Patents by Inventor Curtis Modtland

Curtis Modtland 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).

  • Journal bearing design
    Patent number: 8608386
    Abstract: The present disclosure relates to bearings, for example, an improved journal bearing. A bushing (44) for use with a journal bearing (40) includes: a cylindricarinterior defining an interior bearing surface (46); a longitudinal axis (45) and an internal diameter (ID); a groove region of the interior bearing surface (46) having a length H along the longitudinal axis; and a set of grooves (48) in the grooved region of the interior bearing surface (46), where N is the number of grooves in the set of grooves (48). Each groove is disposed at a helix angle (?) offset from the longitudinal axis (45) of the bushing (44). The helix angle is approximately equivalent to the following equation: tangent (?)=(?×ID)/(N×H).
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: December 17, 2013
    Assignee: Dow Global Technologies LLC
    Inventors: Curtis Modtland, Hua Bai
  • Journal Bearing Design
    Publication number: 20110268378
    Abstract: The present disclosure relates to bearings, for example, an improved journal bearing. A bushing (44) for use with a journal bearing (40) includes: a cylindricarinterior defining an interior bearing surface (46); a longitudinal axis (45) and an internal diameter (ID); a groove region of the interior bearing surface (46) having a length H along the longitudinal axis; and a set of grooves (48) in the grooved region of the interior bearing surface (46), where N is the number of grooves in the set of grooves (48). Each groove is disposed at a helix angle (?) offset from the longitudinal axis (45) of the bushing (44). The helix angle is approximately equivalent to the following equation: tangent (?)=(?×ID)/(N×H).
    Type: Application
    Filed: December 7, 2009
    Publication date: November 3, 2011
    Inventors: Curtis Modtland, Hua Bai