Patents by Inventor Hugo R. Larson

Hugo R. Larson 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).

  • Manganese steel
    Patent number: 4612067
    Abstract: Austenitic (Hadfield) manganese steel containing about 25% manganese, 1.4% carbon and 0.1 to 1% silicon, balance essentially iron.
    Type: Grant
    Filed: May 21, 1985
    Date of Patent: September 16, 1986
    Assignee: Abex Corporation
    Inventors: Hugo R. Larson, Dilip K. Subramanyam
  • Erosion and corrosion resistant cast iron alloy containing chromium, nickel and molybdenum
    Patent number: 4536232
    Abstract: Cast iron alloy preferably of about 1.6 carbon, 2 nickel, 2 molybdenum, 28 chromium, and up to 1 of an additional element, balance substantially iron characterized by a matrix substantially entirely of tempered martensite with minimal retained austenite, containing ferrite phases and primary chromium-rich carbides with substantially no secondary carbides.
    Type: Grant
    Filed: November 10, 1983
    Date of Patent: August 20, 1985
    Assignee: Abex Corporation
    Inventors: Igor Y. Khandros, Hugo R. Larson
  • Cast iron railroad brake shoes
    Patent number: 4352416
    Abstract: A cast iron railroad brake shoe containing more than 2% phosphorus with sulfur and manganese present in the ratio of weight % sulfur>weight % manganese/1.8; the amount of sulfur in excess of weight % Mn/1.8 accounts for increased wear resistance in proportion to said excess.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: October 5, 1982
    Assignee: Abex Corp.
    Inventors: Hugo R. Larson, Chandi P. Biswas
  • Castings
    Patent number: 4342593
    Abstract: Ferrous metal casting of manganese steel susceptible to austenization to develop minimum yield strength of about 75,000 psi and elongation of about 30% min. consisting essentially of:C--0.85Mn--14Si--0.6Cr--4Ni--3.6V--0.4balance essentially iron except for impurities.
    Type: Grant
    Filed: September 15, 1980
    Date of Patent: August 3, 1982
    Assignee: Abex Corporation
    Inventors: Hugo R. Larson, Howard S. Avery, Henry J. Chapin
  • Consumable guide tube assembly
    Patent number: 4129773
    Abstract: A consumable assembly consituting the source of metal for welding by the electroslag process, comprising a stainless steel guide sleeve, a tube of copper inside the guide sleeve, and a weld wire inside the copper tube.
    Type: Grant
    Filed: March 28, 1977
    Date of Patent: December 12, 1978
    Assignee: Abex Corporation
    Inventors: Charles E. Ridenour, Herman A. Fabert, Jr., John Tasker, Hugo R. Larson
  • Welding manganese steel
    Patent number: 4104504
    Abstract: Sections of cast manganese steel, or manganese steel to be interfaced to another steel, are joined by electroslag welding. Metallurgical limitations, operating parameters and physical attributes of the guide tube are imposed to retard embrittlement of the base metal and weld metal as well, to prevent tearing, to assure satisfactory ductility, and to preserve the integrity of the austenitic manganese steel in the weld metal.
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: August 1, 1978
    Assignee: Abex Corporation
    Inventors: Charles E. Ridenour, Herman A. Fabert, Jr., John Tasker, Hugo R. Larson