. Taylor, Kenneth G. Hagen
  • Patent number: 4653693
    Abstract: A peripheral jet fire fighting fog nozzle having mounted on the discharge end thereof a stream-shaping sleeve provided with a convex end face adapted to form an open outer cone-like spray pattern and a plurality of circumferentially spaced fog teeth extending axially from the convex end face with axially extending convex lateral surfaces on the teeth adapted to spread the spray pattern laterally and fill in the lateral opening or gaps in the outer spray pattern. Rounded axially extending inner end surfaces provided on the fog teeth together with adjacent lateral surfaces of the fog teeth are adapted to form uniform droplets which are uniformly distributed within the interior of the outer conical spray pattern to form a uniform conical spray pattern which has a wide angle of divergence and is free of circumferential gaps.
    Type: Grant
    Filed: August 27, 1984
    Date of Patent: March 31, 1987
    Assignee: Task Force Tips Incorporated
    Inventor: Robert W. Steingass
  • Patent number: 4643775
    Abstract: A method and apparatus for cleaning and conditioning a fabric in which pressurized fluid is directed into a restricted and diminishing passageway formed by the fabric and a member forming an extended nip therewith so that the fluid is forced through the fabric.
    Type: Grant
    Filed: June 29, 1984
    Date of Patent: February 17, 1987
    Assignee: Crown Zellerbach Corporation
    Inventors: Imants Reba, Rodney E. Pollock
  • Patent number: 4634372
    Abstract: A Coanda flare for disposing of gas-liquid combustible materials has a Coanda body of the external type positioned across a high pressure line to form an annular slot. The annular slot acts as an outlet for high pressure gas-liquid combustible materials and directs the issuing materials over the outer surface of the Coanda body thereby entraining surrounding air. The ratio of the radius of curvature of the Coanda body to the annular slot width is in the range 4 to 100 and the ratio of the diameter of the high pressure line to the radius of curvature of the Coanda body is in the range 0.2 to 25.
    Type: Grant
    Filed: March 1, 1985
    Date of Patent: January 6, 1987
    Assignee: The British Petroleum Company p.l.c.
    Inventors: Stephen M. Allum, David A. Chesters
  • Patent number: 4634050
    Abstract: A concentric multiple tube assembly forms an axial eductor passage for educed ambient air flow unobstructed from the inlet end to the outlet end. Ambient air eduction occurs as a result of ejection of compressed air or compressed air and water via at least one set of compressed air and water ejection orifices oblique to the inner tube sidewall defining the eductor passage and at a skewed trajectory angle such that the compressed air streams attach to the inner tube side wall opposite the orifices ejecting the same via Coanda effect. By wall attachment, a water film on the tube inner wall enhances the cooling effect of the air stream passing therethrough by evaporation thereof. Compressed air and water are delivered to annular chambers within the tubular assembly. Preferably, water mixes with the compressed air in one of the chambers prior to ejection into the eductor passage.
    Type: Grant
    Filed: January 3, 1986
    Date of Patent: January 6, 1987
    Inventor: James H. Shippee
  • Patent number: 4601178
    Abstract: A water supply unit for an ice-making machine provided with a pair of freezing plates each presenting number of vertically extending partitions on their front sides, the freezing plates being mounted in an upright position with their rear sides facing to each other, and with a cooling coil mounted between the rear sides of the freezing plates. The water supply unit is placed on the top of the freezing plates and has an ice-making water conduit section connecting to the front surfaces of the freezing plates via water supply plates and a flushing water conduit section connecting to the rear sides of the freezing plates. The flushing water conduit section of the supply unit is received into and fitted between the upper ends of the freezing plates for securely positioning the water supply unit with respect to the freezing plates.
    Type: Grant
    Filed: November 23, 1984
    Date of Patent: July 22, 1986
    Assignee: Hoshizaki Electric Co., Ltd.
    Inventors: Tomio Suyama, Tadashi Sakai
  • Patent number: 4580729
    Abstract: A fire protection sprinkler head which can reduce or substantially eliminate frame shadow effects that produce non-uniformity in spray pattern. The head is of the known type having a base with a throat through which fire retardant fluid flows and two or more frame arms which extend outwardly from the base and joint in an arch-form to support, in the path of fluid discharged from the throat, a central boss which deflects the fluid outwardly.
    Type: Grant
    Filed: January 22, 1985
    Date of Patent: April 8, 1986
    Assignee: Grinnell Fire Protection Systems Co., Inc.
    Inventor: Donald B. Pounder
  • Patent number: 4570533
    Abstract: A fluid deflecting assembly comprising a passage defining structure having a fluid passage defined therein for the passage of a fluid stream in one direction therethrough and having a fluid inlet and a fluid exit spaced apart from the fluid inlet, and at least one group of deflector blades pivotally supported within the passage defining structure adjacent the fluid exit for movement through a predetermined angle and arranged in such a curved row that, when the deflector blades are pivoted in one direction to a deflecting position, the deflecting blades altogether form a generally continuously curved guide wall extending within the passage defining structure so as to diverge away from the direction of flow of the fluid stream through the passage. The guide wall is operable to draw the fluid stream close thereto to deflect the fluid stream as a whole by the Coanda effect known per se as it emerges outwards from the fluid exit.
    Type: Grant
    Filed: October 15, 1984
    Date of Patent: February 18, 1986
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Norio Sugawara, Motoyuki Nawa
  • Patent number: 4561380
    Abstract: A method and apparatus is disclosed, in the presently preferred embodiment, for applying powdered adhesive to non-woven fabric material. The apparatus includes a novel powder spray gun wherein there is an air flow amplifier contained within the gun for accelerating the velocity of powder emitted from the gun and sprayed onto the top of a conveyorized web of the fabric material. The apparatus also includes a novel system for supplying powder to the spray gun, which system includes a first powder pump, a back-up pump and a control circuit responsive to detection of reduced powder flow to the gun to switch supply from the first pump to the back-up pump.
    Type: Grant
    Filed: June 21, 1984
    Date of Patent: December 31, 1985
    Assignee: Nordson Corporation
    Inventors: Douglas C. Mulder, David E. O'Ryan
  • Patent number: 4558822
    Abstract: A binary atomizing nozzle includes a housing having a liquid insert and a gas insert. The liquid insert has an interior chamber and a liquid inlet and a liquid discharge communicate with the chamber. A spin insert is positioned in the chamber so that liquid flowing from the chamber is given a rotational spin and exits the liquid discharge as a hollow cone. The spin insert is threadedly engaged with the wall of the chamber so that the liquid discharge constantly wets the wall portion of the flaring discharge. The liquid insert has an outer portion spaced from the gas insert and provides an axially extending annular chamber having a gas discharge. The liquid discharge is axially spaced a preselected distance from the gas discharge so that gas exiting the gas discharge flows along the outer portion of the liquid insert according to the Coanda effect and thereby atomizes the liquid exiting the liquid discharge.
    Type: Grant
    Filed: August 18, 1983
    Date of Patent: December 17, 1985
    Assignee: Lechler GmbH & Co. KG
    Inventors: Wolfgang Nieuwkamp, Sepp Mezger
  • Patent number: 4557637
    Abstract: Apparatus for transferring solid particles to a receptacle comprises a loading tube (2) surrounded at or near its base by a gas supply chamber (7) terminating in a Coanda surface (9). A slot (10) between the outlet from the loading tube (2) and the beginning of the Coanda surface (9) forms a Coanda nozzle. A throttle (3) is preferably fitted in the loading tube (2) to form an annulus (4) down which the particles flow to the slot (10). A gas supply line (8) preferably enters a gas supply (7) tangentially to supply gas to the Coanda nozzle. The apparatus is particularly suitable for loading catalyst into a reactor.
    Type: Grant
    Filed: November 16, 1983
    Date of Patent: December 10, 1985
    Assignee: The British Petroleum Company Limited
    Inventors: John L. Barclay, Geoffrey C. Stevens, Brian Stokes, Denis S. Ward
  • Patent number: 4556172
    Abstract: A flow direction controller mounted on the outlet of an air conditioner or the like and adapted to control the blowing direction of the air. The flow direction controller is composed mainly of two flow-attaching walls and a control blade rotatable on a shaft. The control blades has two surfaces each producing a flow biasing effect and a curved surface. With this arrangement, it is possible to deflect the flow of blowing air over a wide angular range and also to realize a split-flow blowing without being accompanied by a substantial reduction in the air flow rate, by making efficient use of the attachment of the flow components to the attaching walls and the curved surface.
    Type: Grant
    Filed: January 25, 1984
    Date of Patent: December 3, 1985
    Assignee: Matsushita Electric Industrial Co. Ltd.
    Inventors: Norio Sugawara, Motoyuki Nawa, Yutaka Takahashi
  • Patent number: 4539930
    Abstract: A device for producing metallic particles utilizing the Coanda Effect to draw one stream of gas toward another stream of gas flowing over a foil. Molten metal is introduced between the two gas streams, and the resulting interaction breaks up the molten metal flow into particles of appropriate size, shape, composition and the like. Various embodiments can be used for the process of producing cast articles, while other versions can be used for the process of coating and deposition of the particles in liquid, solid or partially solidified form onto a substrate.
    Type: Grant
    Filed: April 27, 1984
    Date of Patent: September 10, 1985
    Assignee: Teledyne Industries, Inc.
    Inventors: Earl N. Stuck, Victor F. Zackay
  • Patent number: 4524911
    Abstract: A liquid spray nozzle especially designed to spray vaporizable liquid fire extinguishant onto an explosive fireball. A minor portion of the incoming liquid is used to develop transversely directed liquid pulses which act on the liquid mainstream to deflect the stream from one nozzle boundary wall to another boundary wall. The exit stream from the nozzle exhibits a transversely oscillating character for minimizing vacant spots in the spray pattern while achieving a relatively divergent spray cross section. The method of oscillating the mainstream uses a relatively small energy expenditure so that the mainstream has a relatively long spray penetration distance.
    Type: Grant
    Filed: February 21, 1984
    Date of Patent: June 25, 1985
    Inventor: Edward J. Rozniecki
  • Patent number: 4509694
    Abstract: The electrostatic nozzle may be used to spray one or more charged clouds in different areas of an enclosed room to allow different materials to be deposited on different sections of the surfaces. The nozzle includes a conduit through which air passes over one or more airfoils to entrain a liquid across the surface. A charged electrode, facing the surface, inductively charges the liquid on the surface. The liquid is atomized at the trailing edge of the airfoil by a cross-current created by an air deflector near the trailing edge of the airfoil.
    Type: Grant
    Filed: June 1, 1983
    Date of Patent: April 9, 1985
    Assignee: Canadian Patents & Development Limited
    Inventors: Ion I. Inculet, Kenneth J. Hodgson
  • Patent number: 4504014
    Abstract: A device (10) for atomizing a liquid is disclosed. The device (10) includes a sprayhead (14) receiving blown air through conduit (26) from boom (12). The air flows over wing 44 to create a region of reduced pressure within rectangular opening (64). A single stream of liquid is projected into opening (64) from where it flows over the secondary wing to trailing edge (54) for breakup and atomization within the vortex and turbulent flow following wing (44). Sprayhead (14) has a pair of elliptical nozzles (30, 32) superimposed on and orthogonally oriented with respect to one another to provide a proper projection pattern.
    Type: Grant
    Filed: January 31, 1983
    Date of Patent: March 12, 1985
    Assignee: D & W Industries, Inc.
    Inventor: Wilfred D. Leuning
  • Patent number: 4486167
    Abstract: A high pressure gas flare using the Coanda effect has a noise attenuator surrounding the high pressure gas outlet slot. The noise attenuator is in the form of one or more upwardly diverging frusto-conical shields which may be spaced apart or closed with the body of the flare. The attenuator is particularly useful for steam driven flares.
    Type: Grant
    Filed: December 1, 1981
    Date of Patent: December 4, 1984
    Assignee: The British Petroleum Company Limited
    Inventors: Robert McMurray, Gerald Pratley
  • Patent number: 4486470
    Abstract: A device for producing metallic particles utilizing the Coanda Effect to draw one stream of gas toward another stream of gas flowing over a foil. Molten metal is introduced between the two gas streams, and the resulting interaction breaks up the molten metal flow into particles of appropriate size, shape, composition and the like. Various embodiments can be used for the process of producing cast articles, while other versions can be used for the process of coating and deposition of the particles in liquid, solid or partially solidified form onto a substrate.
    Type: Grant
    Filed: September 15, 1983
    Date of Patent: December 4, 1984
    Assignee: Teledyne Industries, Inc.
    Inventors: Earl N. Stuck, Victor F. Zackay
  • Patent number: 4484710
    Abstract: A nozzle for discharging vaporizable liquid fire suppressant material tow a flame area to be suppressed. A nozzle includes internal mechanism for forcing an insulator shroud around the liquid fire suppressant while the suppressant is still within the nozzle. The shroud insulates the liquid material while the liquid stream is traveling toward the target flame, thereby preventing premature flashing or vaporization of the liquid. A particular aim of the invention is to increase the penetration distance, i.e., travel distance before the liquid is dissipated.
    Type: Grant
    Filed: March 11, 1983
    Date of Patent: November 27, 1984
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Edward J. Rozniecki
  • Patent number: 4472888
    Abstract: A Coanda effect nozzle includes first and second longitudinal airfoils mounted in spaced apart relationship generally transverse to the travel of the web. A mechanism is mounted between the first and second airfoils to define orifices adjacent each of the airfoils, so as to create first and second Coanda streams of air along the first and second airfoils, respectively. The first stream of air travels in a direction opposite to the travel of the second stream of air. The first and second streams of air travel generally parallel to the web.
    Type: Grant
    Filed: June 4, 1982
    Date of Patent: September 25, 1984
    Assignee: Cary Metal Products, Inc.
    Inventor: Anthony K. Spiller
  • Patent number: 4464110
    Abstract: A high pressure gas flare using the Coanda effect and having an internal passageway for low pressure fuel gas has a high pressure gas flow modifier on the outer surface of the Coanda body. The flow modifier may be in the form of one or more projections downstream from the high pressure gas outlet, the projections tending to stabilize the flame.
    Type: Grant
    Filed: December 1, 1981
    Date of Patent: August 7, 1984
    Assignee: The British Petroleum Company Limited
    Inventors: John C. Boden, Gerald Pratley
  • Patent number: 4448354
    Abstract: A circular thrust augmenting ejector has an annular wall which defines a central passageway and a convergent contoured inlet section, a constant area cylindrical mixing section and a divergent conical diffuser outlet section. The inlet, mixing and outlet sections merge one into the next in axisymmetric serial relationship. The ejector also has a plurality of discrete primary nozzles arranged about the periphery of the annular wall at the entrance to the inlet section thereof for injecting a primary flow of high velocity air into the inlet section and thereby entraining a secondary flow of ambient air into the central passageway of the ejector.
    Type: Grant
    Filed: July 23, 1982
    Date of Patent: May 15, 1984
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Steven G. Reznick, Milton E. Franke
  • Patent number: 4446695
    Abstract: An aircraft propulsion assembly in which a prime mover drives a rotating air stream generating element, situated in a generally circular housing that supports a ring shaped stator in which a number of circumferentially spaced slots are defined. An elongate nozzle is axially aligned with the rotating element, which nozzle on the forward end in cooperation with the housing defines a circular plenum chamber that is in communication with the slots. The plenum chamber on an inner portion thereof cooperates with the stator to define a circular aperture. A first portion of the air stream generated by the rotating element flows rearwardly through the nozzle and a second portion through the slots in to the plenum chamber to be compressed. The compressed air excapes from the plenum chamber through the circular aperture, and due to the Coanda effect flows along the interior surface of the nozzle as a cylindrical sheath at a higher velocity than the first portion of the air stream flowing rearwardly through the nozzle.
    Type: Grant
    Filed: November 6, 1981
    Date of Patent: May 8, 1984
    Inventor: Wilson A. Burtis
  • Patent number: 4431135
    Abstract: Efficient and silent air nozzle assembly for discharging a small amount of compressed gas, such as air, to entrain a larger amount of secondary air and direct or focus the composite air mixture against a work station, such as for cleaning or ejection purposes. The air nozzle comprises a conduit having an exit orifice into which is pressed a solid nozzle plug having a multiplicity of peripheral longitudinal surface recesses which provide a multiplicity of small gas passages between the plug and the inner surface of the conduit. The plug has an inwardly tapered tip which extends out of the exit orifice of the conduit to cause the exiting gas to entrain surrounding or secondary air and direct the gas-air mixture along the tapered surface thereof where it converges as a concentrated air flow.
    Type: Grant
    Filed: November 25, 1981
    Date of Patent: February 14, 1984
    Inventor: Richard G. Kaye
  • Patent number: 4347981
    Abstract: A turret type sprinkler comprising a base having inlet hose fitting for connection with a hose communicating with a source of water under pressure and a turret assembly mounted on the base for indexed rotational movement about a generally vertical axis. The turret assembly includes upper and lower cooperating annular members fixedly secured in cooperating relation providing a plurality of spray head structures spaced annularly about the axis of indexed rotation thereof. Each of the spray head structures includes a water inlet extending upwardly from a downwardly facing annular surface on the lower annular member in a position to be communicated with a water outlet on the base in one operative position of indexed rotation.
    Type: Grant
    Filed: October 6, 1980
    Date of Patent: September 7, 1982
    Assignee: L. R. Nelson Corporation
    Inventor: Jerry R. Hayes