Radial Disc-type Motive Fluid Jet Patents (Class 417/161)
  • Patent number: 11680586
    Abstract: A Venturi type ejector having a feed duct for feeding fluid under pressure with the duct extending along a central axis. A first expansion chamber is connected to the feed duct; a first mixing chamber is connected to the expansion chamber; a first suction chamber is connected to the mixing chamber; and an exhaust chamber is connected to the first mixing chamber. The ejector where the fluid under pressure penetrates into the first expansion chamber along a plurality of directions extends in a plane that is substantially orthogonal to the central axis. A vacuum generator includes such an ejector.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: June 20, 2023
    Assignees: COVAL, INSTITUT NATIONAL DES SCIENCES APPLIQUEES DE TOULOUSE
    Inventors: Lucien Baldas, Stéphane Orieux, Loïc Joguet, Michel Cecchin, Pierre Milhau
  • Patent number: 10962028
    Abstract: A method of making an additively manufactured ejector pump includes creating a computer file defining the ejector pump in layers. The ejector pump includes a duct extending along a centerline from an upstream end to a downstream end, a nozzle extending inward from the duct including a flowpath, an annulus connected to the duct including a cavity. The method also includes building the ejector pump using an additive manufacturing process that builds the ejector on a layer-by-layer basis from the upstream end to the downstream end.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: March 30, 2021
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Kevin P. Walsh, Harold R. Mahoney
  • Patent number: 5584668
    Abstract: A multi-stage ejector pump for suction or for moving materials with the help of a working fluid within one housing is provided. The pump is designed for radial flow and includes at least one inlet for the working fluid, at least one inlet for the materials and at least one flow channel for the mixture of working fluid and materials. The pump includes at least one suction chamber per pump stage, each suction chamber being connected to a common antechamber with the intake of the materials at one end and the flow channel on the other. The flow channel is circular in shape and constructed for radially outward directed flow. The wall elements of the flow channel are comprised of ejector rings located concentrically to each other, adjacent ejector rings forming a passage for the materials between each suction chamber and the flow channel.
    Type: Grant
    Filed: February 1, 1995
    Date of Patent: December 17, 1996
    Inventor: Thilo Volkmann
  • Patent number: 5054688
    Abstract: A nozzle assembly for aerating a pressurized liquid stream to produce a discharge of foam includes a plurality of arcuate venturi throats in a circular arrangement around the center of the nozzle together with a radial air inlet to each throat which is adjustable by relative rotation of the inlet coupling and the venturi housing. Additional turbulence may be created by a screen downstream of the venturi throats and secondary air may be admitted at that point.
    Type: Grant
    Filed: December 20, 1989
    Date of Patent: October 8, 1991
    Assignee: Robwen, Inc.
    Inventor: John R. Grindley
  • Patent number: 4523894
    Abstract: An ejector pump has a ringshaped nozzle slot directed radially outwards followed by a radially directed mixing zone interacting with a secondary channel and a radially directed diffuser slot.To achieve an improved performance, and especially one having a characteristic less dependent to decreases of working medium pressure the ejector pump is comprised of two mutually fixed blocks (1, 2) having each an end surface (4, 6). Said end surfaces (4, 6) are facing each other forming an annular slot (12). The surfaces of the nozzle slot and the diffuser slot are profiled in at least one of said end surfaces (6) separated by an annular groove (7) in said end surface, which groove (7) communicates with the secondary channel. The diffuser slot height adjacent the groove (7) is larger than the nozzle slot height (h.sub.o) adjacent said groove decreasing outwardly by the way of at least two bevels, first one having an angle of bevel .alpha..sub.1 =8.degree.-15.degree. and then one having an angle of bevel=4.degree.-8.
    Type: Grant
    Filed: June 1, 1984
    Date of Patent: June 18, 1985
    Assignee: Svenska Rotor Maskiner Aktiebolag
    Inventors: Lennart Forslund, Orjan Nilsson
  • Patent number: 4425084
    Abstract: An ejector device having an adjustment characteristic which is stepless variable in dependence of the negative pressure generated by the ejector device. The ejector device comprises a portion (16) for connection with a source of positive pressure which delivers the work pressure to the ejector device (1) to give rise to the ejector action. A portion (2) includes inlet (18) for the member which is intended to use the negative pressure created by ejector device (1). The two portions (16, 2) of the ejector device (1) are stepless movable in relation to each other, and in the space therebetween is an adjustment plate (13) for controlling the suction action obtained by the ejector device (1). The outlet slit (17) of the ejector device (1) is located between the plate (13) and the portion intended for connection with the positive pressure source. The adjustment plate (13) is connected to a stem (10) which is movable in relation to the portion (2) for connection with the negative pressure member.
    Type: Grant
    Filed: November 24, 1981
    Date of Patent: January 10, 1984
    Assignee: AB Piab
    Inventor: Peter Tell
  • Patent number: 4065307
    Abstract: An imaging system comprising providing an imaging member comprising an agglomerable layer in contact with an imagewise hardenable-softenable layer and imagewise hardening said member. An image is developed by imagewise softening said member to cause relative transparentizing in the imagewise softened areas due to an agglomeration of the agglomerable layer in the imagewise softened portions of said member.
    Type: Grant
    Filed: March 2, 1973
    Date of Patent: December 27, 1977
    Assignee: Xerox Corporation
    Inventor: William L. Goffe