Patents by Inventor Sami Siik

Sami Siik 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: 8950584
    Abstract: In a screening device, a rotor element on a rotor coaxial with a cylindrical screen drum and a cylindrical screen including: an upper surface and a front face between the surface of the rotor and the upper surface, wherein the front face faces upstream into pulp flow through a gap between the screen drum and the cylindrical screen; a trailing surface extending downstream of the pulp flow from the upper surface, wherein the trailing surface tapers to the surface of the rotor and meets the surface of the rotor at a back region of the trailing surface, and opposite sidewalls extending between the trailing surface and the surface of the rotor, wherein the opposite sidewalls gradually converge towards the back region.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: February 10, 2015
    Assignee: Andritz Oy
    Inventors: Petri Harju, Sami Siik, Simo Kiero, Ville Terava
  • Patent number: 8328021
    Abstract: An apparatus for screening a fibrous suspension including: a housing, conduits therein at least for fiber suspension being fed, reject and accept, and a rotor and a cylindrical screen drum installed in the housing, at least one of which is rotatable, whereby a surface of the rotor is provided with rotor elements in proximity to the surface of the screen drum, whereby each rotor element includes a front surface facing a flow of the fiber suspension, an upper surface and a trailing surface sloping from the upper surface towards the surface of the rotor, wherein the trailing surface of the rotor element is curved and sidewalls of the trailing surface converge at a back point of the rotor element.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: December 11, 2012
    Assignee: Andritz Oy
    Inventors: Petri Harju, Sami Siik, Simo Kiero, Ville Terävä
  • Publication number: 20090084711
    Abstract: An apparatus for screening a fibrous suspension including: a housing, conduits therein at least for fiber suspension being fed, reject and accept, and a rotor and a cylindrical screen drum installed in the housing, at least one of which is rotatable, whereby a surface of the rotor is provided with rotor elements in proximity to the surface of the screen drum, whereby each rotor element includes a front surface facing a flow of the fiber suspension, an upper surface and a trailing surface sloping from the upper surface towards the surface of the rotor, wherein the trailing surface of the rotor element is curved and sidewalls of the trailing surface converge at a back point of the rotor element.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 2, 2009
    Applicant: ANDRITZ OY
    Inventors: Petri Harju, Sami Siik, Simo Kiero, Ville Terava
  • Patent number: 7229527
    Abstract: The present invention relates to the thickening of pulp suspensions. A low consistency pulp suspension is fed to a pre-thickener (10) through an inlet conduit (18). A layer of thickened pulp, formed on a filter surface (22), is pushed along the filter surface by a cleaning member to the discharge end of the pre-thickener and is discharged through the outlet (20). The cleaning member comprises a rotating shaft (30), on which shaft at least one screw thread (32) is fixed so as to leave a free space between the shaft and the screw thread. Essentially non-thickened pulp is allowed to flow through the apparatus via this space.
    Type: Grant
    Filed: October 22, 2003
    Date of Patent: June 12, 2007
    Assignee: Andritz-Ahlstrom Oy
    Inventors: Antero Laine, Risto Ljokkoi, Olavi Pikka, Sami Siik, Harri Qvintus
  • Patent number: 6767432
    Abstract: The present invention relates to the thickening of pulp suspensions. A low consistency pulp suspension is fed to a pre-thickener (10) through an inlet conduit (18). A layer of thickened pulp, formed on a filter surface (22), is pushed along the filter surface by a cleaning member to the discharge end of the pre-thickener and is discharged through the outlet (20). The cleaning member comprises a rotating shaft (30) on which shaft at least one screw thread (32) is fixed so as to leave a free space between the shaft and the screw thread. Essentially non-thickened pulp is allowed to flow through the apparatus via this space.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: July 27, 2004
    Assignee: Andritz Oy
    Inventors: Antero Laine, Risto Ljokkoi, Olavi Pikka, Sami Siik, Harri Qvintus