Patents by Inventor Harry Chohan

Harry Chohan 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).

  • Gas turbine induction system, corresponding induction heater and method for inductively heating a component
    Patent number: 11371377
    Abstract: An induction heater is employed with a gas turbine engine in order to heat a static component of the gas turbine engine. The heating of the static component is performed such that the clearance space between the static component and a rotating component remains constant during steady state conditions and transient conditions.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: June 28, 2022
    Assignee: SIEMENS ENERGY GLOBAL GMBH & CO. KG
    Inventors: Harry Chohan, Sébastien Bouffard, Alexandre Malo, Hayden Smith
  • Gas turbine engine induction system, corresponding induction heater and method for inductively heating a component
    Patent number: 11268403
    Abstract: An induction heater is employed with a gas turbine engine in order to heat a static component of the gas turbine engine. The heating of the static component is performed prior to the ignition of the gas turbine engine and during transient conditions. This minimizes thermal differences between the components of the gas turbine engine during transient conditions to thereby increase the life span of the components.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: March 8, 2022
    Assignee: Siemens Energy Global GmbH & Co. KG
    Inventors: Harry Chohan, Sébastien Bouffard, Alexandre Malo, Hayden Smith
  • INDUCTION HEATING WITH A FLEXIBLE HEATING JACKET, FOR ASSEMBLY OR DISASSEMBLY OF COMPONENTS IN A TURBINE ENGINE
    Publication number: 20210362279
    Abstract: A first component, such as a hub of a gas turbine engine is assembled or disassembled from a second component, such as a shaft by induction heating, using a flexible heating jacket that is wrapped about an outer circumferential surface of the hub. The jacket includes an electrically conductive, flexible cable, having a plurality of loops. The jacket is selectively opened and closed with a plurality of electrical connectors coupled to each respective loop of the cable. A power source passes current through the respective cable loops, which heats the hub. The induction heating is applied to the mating components in the engine, in order to create a sufficient temperature differential that permits assembly or disassembly of the hub and shaft. A controller regulates power applied to the hub and shaft and monitors their temperature with temperature sensors.
    Type: Application
    Filed: October 5, 2018
    Publication date: November 25, 2021
    Inventor: Harry Chohan
  • GAS TURBINE ENGINE INDUCTION SYSTEM, CORRESPONDING INDUCTION HEATER AND METHOD FOR INDUCTIVELY HEATING A COMPONENT
    Publication number: 20210189906
    Abstract: An induction heater is employed with a gas turbine engine in order to heat a static component of the gas turbine engine. The heating of the static component is performed prior to the ignition of the gas turbine engine and during transient conditions. This minimizes thermal differences between the components of the gas turbine engine during transient conditions to thereby increase the life span of the components.
    Type: Application
    Filed: January 5, 2018
    Publication date: June 24, 2021
    Inventors: Harry Chohan, Sébastien Bouffard, Alexandre Malo, Hayden Smith
  • GAS TURBINE INDUCTION SYSTEM, CORRESPONDING INDUCTION HEATER AND METHOD FOR INDUCTIVELY HEATING A COMPONENT
    Publication number: 20200400035
    Abstract: An induction heater is employed with a gas turbine engine in order to heat a static component of the gas turbine engine. The heating of the static component is performed such that the clearance space between the static component and a rotating component remains constant during steady state conditions and transient conditions.
    Type: Application
    Filed: January 5, 2018
    Publication date: December 24, 2020
    Inventors: Harry Chohan, Sébastien Bouffard, Alexandre Malo, Hayden Smith