Patents by Inventor Donnell Eugene Crear

Donnell Eugene Crear 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: 20170182594
    Abstract: A metal powder additive manufacturing system and method are disclosed that use increased trace amounts of oxygen to improve physical attributes of an object. The system may include: a processing chamber; a metal powder bed within the processing chamber; a melting element configured to sequentially melt layers of metal powder on the metal powder bed to generate an object; and a control system configured to control a flow of a gas mixture within the processing chamber from a source of inert gas and a source of an oxygen containing material, the gas mixture including the inert gas and oxygen from the oxygen containing material. The method may result in an object having a surface porosity of no greater than approximately 0.1%, and an effective density of greater than approximately 99.9%.
    Type: Application
    Filed: February 10, 2016
    Publication date: June 29, 2017
    Inventors: Donnell Eugene Crear, Chad Joseph Dulkiewicz, Archie Lee Swanner, JR.
  • Publication number: 20130316081
    Abstract: A system and method for three-dimensional printing are provided. One three-dimensional printing system includes a first printing surface configured to hold a first three-dimensional object. The three-dimensional printing system also includes a second printing surface configured to hold a second three-dimensional object. The three-dimensional printing system includes at least one printing head disposed adjacent to the first and second printing surfaces for printing the first and second three-dimensional objects. A vertical position of the first printing surface is controlled independently from a vertical position of the second printing surface.
    Type: Application
    Filed: May 22, 2012
    Publication date: November 28, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Michael Andrew Kovalcik, Eric Alan Estill, Donnell Eugene Crear
  • Patent number: 8448611
    Abstract: A detonation device cleaning system includes a vessel having a main body including an outer surface and an inner surface that collectively define an interior chamber. A detonation combustor cleaning device is mounted to the vessel. The detonation combustor cleaning device includes at least one combustion chamber that defines a combustion flow path. The at least one combustion chamber includes a deflection member arranged along the combustion flow path. An ignition device is operatively connected to the at least one combustion chamber. The ignition device is selectively activated to ignite fuel within the at least one combustion chamber to produce a shockwave that moves in a first direction along the combustion flow path, is redirected back along the flow path within the at least one combustion chamber, and passes into the interior chamber to dislodge particles clinging to the inner surface of the vessel.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: May 28, 2013
    Assignee: General Electric Company
    Inventors: Anthony John Dean, David Michael Chapin, Donnell Eugene Crear
  • Publication number: 20110256487
    Abstract: A detonation device cleaning system includes a vessel having a main body including an outer surface and an inner surface that collectively define an interior chamber. A detonation combustor cleaning device is mounted to the vessel. The detonation combustor cleaning device includes at least one combustion chamber that defines a combustion flow path. The at least one combustion chamber includes a deflection member arranged along the combustion flow path. An ignition device is operatively connected to the at least one combustion chamber. The ignition device is selectively activated to ignite fuel within the at least one combustion chamber to produce a shockwave that moves in a first direction along the combustion flow path, is redirected back along the flow path within the at least one combustion chamber, and passes into the interior chamber to dislodge particles clinging to the inner surface of the vessel.
    Type: Application
    Filed: June 24, 2011
    Publication date: October 20, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Anthony John Dean, David Michael Chapin, Donnell Eugene Crear
  • Patent number: 7987821
    Abstract: A detonation combustor cleaning device includes at least one combustion chamber having combustion flow path and including a deflection member. An ignition device is operatively connected to the at least one combustion chamber is selectively activated to ignite a combustible fuel within the at least one combustion chamber to produce a shockwave that moves in a first direction along the combustion flow path, impacts the deflection member, reverses direction and passes into a vessel to dislodge particles clinging to inner surfaces thereof.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: August 2, 2011
    Assignee: General Electric Company
    Inventors: Anthony John Dean, David Michael Chapin, Donnell Eugene Crear
  • Publication number: 20090293817
    Abstract: A detonation combustor cleaning device includes at least one combustion chamber having combustion flow path and including a deflection member. An ignition device is operatively connected to the at least one combustion chamber is selectively activated to ignite a combustible fuel within the at least one combustion chamber to produce a shockwave that moves in a first direction along the combustion flow path, impacts the deflection member, reverses direction and passes into a vessel to dislodge particles clinging to inner surfaces thereof.
    Type: Application
    Filed: May 30, 2008
    Publication date: December 3, 2009
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Anthony John Dean, David Michael Chapin, Donnell Eugene Crear