Patents by Inventor Ashok V. Retnaswamy

Ashok V. Retnaswamy 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).

  • Plasma cutting system with efficient components
    Patent number: 9908195
    Abstract: A plasma cutting system is provided. The system includes a power source configured to generate a plasma arc, and a plasma arc torch connected to the power source for delivering the plasma arc to a workpiece. The plasma arc torch defines a multi-function fluid flow path for sustaining the plasma arc and cooling the plasma arc torch such that the plasma cutting system has a power-to-gas flow ratio of at least 2 kilowatts per cubic feet per minute (KW/cfm). The power-to-gas flow ratio comprises a ratio of power of the generated plasma arc to a total gas flow supplied to the plasma arc torch.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: March 6, 2018
    Assignee: Hypertherm, Inc.
    Inventors: Jesse A. Roberts, Shreyansh Patel, Stephen T. Eickhoff, Justin Gullotta, Qinghua Liu, Dennis M. Borowy, Zheng Duan, Ashok V. Retnaswamy, Sung Je Kim
  • Plasma Cutting System with Efficient Components
    Publication number: 20150343554
    Abstract: A plasma cutting system is provided. The system includes a power source configured to generate a plasma arc, and a plasma arc torch connected to the power source for delivering the plasma arc to a workpiece. The plasma arc torch defines a multi-function fluid flow path for sustaining the plasma arc and cooling the plasma arc torch such that the plasma cutting system has a power-to-gas flow ratio of at least 2 kilowatts per cubic feet per minute (KW/cfm). The power-to-gas flow ratio comprises a ratio of power of the generated plasma arc to a total gas flow supplied to the plasma arc torch.
    Type: Application
    Filed: January 30, 2015
    Publication date: December 3, 2015
    Inventors: Jesse A. Roberts, Shreyansh Patel, Stephen T. Eickhoff, Justin Gullotta, Qinghua Liu, Dennis M. Borowy, Zheng Duan, Ashok V. Retnaswamy, Sung Je Kim
  • Electronic pressure regulator
    Patent number: 8847103
    Abstract: A system and method for regulating a gas flow of a plasma arc system. The system having a gas regulator that control gas flow from a gas source to the plasma torch system, a pilot input valve to fill a pilot chamber and a pilot dump valve to evacuate the pilot chamber, the pilot chamber mechanically coupled to the gas regulator through a pressure actuator, such that the gas flow pressure through the regulator is controlled using the pressure actuator and based on the pressure in the pilot chamber.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: September 30, 2014
    Assignee: Hypertherm, Inc.
    Inventor: Ashok V. Retnaswamy
  • Electronic Pressure Regulator
    Publication number: 20120012567
    Abstract: A system and method for regulating a gas flow of a plasma arc system. The system having a gas regulator that control gas flow from a gas source to the plasma torch system, a pilot input valve to fill a pilot chamber and a pilot dump valve to evacuate the pilot chamber, the pilot chamber mechanically coupled to the gas regulator through a pressure actuator, such that the gas flow pressure through the regulator is controlled using the pressure actuator and based on the pressure in the pilot chamber.
    Type: Application
    Filed: April 19, 2011
    Publication date: January 19, 2012
    Applicant: Hypertherm, Inc.
    Inventor: Ashok V. Retnaswamy