Patents by Inventor Ulf Jansson

Ulf Jansson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5366288
    Abstract: An apparatus for mixing pulp and fluid includes a housing with a center line an inlet and outlet for the pulp; an inlet for the supply of fluid and two walls are arranged in the housing and have opposite sides which between them define a gap-shaped surface through which the pulp will flow and has inlet and outlet openings communicating with the pulp inlet and outlet respectively; the walls are arranged concentrically in the housing and are non-rotatable with opposite sides thereof being arranged to extend around the central line of the housing, spaced therefrom, the gap-shaped space thus acquiring the shape of a concentric annular gap; the annular gap has an extension in excess of 20 mm in the main flow direction of the medium flowing through it; there is a distribution chamber communicating with and arranged axially upstream of the annular gap in order to distribute the pulp uniformly around the entire concentric inlet opening of the annular gap.
    Type: Grant
    Filed: September 9, 1993
    Date of Patent: November 22, 1994
    Assignee: Kamyr Aktiebolag
    Inventors: Hakan Dahllof, Rolf Ekholm, Ulf Jansson
  • Patent number: 5234550
    Abstract: A wall means intended for apparatus for separation of a liquid-containing portion from a liquid-containing particle material which is fed through the apparatus in a predetermined direction (A). The wall means comprises a plurality of bar profiles defining continuous slots between them to allow through the liquid-containing portion. According to the invention each bar profile has on its inner side facing the liquid-containing particle material a ridge portion extending between the ends of the bar profile and being provided with two continuous guide surfaces which, as seen in a cross section of the rod profile, are inclined in relation to the drainage direction (B) of the liquid-containing portion through the adjacent slot. Furthermore, the inclined guide surfaces in their longitudinal direction are disposed to coincide with the predetermined direction of feed (A) of the liquid-containing particle material in order to influence the liquid-containing particle material to maintain this direction of feed (A).
    Type: Grant
    Filed: July 10, 1991
    Date of Patent: August 10, 1993
    Assignee: Kamyr Aktiebolag
    Inventors: Rolf Ekholm, Ulf Jansson
  • Patent number: 5209641
    Abstract: An apparatus for fluidizing, degassing and pumping a suspension of fibrous cellulose material is described which comprises a housing, a fluidizing rotor and an impeller of radial type, said housing having a cylindrical portion for the rotor, a portion for the impeller which is radially enlarged in relation to the cylindrical portion, a wall closing one end of the housing and a shaft rigidly connected to the impeller, an axial inlet for suspension being disposed at the cylindrical portion, and a radial outlet for suspension at the radially enlarged portion. The apparatus has also a degassing system for removing gas which collects in front of the impeller and comprising an opening in the impeller and the wall, the impeller having a hub, a partition and forward and rear blades. Furthermore, the impeller is provided with a concentric, circular inlet for the continuous supply of suspension to the rear blade space, the rear blades being arranged to exert a pump action on the suspension supplied to the apparatus.
    Type: Grant
    Filed: May 29, 1991
    Date of Patent: May 11, 1993
    Assignee: Kamyr AB
    Inventors: Ronny Hoglund, Ulf Jansson
  • Patent number: 5039320
    Abstract: An apparatus for fluidizing, degassing and pumping a suspension of fibrous cellulose material is described which comprises a housing, a fluidizing rotor and an impeller of radial type, said housing having a cylindrical portion for the rotor, a portion for the impeller which is radially enlarged in relation to the cylindrical portion, a wall means closing one end of the housing and a shaft rigidly connected to the impeller, an axial inlet for suspension being disposed at the cylindrical portion, and a radial outlet for suspension at the radially enlarged portion. The apparatus has also a degassing system for removing gas which collects in front of the impeller and comprising opening means in the impeller and said wall means, said impeller having a hub, a partition and forward and rear blades.
    Type: Grant
    Filed: October 3, 1989
    Date of Patent: August 13, 1991
    Assignee: Kamyr AB
    Inventors: Ronny Hoglund, Ulf Jansson