Patents by Inventor Terence Walker

Terence Walker 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: 20080063582
    Abstract: Method for production of iron carbide while removing tar-forming hydrocarbons from effluent gas mixtures from Chemical Vapor Deposition or Chemical Vapor Infiltration processes. Method includes passing effluent gas mixture containing hydrogen, methane, and high molecular weight hydrocarbons through a bed that contains iron pellets at elevated temperature, thereby decomposing tar-forming high molecular weight hydrocarbons in the effluent gas mixture and forming iron carbide. The process can be used to clean up effluent streams and/or for carbon sequestration. Apparatus including a de-tarring vessel (5) having a packed bed (7, 8, 9) of iron or iron oxide pellets (1) resting over a perforated distributor plate (2) and having an exhaust port (12), the de-tarring vessel being operatively linked via an exhaust port (6) to a CVI or CVD reactor vessel.
    Type: Application
    Filed: September 17, 2007
    Publication date: March 13, 2008
    Inventors: Terence Walker, Craig Shumaker
  • Publication number: 20070262200
    Abstract: The present invention pertains to carbon-carbon composites what are reinforced with PAN-based carbon fibers and which have an all pyrocarbon matrix deposited via chemical vapor infiltration and/or chemical vapor deposition. The uniquely low wear life of the C—C composites of this invention is achieved via a high initial heat treatment of the preforms made from PAN-based carbon fibers—providing a high modulus to the fibers, making them less abrasive—followed by CVI/CVD of the pyrocarbon matrix. No final heat treatment is needed to achieve the balance of hardness in the fiber and matrix. The composites of the present invention do not have pitch-based fibers or matrices nor do they have resin-based matrices.
    Type: Application
    Filed: May 15, 2006
    Publication date: November 15, 2007
    Inventors: Akshay Waghray, Allan Blunt, Terence Walker
  • Publication number: 20070193836
    Abstract: A method and a brake disc with a composite insert member is disclosed. The method discloses the coupling of a carbon-carbon composite insert member with the brake disc to provide an interface for the brake disc.
    Type: Application
    Filed: February 23, 2006
    Publication date: August 23, 2007
    Inventors: Terence Walker, Darrell Johnson, Laurie Booker
  • Publication number: 20070175710
    Abstract: A method and brake disc assembly to utilize worn refurbished brake material is disclosed. The method discloses the use of a brake disc for braking and the subsequent machining or refurbishment of the brake disc so that the brake disc can be used for three tours of braking to increase the utilization of the brake material.
    Type: Application
    Filed: February 1, 2006
    Publication date: August 2, 2007
    Inventors: Terence Walker, Akshay Waghray
  • Publication number: 20060108182
    Abstract: Apparatus including a carbon-carbon composite pressure plate (32, 42) having a friction surface (33, 43) on one side thereof, a non-friction surface (37, 47) on the opposite side thereof, and a body (39, 49) between said surfaces. A wear pin housing (36, 46) containing a wear pin retainer (35, 45) is located in the pressure plate body (39, 49), the wear pin housing opening to the non-friction surface (37, 47) but not opening to the friction surface (33, 43). A wear pin (31), preferably made of carbon-carbon composite material, is located in the wear pin retainer (35, 45). The wear pin retainer (35, 45), which may be made of carbon-carbon composite material, is held in place in the wear pin housing (36, 46) by the interaction of threading in the wear pin housing (36, 36) and threading in the wear pin retainer (35, 45) and optionally also by a carbonizable resin adhesive located between the wear pin housing threading and the wear pin retainer threading.
    Type: Application
    Filed: November 19, 2004
    Publication date: May 25, 2006
    Inventors: Terence Walker, Akshay Waghray, Laurie Booker
  • Publication number: 20060008647
    Abstract: Method of improving humidity resistance in a coated article (19) comprising a carbon-carbon composite component (10), a graphite component (10), or a ceramic matrix composite component based on carbon fibers and/or graphite (10). The component (10) is preferably configured as an aircraft landing system brake disc. The method includes the steps of: (A) providing a carbon-carbon composite component (10), a graphite component (10), or a ceramic matrix composite component based on carbon fibers and/or graphite (10); (B) covering the component (10) with a phosphorus-containing antioxidant undercoating (11) having a thickness of approximately 1-10 mil; and (C) covering the resulting undercoated component (10, 11) with a boron-containing glass overcoating (12) having a thickness of approximately 1-10 mil. The overcoating includes 20-50 wt-% alkali or alkaline earth metal silicates, 3-25 wt-% alkali metal hydroxide, up to 10 wt-% boron nitride, and one or both of 5-40 wt-% elemental boron and 5-40 wt-% boron carbide.
    Type: Application
    Filed: July 6, 2004
    Publication date: January 12, 2006
    Inventors: Terence Walker, Manuel Koucouthakis, Michelle Shreve, Laurie Booker
  • Publication number: 20050238564
    Abstract: Method for removing tar-forming hydrocarbons from an effluent gas mixtures from Chemical Vapor Deposition or Chemical Vapor Infiltration processes. Method includes passing at elevated temperature effluent gas mixture containing hydrogen, methane, and high molecular weight hydrocarbons through a bed that contains iron pellets, thereby decomposing tar-forming high molecular weight hydrocarbons in the effluent gas mixture. Apparatus including a de-tarring vessel (5) having a packed bed (7, 8, 9) of iron or iron oxide pellets (1) resting over a perforated distributor plate (2) and having an exhaust port (12), said de-tarring vessel being operatively linked via an exhaust port (6) to a CVI or CVD reactor vessel.
    Type: Application
    Filed: April 27, 2004
    Publication date: October 27, 2005
    Inventors: Terence Walker, Craig Shumaker
  • Publication number: 20050170182
    Abstract: Coated articles (19) that comprise components, made of carbon fiber or carbon-carbon composites which may be configured, for example, as aircraft landing system brake discs. The components (10) are coated with a system that includes a phosphorus-containing undercoating (11) having a specified formulation and a boron-containing overcoating (12) having specified characteristics. The coated articles of the invention, e.g., aircraft brake discs, are protected against catalytic oxidation when the article is subjected to temperatures of 800° C. (1472° F.) or greater. Also, a method of protecting a component made of a carbon fiber or carbon-carbon composite simultaneously against catalytic oxidation (e.g., catalyzed by de-icer compositions) and high temperature non-catalytic oxidation.
    Type: Application
    Filed: February 4, 2005
    Publication date: August 4, 2005
    Inventors: Terence Walker, Ilan Golecki, Laurie Booker
  • Patent number: 4236820
    Abstract: A mechanism for carrying a calibration standard and receiving a cuvette containing a blood sample to be tested is disclosed. The mechanism permits convenient shifting to either the test position or calibration position.
    Type: Grant
    Filed: February 12, 1979
    Date of Patent: December 2, 1980
    Assignee: American Optical Corporation
    Inventor: Terence Walker
  • Patent number: 3947122
    Abstract: An Oximeter Cuvette having a complimentary cover with a stirrer that extends into the cuvette cavity and which is rotated relative to the cuvette by the oximeter unit is particularly advantageous to permit a plurality of samples to be evaluated rapidly.
    Type: Grant
    Filed: December 16, 1974
    Date of Patent: March 30, 1976
    Assignee: American Optical Corporation
    Inventor: Terence Walker