Patents by Inventor John M. Nemeth

John M. Nemeth 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).

  • Shaft seal assembly for hydrogen cooled turbine generator
    Patent number: 8356821
    Abstract: A seal assembly forming a seal with a rotatable shaft of a hydrogen-cooled generator is provided. The seal assembly includes a ring assembly disposed about the rotatable shaft. The ring assembly includes a fluid inlet and a fluid outlet. A hydrogen side ring is coupled to a generator frame of the generator. An insulating structure is positioned between the hydrogen side ring and the generator frame to provide electrical insulation between the hydrogen side ring and the generator frame. An air side ring is disposed adjacent to the hydrogen side ring and the seal structure is coupled to the air side ring. Structure for supplying oil to the ring assembly is provided, such that the oil flows through the ring assembly to an interface between the rotatable shaft and the seal structure so as to substantially limit direct contact between the rotatable shaft and the seal structure.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: January 22, 2013
    Assignee: Siemens Energy, Inc.
    Inventors: David M. Freal, Joseph M. Emery, John M. Nemeth
  • SHAFT SEAL ASSEMBLY FOR HYDROGEN COOLED TURBINE GENERATOR
    Publication number: 20090289420
    Abstract: A seal assembly forming a seal with a rotatable shaft of a hydrogen-cooled generator is provided. The seal assembly includes a ring assembly disposed about the rotatable shaft. The ring assembly includes a fluid inlet and a fluid outlet. A hydrogen side ring is coupled to a generator frame of the generator. An insulating structure is positioned between the hydrogen side ring and the generator frame to provide electrical insulation between the hydrogen side ring and the generator frame. An air side ring is disposed adjacent to the hydrogen side ring and the seal structure is coupled to the air side ring. Structure for supplying oil to the ring assembly is provided, such that the oil flows through the ring assembly to an interface between the rotatable shaft and the seal structure so as to substantially limit direct contact between the rotatable shaft and the seal structure.
    Type: Application
    Filed: May 23, 2008
    Publication date: November 26, 2009
    Applicant: SIEMENS POWER GENERATION, INC.
    Inventors: David M. Freal, Joseph M. Emery, John M. Nemeth