Patents by Inventor Robert A. Hatch

Robert A. Hatch 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).

  • Ceramic articles having a nonporous core and porous outer layer
    Patent number: 4605594
    Abstract: Fired ceramic article, which exhibits a uniform, porous sheath and a core. The porous sheath or outer layer of the article can be filled with various infiltrates, e.g., catalysts, in order to provide the article with useful properties. The article can be prepared by treating a fired ceramic article with a leachant, e.g., hydrofluoric acid or a precursor thereof.
    Type: Grant
    Filed: August 8, 1984
    Date of Patent: August 12, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Kenneth E. Owens, Robert A. Hatch
  • Gas turbine engine fuel governor
    Patent number: 4275558
    Abstract: A recuperated gas turbine engine fuel governor which controls fuel flow in response to both mechanical and electronic input signals.
    Type: Grant
    Filed: December 22, 1977
    Date of Patent: June 30, 1981
    Assignee: The Garrett Corporation
    Inventors: Robert A. Hatch, Harvey B. Jansen, Frederic E. Bolliger, Robert B. Sumegi
  • Control for turbine and recuperator inlet temperatures
    Patent number: 4274253
    Abstract: A recuperated gas turbine engine control and method which provides improved idling and limits both turbine inlet temperature and recuperator inlet temperature to different, preselected maximum levels.
    Type: Grant
    Filed: December 22, 1977
    Date of Patent: June 23, 1981
    Assignee: The Garrett Corporation
    Inventors: Frederic E. Bolliger, Geoffrey D. Woodhouse, George B. Mattson, Bruce S. Anson, Robert A. Hatch
  • Gas turbine engine fuel control
    Patent number: 4266401
    Abstract: A control system for a gas turbine engine includes provisions for adjusting fuel flow in relation to gas generator speed, and for adjusting guide vane position in relation to power turbine speed.
    Type: Grant
    Filed: December 22, 1977
    Date of Patent: May 12, 1981
    Assignee: The Garrett Corporation
    Inventors: Robert B. Sumegi, Geoffrey D. Woodhouse, George B. Mattson, Harvey B. Jansen, Frederic E. Bolliger, Robert A. Hatch
  • Variable geometry gas turbine engine fuel and guide vane control
    Patent number: 4244181
    Abstract: A recuperated gas turbine engine fuel and guide vane control which controls fuel flow and guide vane position during engine idling and acceleration to minimize fuel consumption while providing fast acceleration for a ground vehicle.
    Type: Grant
    Filed: December 22, 1977
    Date of Patent: January 13, 1981
    Assignee: The Garrett Corporation
    Inventors: Wilfried Wiher, Geoffrey D. Woodhouse, George B. Mattson, Harvey B. Jansen, Robert A. Hatch, Leon D. Lewis
  • Catalytic converter
    Patent number: 3961907
    Abstract: Refractory catalyst supports are secured in metallic containers having different coefficients of thermal expansion by providing at least one layer of a resilient thermally resistant inorganic sheet material or paper between the support and casing and securing the paper and catalyst support in the container by foaming an inorganic material in the space between the sheet material or paper and catalyst support. A further layer of sheet material or paper may be provided adjacent the support with the foam between the separate layers of sheet material.
    Type: Grant
    Filed: December 8, 1972
    Date of Patent: June 8, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: James R. Close, William P. Wood, Robert A. Hatch, James R. Johnson
  • Method of containing a resiliently supported rigid ceramic catalyst support
    Patent number: 3959865
    Abstract: Refractory catalyst supports are secured in metallic containers having different coefficients of thermal expansion by providing at least one layer of a resilient thermally resistant inorganic sheet material or paper between the support and casing and securing the paper and catalyst support in the container by foaming an inorganic material in the space between the sheet material or paper and catalyst support. A further layer of sheet material or paper may be provided adjacent the support with the foam between the separate layers of sheet material.
    Type: Grant
    Filed: September 9, 1974
    Date of Patent: June 1, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: James R. Close, William P. Wood, Robert A. Hatch, James R. Johnson