Patents by Inventor Leif Videgren

Leif Videgren 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: 11028533
    Abstract: Aspects provide for a Whitewater processing system suitable for managing an ejected Whitewater spray during operation of a paper or board making machine. A de-air system may provide for improved removal of air from the Whitewater. A calming system may reduce turbulence in a liquid flow, reducing turbulence in the flume. The de-air system and calming system may be disposed together or separately. Certain aspects may be implemented with a turbine (e.g., used to generate electricity from the Whitewater spray). Some aspects may provide for improved handling of variable spray velocities.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: June 8, 2021
    Assignee: Valmet Aktiebolag
    Inventors: Elin Engqvist, Leif Videgren
  • Publication number: 20200131704
    Abstract: Aspects provide for a Whitewater processing system suitable for managing an ejected Whitewater spray during operation of a paper or board making machine. A de-air system may provide for improved removal of air from the Whitewater. A calming system may reduce turbulence in a liquid flow, reducing turbulence in the flume. The de-air system and calming system may be disposed together or separately. Certain aspects may be implemented with a turbine (e.g., used to generate electricity from the Whitewater spray). Some aspects may provide for improved handling of variable spray velocities.
    Type: Application
    Filed: December 23, 2019
    Publication date: April 30, 2020
    Inventors: Elin Engqvist, Leif Videgren
  • Patent number: 10550517
    Abstract: Aspects provide for a Whitewater processing system suitable for managing an ejected Whitewater spray during operation of a paper or board making machine. A de-air system may provide for improved removal of air from the Whitewater. A calming system may reduce turbulence in a liquid flow, reducing turbulence in the flume. The de-air system and calming system may be disposed together or separately. Certain aspects may be implemented with a turbine (e.g., used to generate electricity from the Whitewater spray). Some aspects may provide for improved handling of variable spray velocities.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: February 4, 2020
    Assignee: VALMET AKTIEBOLAG
    Inventors: Elin Engqvist, Leif Videgren
  • Publication number: 20180171554
    Abstract: Aspects provide for a Whitewater processing system suitable for managing an ejected Whitewater spray during operation of a paper or board making machine. A de-air system may provide for improved removal of air from the Whitewater. A calming system may reduce turbulence in a liquid flow, reducing turbulence in the flume. The de-air system and calming system may be disposed together or separately. Certain aspects may be implemented with a turbine (e.g., used to generate electricity from the Whitewater spray). Some aspects may provide for improved handling of variable spray velocities.
    Type: Application
    Filed: May 26, 2016
    Publication date: June 21, 2018
    Inventors: Elin Engqvist, Leif Videgren
  • Patent number: 8784538
    Abstract: The invention relates to a unit (3) for deaeration of drainage water from a paper machine, said unit comprising an inlet (8) for receiving the drainage water in a first flow direction, an outlet (39) for removing the drainage water to a subsequent deaeration channel, and a first chamber (5) that is arranged downstream of the inlet, said first chamber comprising a first chamber part (18), which comprises a guide wall portion (37) for redirecting the drainage water in a second flow direction that differs from the first flow direction, said guide wall portion being formed by a plurality of curved guide walls (10, 23) which interact with the drainage water so that the drainage water is decelerated and air is forced out of the drainage water, and two end walls (25, 26) which are arranged on respective sides of the guide walls, wherein each end wall of at least one of the flow channels exhibits an opening (27) that communicates with the flow channel for removing air that has been released from the drainage water in
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: July 22, 2014
    Assignee: Valmet AB
    Inventors: Jan Malm, Rune Skogsberg, Leif Videgren, Christian Ako
  • Publication number: 20120255440
    Abstract: The invention relates to a unit (3) for deaeration of drainage water from a paper machine, said unit comprising an inlet (8) for receiving the drainage water in a first flow direction, an outlet (39) for removing the drainage water to a subsequent deaeration channel, and a first chamber (5) that is arranged downstream of the inlet, said first chamber comprising a first chamber part (18), which comprises a guide wall portion (37) for redirecting the drainage water in a second flow direction that differs from the first flow direction, said guide wall portion being formed by a plurality of curved guide walls (10, 23) which interact with the drainage water so that the drainage water is decelerated and air is forced out of the drainage water, and two end walls (25, 26) which are arranged on respective sides of the guide walls, wherein each end wall of at least one of the flow channels exhibits an opening (27) that communicates with the flow channel for removing air that has been released from the drainage water in
    Type: Application
    Filed: December 8, 2010
    Publication date: October 11, 2012
    Applicant: METSO PAPER KARLSTAD AB
    Inventors: Jan Malm, Rune Skogsberg, Leif Videgren, Christian Ako
  • Patent number: 7935224
    Abstract: The invention discloses a pre-assembled self-supporting unit (1) for a twine wire forming section. The unit comprises an integrated save-all tray (25) and other integrated elements such as cross walkway (17), piping beam (10), connecting arms (8). The rolls (2) for supporting at least one forming clothing loop (4) and the other elements are mounted onto this separate unit instead of being mounted onto the same machine frame. The unit provides a diminished foot print for the forming section, and it is dimensioned to fit in a standard transport container.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: May 3, 2011
    Assignee: Metso Paper Karlstad AB
    Inventor: Leif Videgren
  • Publication number: 20090301678
    Abstract: The invention discloses a pre-assembled self-supporting unit (1) for a twine wire forming section. The unit comprises an integrated save-all tray (25) and other integrated elements such as cross walkway (17), piping beam (10), connecting arms (8). The rolls (2) for supporting at least one forming clothing loop (4) and the other elements are mounted onto this separate unit instead of being mounted onto the same machine frame. The unit provides a diminished foot print for the forming section, and it is dimensioned to fit in a standard transport container.
    Type: Application
    Filed: August 10, 2006
    Publication date: December 10, 2009
    Inventor: Leif Videgren
  • Patent number: D538311
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: March 13, 2007
    Assignee: Metso Paper Karlstad AB
    Inventors: Ulf Haraldsson, Petteri Venetjoki, Leif Videgren
  • Patent number: D607909
    Type: Grant
    Filed: December 27, 2006
    Date of Patent: January 12, 2010
    Assignee: Metso Paper Karlstad AB
    Inventors: Ulf Haraldsson, Anders Lindén, Petteri Venetjoki, Leif Videgren
  • Patent number: D609724
    Type: Grant
    Filed: December 27, 2006
    Date of Patent: February 9, 2010
    Assignee: Metso Paper Karlstad AB
    Inventors: Ulf Haraldsson, Anders Linden, Petteri Venetjoki, Leif Videgren