Patents by Inventor Jeff Letterman

Jeff Letterman 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).

  • Turbocharger with two-stage compressor, including a twin-wheel parallel-flow first stage
    Patent number: 8181462
    Abstract: A single-shaft exhaust gas-driven turbocharger includes two parallel-flow first-stage centrifugal compressors in series with a single second-stage centrifugal compressor, and a one-stage turbine arranged to drive both the first- and second-stage centrifugal compressors via a single shaft on which the compressors and turbine are fixedly mounted. The compressor housing defines from one to a plurality of circumferentially spaced inlet ducts for the second wheel of the first stage, and from one to a plurality of circumferentially spaced interstage ducts leading from a vaneless diffuser of the first stage into the inlet of the second stage.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: May 22, 2012
    Assignee: Honeywell International Inc.
    Inventors: Steven D. Arnold, Will J. Smith, Mike Guidry, Jeff Letterman, James Reyenga, Vai-Man Lei, Asit Singhal, Kelvin Buneirisert
  • TURBOCHARGER WITH TWO-STAGE COMPRESSOR, INCLUDING A TWIN-WHEEL PARALLEL-FLOW FIRST STAGE
    Publication number: 20100319343
    Abstract: A single-shaft exhaust gas-driven turbocharger includes two parallel-flow first-stage centrifugal compressors in series with a single second-stage centrifugal compressor, and a one-stage turbine arranged to drive both the first- and second-stage centrifugal compressors via a single shaft on which the compressors and turbine are fixedly mounted. The compressor housing defines from one to a plurality of circumferentially spaced inlet ducts for the second wheel of the first stage, and from one to a plurality of circumferentially spaced interstage ducts leading from a vaneless diffuser of the first stage into the inlet of the second stage.
    Type: Application
    Filed: June 23, 2009
    Publication date: December 23, 2010
    Inventors: Steven D. Arnold, Will J. Smith, Mike Guidry, Jeff Letterman, James Reyenga, Vai-Man Lei, Asit Singhal, Kelvin Buneirisert