Patents by Inventor Harrison A. Garner, Jr.

Harrison A. Garner, Jr. 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).

  • High-hardness powder metallurgy tool steel and article made therefrom
    Patent number: 6482354
    Abstract: A tool steel alloy having a unique combination of hardness and toughness is disclosed. The alloy contains, in weight percent, about: wt. % C 1.85-2.30, Mn 0.15-1.0, Si 0.15-1.0, P 0.030 max., S 0-0.30, Cr 3.7-5.0, Ni+Cu 0.75 max., Mo 1.0 max., Co 6-12, W 12.0-13.5, V 4.5-7.5. The balance is essentially iron and usual impurities. The elements C, Cr, Mo, W, and V are balanced in this alloy such that −0.05≦&Dgr;C≦−0.42 where &Dgr;C=((0.033W)+(0.063Mo)+(0.06Cr)+(0.2V))−C. A powder metallurgy tool steel article made from consolidated alloy powder having the aforesaid weight percent composition provides a Rockwell C hardness of at least about 69.5 when heat treated.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: November 19, 2002
    Assignee: CRS Holdings, Inc.
    Inventors: David E. Wert, Gregory J. Del Corso, Harrison A. Garner, Jr.
  • Hot work tool steel with good temper resistance
    Patent number: 4886640
    Abstract: An improved hot work tool steel has higher hardness capability and better temper resistance above 1100 F. and better wear resistance than AISI type H13 and better toughness and ductility then AISI type H10 or type H21. The steel alloy contains essentially the following in weight percent:______________________________________ Carbon 0.55 Max. Manganese 1.5 Max. Silicon 2.0 Max. Chromium 3.5-6.0 Molybdenum 1.5-3.0 Vanadium 0.50-1.50 ______________________________________and the balance is essentially iron except for the usual impurities found in commerical grades of hot work tool steels. Carbon and chromium are balanced within the composition such that% carbon.gtoreq.0.098.times.% chromium.
    Type: Grant
    Filed: August 22, 1988
    Date of Patent: December 12, 1989
    Assignee: Carpenter Technology Corporation
    Inventors: Harrison A. Garner, Jr., Raymond M. Hemphill, John F. McGraw, Michael L. Schmidt, Bruce A. Smith, David E. Wert