Patents by Inventor Ramarao Digumarthi

Ramarao Digumarthi 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).

  • Method and apparatus for improved start-up procedures in conventional steam power generators and dual fluid cheng cycle engines
    Patent number: 4790269
    Abstract: An improved procedure for cold start-up of closed loop boiler set and Cheng cycle system wherein the venting step, the boiler swelling problem and blowdown step of the conventional start-up are eliminated by use of an external pressure source to increase the operating pressure in the evaporator section which minimizes premature phase change and accompanying volume increase.
    Type: Grant
    Filed: April 4, 1988
    Date of Patent: December 13, 1988
    Assignee: International Power Technology, Inc.
    Inventors: James Hamill, Ramarao Digumarthi, William Conlon, Dah Y. Cheng, Chung-Nan Chang
  • Method and apparatus for improved start-up procedures in conventional steam power generators and dual fluid Cheng cycle engines
    Patent number: 4735043
    Abstract: An improved procedure for cold start-up of closed loop boiler set and Cheng cycle system wherein the venting step, the boiler swelling problem and blowdown step of the conventional start-up are eliminated by use of an external pressure source to increase the operating pressure in the evaporator section which minimizes premature phase change and accompanying volume increase.
    Type: Grant
    Filed: July 8, 1985
    Date of Patent: April 5, 1988
    Assignee: International Power Technology
    Inventors: James Hamill, Ramarao Digumarthi, William Conlon, Dah Y. Cheng, Chun-Nan Chang
  • Method and apparatus for improved shutdown procedures in dual fluid Cheng cycle engines
    Patent number: 4597256
    Abstract: An improved shutdown procedure, which minimizes the potential for steam condensation in the superheater section, combustion chamber and turbines during the coast to halt of the engine maintains high temperatures until all the steam has passed through the system.
    Type: Grant
    Filed: April 16, 1985
    Date of Patent: July 1, 1986
    Assignee: International Power Technology, Inc.
    Inventors: James Hamill, Ramarao Digumarthi, William Conlon, Dah Y. Cheng, Chun-Nan Chang