Patents by Inventor John COTTRILL

John COTTRILL 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).

  • Electrochemical machining employing electrical voltage pulses to drive reduction and oxidation reactions
    Patent number: 10487416
    Abstract: Electrochemical machining of parts employs electric or voltage pulses in which current flows in a first direction and a second direction opposite from the first direction. The cathodic/anodic pulses switch between bulk machining and oxide removal pushing bulk material removal into a homogenous regime to obtain a smooth surface finish and appropriate form control during the electrochemical machining process compared to electrochemical machining employing an electric or voltage potential in which current flows in only one direction.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: November 26, 2019
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Andrew Lee Trimmer, John Cottrill, Douglas Lewis
  • ELECTROCHEMICAL MACHINING EMPLOYING ELECTRICAL VOLTAGE PULSES TO DRIVE REDUCTION AND OXIDATION REACTIONS
    Publication number: 20160362810
    Abstract: Electrochemical machining of parts employs electric or voltage pulses in which current flows in a first direction and a second direction opposite from the first direction. The cathodic/anodic pulses switch between bulk machining and oxide removal pushing bulk material removal into a homogenous regime to obtain a smooth surface finish and appropriate form control during the electrochemical machining process compared to electrochemical machining employing an electric or voltage potential in which current flows in only one direction.
    Type: Application
    Filed: June 15, 2015
    Publication date: December 15, 2016
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Andrew Lee TRIMMER, John COTTRILL, Douglas LEWIS