Patents by Inventor Curt H. Liebert

Curt H. Liebert 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).

  • Dual active surface, miniature, plug-type heat flux gauge
    Patent number: 5314247
    Abstract: A plug-type heat flux gauge can simultaneously measure heat flux on two opposite surfaces of thick or very thin convection or impingement cooled metal walls. The gauge is capable of continuously measuring transient and steady heat flux under transient and steady state gauge temperature operating conditions. The length of the gauge extends through the entire thickness of the material. A non-linear temperature gradient through the gauge can be measured by attaching 3-5 thermocouples along the length of the gauge.
    Type: Grant
    Filed: April 16, 1993
    Date of Patent: May 24, 1994
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics & Space Administration
    Inventors: Curt H. Liebert, John Koch, Jr.
  • Method of producing a plug-type heat flux gauge
    Patent number: 5086204
    Abstract: A method of making a plug-type heat flux gauge in a material specimen in which a thermoplug is integrally formed. The thermoplug and concentric annulus are formed in the material specimen by electrical discharge machining and trepanning procedures. The thermoplug is surrounded by a concentric annulus through which thermocouple wires are routed. The end of each thermocouple wire is welded to the thermoplug, with each thermocouple wire welded at a different location along the length of the thermoplug.
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: February 4, 1992
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Curt H. Liebert, John Koch, Jr.
  • Plug-type heat flux gauge
    Patent number: 5048973
    Abstract: A plug-type heat flux gauge formed in a material specimen and having a thermoplug integrally formed in the material specimen, and a method for making the same. The thermoplug is surrounded by a concentric annulus, through which thermocouple wires are routed. The end of each thermocouple wire is welded to the thermoplug, with each thermocouple wire welded at a different location along the length of the thermoplug. The thermoplug and concentric annulus may be formed in the material specimen by electrical discharge machining and trepanning procedures.
    Type: Grant
    Filed: May 31, 1990
    Date of Patent: September 17, 1991
    Assignee: United States of America, as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Curt H. Liebert, John Koch, Jr.
  • Covering solid, film cooled surfaces with a duplex thermal barrier coating
    Patent number: 4402992
    Abstract: This invention is directed to applying thermal barrier coating systems to hardware having passageways in the walls connecting apertures in the surface to a gas supply for film cooling. An inert gas, such as argon, is discharged through the apertures during the application of the thermal barrier coating system by plasma spraying. This flow of inert gas reduces both blocking of the holes and base metal oxidation during the coating operation.
    Type: Grant
    Filed: December 7, 1981
    Date of Patent: September 6, 1983
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventor: Curt H. Liebert