Patents by Inventor Karl Heikurinen

Karl Heikurinen 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).

  • LOW HUB-TO-TIP RATIO FAN FOR A TURBOFAN GAS TURBINE ENGINE
    Publication number: 20170268529
    Abstract: A fan for a turbofan gas turbine engine having a low hub-to-tip ratio is disclosed. The fan includes a rotor hub and a plurality of radially extending fan blades. Each fan blade defines a hub radius (RHUB), which is the radius of the leading edge at the hub relative to a centerline of the fan, and a tip radius (RTIP), which is the radius of the leading edge at a tip of the fan blade relative to the centerline of the fan. The ratio of the hub radius to the tip radius (RHUB/RTIP) is less than 0.29. In a particular embodiment, this ratio is between 0.25 and 0.29. In another particular embodiment, this ratio is less than 0.25.
    Type: Application
    Filed: June 7, 2017
    Publication date: September 21, 2017
    Inventors: Karl HEIKURINEN, Peter TOWNSEND
  • Low hub-to-tip ratio fan for a turbofan gas turbine engine
    Patent number: 9709070
    Abstract: A fan for a turbofan gas turbine engine having a low hub-to-tip ratio is disclosed. The fan includes a rotor hub and a plurality of radially extending fan blades. Each fan blade defines a hub radius (RHUB), which is the radius of the leading edge at the hub relative to a centerline of the fan, and a tip radius (RTIP), which is the radius of the leading edge at a tip of the fan blade relative to the centerline of the fan. The ratio of the hub radius to the tip radius (RHUB/RTIP) is less than 0.29. In a particular embodiment, this ratio is between 0.25 and 0.29. In another particular embodiment, this ratio is less than 0.25.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: July 18, 2017
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Karl Heikurinen, Peter Townsend
  • LOW HUB-TO-TIP RATIO FAN FOR A TURBOFAN GAS TURBINE ENGINE
    Publication number: 20160238022
    Abstract: A fan for a turbofan gas turbine engine having a low hub-to-tip ratio is disclosed. The fan includes a rotor hub and a plurality of radially extending fan blades. Each fan blade defines a hub radius (RHUB), which is the radius of the leading edge at the hub relative to a centerline of the fan, and a tip radius (RTIP), which is the radius of the leading edge at a tip of the fan blade relative to the centerline of the fan. The ratio of the hub radius to the tip radius (RHUB/RTIP) is less than 0.29. In a particular embodiment, this ratio is between 0.25 and 0.29. In another particular embodiment, this ratio is less than 0.25.
    Type: Application
    Filed: February 24, 2016
    Publication date: August 18, 2016
    Inventors: Karl Heikurinen, Peter Townsend