Patents by Inventor Shivaram Ac

Shivaram Ac 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: 20210102473
    Abstract: A variable inlet guide vane assembly (200) and methods of operating the variable inlet guide vane assembly (200) are disclosed. The variable inlet guide vane assembly (200) includes an inlet guide vane (210) and an actuator (220). The actuator (220) is at least partially embedded in the inlet guide vane (210) and is configured to change an angle of the inlet guide vane (210) relative to a gas flow. The actuator (220) includes a shape memory alloy. The methods of operating the variable inlet guide vane assembly (200) include modulating the shape memory alloy by transferring thermal energy between the actuator (220) and a fluid, and actuating the inlet guide vane (210) to change an angle of the inlet guide vane (210) relative to gas flow.
    Type: Application
    Filed: April 6, 2018
    Publication date: April 8, 2021
    Inventor: Shivaram AC
  • Patent number: 10823228
    Abstract: A hybrid bearing support system includes a shaft extension fixedly coupled to a rotatable member at a radial inner end of the shaft extension, a radial outer end of the shaft extension fixedly coupled to a rotatable race of a bearing supporting the rotatable member, and a recoupler device formed of a shape memory alloy (SMA) material coupled in parallel with at least a portion of the shaft extension between the radial inner end and the radial outer end.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: November 3, 2020
    Assignee: General Electric Company
    Inventors: Ravindra Shankar Ganiger, Shuvajyoti Ghosh, Shivaram Ac, Akash Joshi, Vidya Lokammanahalli Shivashankar
  • Patent number: 10724400
    Abstract: A support assembly for a load-bearing unit, a gas turbine engine including the support assembly, and a method of operation of the support assembly are provided. The support assembly includes a support element, a damper, and a variable stiffness member. The support element supports the load-bearing unit. The damper supports the support element and is configured to provide dampening of the load-bearing unit. The variable stiffness member is positioned between the damper and the load-bearing unit. The variable stiffness member is configured to provide a serial dampening of the load-bearing unit with the damper. The variable stiffness member includes a shape memory alloy.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: July 28, 2020
    Assignee: General Electric Company
    Inventors: Shivaram Ac, Vidyashankar Ramasastry Buravalla, Ravindra Shankar Ganiger, Shuvajyoti Ghosh, Akash Joshi
  • Patent number: 10626846
    Abstract: A wind turbine blade includes a first blade segment and a second blade segment extending in opposite directions from a chord-wise joint. Each of the blade segments having a pressure side shell member, a suction side shell member. The blade further including a coupling component extending spanwise and structurally connecting the first blade segment and the second blade segment. A thermal actuation component is coupled to the coupling component and passively actuated in response to a change in thermal conditions so as to provide for aeroelastic tailoring and pitch control to the wind turbine blade.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: April 21, 2020
    Assignee: General Electric Company
    Inventors: Andreas Herrig, Dominic Alexander von Terzi, Shivaram Ac, Vidyashankar Ramasastry Buravalla, Norman Arnold Turnquist
  • Patent number: 10584751
    Abstract: A load reduction assembly includes an annular bearing cone configured to extend between a bearing assembly and a frame assembly and form a first load path therebetween. The load reduction assembly further includes an annular recoupler member configured to extend between the bearing assembly and the frame assembly and form a second load path therebetween. The second load path is parallel to the first load path. The recoupler member includes a shape memory alloy configured to change stiffness in response to a change in a stress condition, thereby regulating an imbalance condition of a rotor shaft coupled to the bearing assembly.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: March 10, 2020
    Assignee: General Electric Company
    Inventors: Shuvajyoti Ghosh, Akash Joshi, Shivaram AC, Ravindra Shankar Ganiger, Praveen Sharma
  • Publication number: 20200025254
    Abstract: A method of reducing loads in a rotor assembly during an imbalance condition, a shape memory alloy recoupler device, and a hybrid bearing support system are provided. The hybrid bearing support system includes a shaft extension fixedly coupled to a rotatable member at a radially inner end of the shaft extension, a radially outer end of said shaft extension fixedly coupled to a rotatable race of a bearing supporting the rotatable member, and a recoupler device formed of a shape memory alloy (SMA) material coupled in parallel with at least a portion of said shaft extension between the radially inner end and the radially outer end.
    Type: Application
    Filed: April 25, 2019
    Publication date: January 23, 2020
    Inventors: Ravindra Shankar Ganiger, Shuvajyoti Ghosh, Shivaram AC, Akash Joshi, Vidya Lokammanahalli Shivashankar
  • Publication number: 20190178104
    Abstract: A gas turbine engine includes a compressor section and a turbine section arranged in serial flow order. A shaft is provided rotatable with at least a portion of the compressor section and with at least a portion of the turbine section. A bearing is also provided supporting rotation of the shaft, with a support element in turn supporting the bearing. The gas turbine engine also includes a superelastic member formed of a shape memory alloy supporting at least one of the support element or the bearing. The superelastic member is installed in a pre-stressed condition to enhance a dampening function of the superelastic member.
    Type: Application
    Filed: May 23, 2017
    Publication date: June 13, 2019
    Inventors: Akash Joshi, Ravindra Shankar Ganiger, Vidyashankar Ramasastry Buravalla, Shuvajyoti Ghosh, Shivaram AC
  • Publication number: 20190128329
    Abstract: A load reduction assembly includes an annular bearing cone configured to extend between a bearing assembly and a frame assembly and form a first load path therebetween. The load reduction assembly further includes an annular recoupler member configured to extend between the bearing assembly and the frame assembly and form a second load path therebetween. The second load path is parallel to the first load path. The recoupler member includes a shape memory alloy configured to change stiffness in response to a change in a stress condition, thereby regulating an imbalance condition of a rotor shaft coupled to the bearing assembly.
    Type: Application
    Filed: December 19, 2018
    Publication date: May 2, 2019
    Inventors: Shuvajyoti Ghosh, Akash Joshi, Shivaram AC, Ravindra Shankar Ganiger, Praveen Sharma
  • Patent number: 10274017
    Abstract: A method of reducing loads in a rotor assembly during an imbalance condition, a shape memory alloy recoupler device, and a hybrid bearing support system are provided. The hybrid bearing support system includes a shaft extension fixedly coupled to a rotatable member at a radially inner end of the shaft extension, a radially outer end of the shaft extension fixedly coupled to a rotatable race of a bearing supporting the rotatable member, and a recoupler device formed of a shape memory alloy (SMA) material coupled in parallel with at least a portion of the shaft extension between the radially inner end and the radially outer end.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: April 30, 2019
    Assignee: General Electric Company
    Inventors: Ravindra Shankar Ganiger, Shuvajyoti Ghosh, Shivaram AC, Akash Joshi, Vidya Lokammanahalli Shivashankar
  • Patent number: 10197102
    Abstract: A load reduction assembly includes an annular bearing cone configured to extend between a bearing assembly and a frame assembly and form a first load path therebetween. The load reduction assembly further includes an annular recoupler member configured to extend between the bearing assembly and the frame assembly and form a second load path therebetween. The second load path is parallel to the first load path. The recoupler member includes a shape memory alloy configured to change stiffness in response to a change in a stress condition, thereby regulating an imbalance condition of a rotor shaft coupled to the bearing assembly.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: February 5, 2019
    Assignee: General Electric Company
    Inventors: Shuvajyoti Ghosh, Akash Joshi, Shivaram Ac, Ravindra Shankar Ganiger, Praveen Sharma
  • Patent number: 10196934
    Abstract: A rotor support system for a gas turbine engine may generally include a bearing assembly and a load reduction member configured to be coupled between the bearing assembly and a support frame of the engine. The load reduction member may include a fuse portion configured to fail when a load transmitted through the load reduction member exceeds a predetermined load threshold. The system may also include a load recoupling member provided between the bearing assembly and the support frame. The load recoupling member may be formed from a super-elastic shape memory alloy that allows the load recoupling member to undergo recoverable deformation without failing when the fuse portion fails such that the load recoupling member maintains a mechanical connection between the bearing assembly and the support frame.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: February 5, 2019
    Assignee: General Electric Company
    Inventors: Esuff Khan, Shivaram Ac, Vidyashankar Ramasastry Buravalla, Shuvajyoti Ghosh, Akash Joshi
  • Publication number: 20180298822
    Abstract: A support assembly for a load-bearing unit, a gas turbine engine including the support assembly, and a method of operation of the support assembly are provided. The support assembly includes a support element, a damper, and a variable stiffness member. The support element supports the load-bearing unit. The damper supports the support element and is configured to provide dampening of the load-bearing unit. The variable stiffness member is positioned between the damper and the load-bearing unit. The variable stiffness member is configured to provide a serial dampening of the load-bearing unit with the damper. The variable stiffness member includes a shape memory alloy.
    Type: Application
    Filed: April 10, 2018
    Publication date: October 18, 2018
    Inventors: Shivaram AC, Vidyashankar Ramasastry BURAVALLA, Ravindra Shankar GANIGER, Shuvajyoti GHOSH, Akash JOSHI
  • Publication number: 20180135596
    Abstract: A wind turbine blade includes a first blade segment and a second blade segment extending in opposite directions from a chord-wise joint. Each of the blade segments having a pressure side shell member, a suction side shell member. The blade further including a coupling component extending spanwise and structurally connecting the first blade segment and the second blade segment. A thermal actuation component is coupled to the coupling component and passively actuated in response to a change in thermal conditions so as to provide for aeroelastic tailoring and pitch control to the wind turbine blade.
    Type: Application
    Filed: November 17, 2016
    Publication date: May 17, 2018
    Inventors: Andreas Herrig, Dominic Alexander von Terzi, Shivaram AC, Vidyashankar Ramasastry Buravalla, Norman Arnold Turnquist
  • Publication number: 20180112554
    Abstract: A load reduction assembly includes an annular bearing cone configured to extend between a bearing assembly and a frame assembly and form a first load path therebetween. The load reduction assembly further includes an annular recoupler member configured to extend between the bearing assembly and the frame assembly and form a second load path therebetween. The second load path is parallel to the first load path. The recoupler member includes a shape memory alloy configured to change stiffness in response to a change in a stress condition, thereby regulating an imbalance condition of a rotor shaft coupled to the bearing assembly.
    Type: Application
    Filed: October 21, 2016
    Publication date: April 26, 2018
    Inventors: Shuvajyoti Ghosh, Akash Joshi, Shivaram AC, Ravindra Shankar Ganiger, Praveen Sharma
  • Publication number: 20180112672
    Abstract: A method of reducing loads in a rotor assembly during an imbalance condition, a shape memory alloy recoupler device, and a hybrid bearing support system are provided. The hybrid bearing support system includes a shaft extension fixedly coupled to a rotatable member at a radially inner end of the shaft extension, a radially outer end of said shaft extension fixedly coupled to a rotatable race of a bearing supporting the rotatable member, and a recoupler device formed of a shape memory alloy (SMA) material coupled in parallel with at least a portion of said shaft extension between the radially inner end and the radially outer end.
    Type: Application
    Filed: October 21, 2016
    Publication date: April 26, 2018
    Inventors: Ravindra Shankar Ganiger, Shuvajyoti Ghosh, Shivaram AC, Akash Joshi, Vidya Lokammanahalli Shivashankar
  • Patent number: 9822551
    Abstract: A device for cycling a component between a first condition and a second condition includes an element and a reset apparatus connected to and driven by the element. The element is formed from a shape memory alloy, wherein the alloy is transitionable between a martensite crystallographic phase and an austenite crystallographic phase in response to a thermal energy source. The apparatus is actuatable by the element from an initial state in which the alloy has the martensite phase and the component is in the first condition, to an actuated state in which the alloy has the austenite phase and the component is in the second condition. The apparatus is resettable from the actuated state to a reset state in which the alloy transitions from the austenite to the martensite phase while the component is in the first condition, and further resettable from the reset state to the initial state.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: November 21, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Shivaram Ac, Vidyashankar R. Buravalla, Paul W. Alexander
  • Publication number: 20170234157
    Abstract: A rotor support system for a gas turbine engine may generally include a bearing assembly and a load reduction member configured to be coupled between the bearing assembly and a support frame of the engine. The load reduction member may include a fuse portion configured to fail when a load transmitted through the load reduction member exceeds a predetermined load threshold. The system may also include a load recoupling member provided between the bearing assembly and the support frame. The load recoupling member may be formed from a super-elastic shape memory alloy that allows the load recoupling member to undergo recoverable deformation without failing when the fuse portion fails such that the load recoupling member maintains a mechanical connection between the bearing assembly and the support frame.
    Type: Application
    Filed: February 11, 2016
    Publication date: August 17, 2017
    Inventors: Esuff Khan, Shivaram Ac, Vidyashankar Ramasastry Buravalla, Shuvajyoti Ghosh, Akash Joshi
  • Patent number: 9334905
    Abstract: A clutch for selective transmission of torque and power, utilizing pairs of coded arrays of permanent magnets affixed respectively to the driving member and the driven member. A shape memory alloy actuator brings to driving member and the driven member into proximity to engage the clutch via a higher-order mutual magnetic correspondence between the coded magnetic regions of the permanent magnet arrays. Also provided is a clutch having a magnetorheological fluid between the driving member and the driven member, to increase the torque and power transfer through the fluid when its viscosity is increased by the magnetic field of the arrays in proximity. Sets of corresponding teeth on the driving member and driven member mesh when the rotation of the members is synchronized, providing positive direct drive to prolong the service life of the fluid.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: May 10, 2016
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Nilesh D. Mankame, Shivaram Ac, John C. Ulicny
  • Publication number: 20150330371
    Abstract: A device for cycling a component between a first condition and a second condition includes an element and a reset apparatus connected to and driven by the element. The element is formed from a shape memory alloy, wherein the alloy is transitionable between a martensite crystallographic phase and an austenite crystallographic phase in response to a thermal energy source. The apparatus is actuatable by the element from an initial state in which the alloy has the martensite phase and the component is in the first condition, to an actuated state in which the alloy has the austenite phase and the component is in the second condition. The apparatus is resettable from the actuated state to a reset state in which the alloy transitions from the austenite to the martensite phase while the component is in the first condition, and further resettable from the reset state to the initial state.
    Type: Application
    Filed: July 29, 2015
    Publication date: November 19, 2015
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Shivaram AC, Vidyashankar R. Buravalla, Paul W. Alexander
  • Patent number: 9127483
    Abstract: A device for cycling a component between a first condition and a second condition includes an element and a reset apparatus connected to and driven by the element. The element is formed from a shape memory alloy, wherein the alloy is transitionable between a martensite crystallographic phase and an austenite crystallographic phase in response to a thermal energy source. The apparatus is actuatable by the element from an initial state in which the alloy has the martensite phase and the component is in the first condition, to an actuated state in which the alloy has the austenite phase and the component is in the second condition. The apparatus is resettable from the actuated state to a reset state in which the alloy transitions from the austenite to the martensite phase while the component is in the first condition, and further resettable from the reset state to the initial state.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: September 8, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Shivaram Ac, Vidyashankar R. Buravalla, Paul W. Alexander