Patents by Inventor Mark G. Rettig

Mark G. Rettig 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).

  • Publication number: 20010046596
    Abstract: An article comprising a substrate and an outer metallic layer, such as a coating, is provided with augmented heat transfer from the substrate through the combination of a layer thickness of about 0.003″ to about 0.017″, a layer surface roughness of at least about 500 micro inches Ra, a layer tensile bond strength of at least about 5 ksi, and a heat transfer augmentation of at least about 1.1. A method of making the article uses an electric arc wire thermal spray process in which the atomizing gas pressure is maintained within the range of about 20-80 psi.
    Type: Application
    Filed: May 15, 2001
    Publication date: November 29, 2001
    Inventors: Mark G. Rettig, Gilbert Farmer, Thomas J. Tomlinson, Robert G. Zimmerman, Bhupendra K. Gupta
  • Patent number: 6286302
    Abstract: A combustion apparatus for a gas turbine engine including a combustor structure having at least one combustion chamber, a dual cone fuel nozzle for injecting both fuel and water to the combustion chamber, and a swirl cup package upstream of and adjacent to the combustion chamber. The swirl cup package further includes a swirler and a venturi extending between the nozzle and the combustion chamber for mixing the fuel and water with air. The venturi is configured to have a non-uniform thickness from an upstream end to a downstream end resulting in a cross-sectional area which provides a heat transfer conduction path that reduces axial stresses imposed on the venturi when water impinges on an upstream portion of the venturi.
    Type: Grant
    Filed: April 1, 1999
    Date of Patent: September 11, 2001
    Assignee: General Electric Company
    Inventors: Gilbert Farmer, James A. Groeschen, Mark G. Rettig
  • Patent number: 6254997
    Abstract: An article comprising a substrate and an outer metallic layer, such as a coating, is provided with augmented heat transfer from the substrate through the combination of a layer thickness of about 0.003″ to about 0.017″, a layer surface roughness of at least about 500 micro inches Ra, a layer tensile bond strength of at least about 5 ksi, and a heat transfer augmentation of at least about 1.1. A method of making the article uses an electric arc wire thermal spray process in which the atomizing gas pressure is maintained within the range of about 20-80 psi.
    Type: Grant
    Filed: December 16, 1998
    Date of Patent: July 3, 2001
    Assignee: General Electric Company
    Inventors: Mark G. Rettig, Gilbert Farmer, Thomas J. Tomlinson, Robert G. Zimmerman, Jr., Bhupendra K. Gupta
  • Patent number: 6205789
    Abstract: Multi-hole film cooling of combustor liners is enhanced by providing clustered groups of cooling holes in areas of the liners that would otherwise experience a loss of cooling film effectiveness. The combustor liner is made up of a shell having first and second groups of cooling holes formed therein. The cooling holes of the second group are more closely spaced than the cooling holes of the first group. The second group of cooling holes is located on an area of the shell where the cooling film effectiveness is degraded. Preferred locations include a region of the shell that is subjected to swirl impingement and a spot immediately downstream of a large opening in the shell such as a dilution hole, a borescope hole or an igniter port hole.
    Type: Grant
    Filed: November 13, 1998
    Date of Patent: March 27, 2001
    Assignee: General Electric Company
    Inventors: David B. Patterson, Beverly S. Duncan, Mark G. Rettig, James E. Thompson, Glenn E. Wiehe