Patents by Inventor Suryakant K. Dawawala

Suryakant K. Dawawala 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).

  • Steam turbine control valve
    Patent number: 5172719
    Abstract: A control valve for use in the steam chest of a steam turbine is provided. Considerable stiffness is imparted to the valve by employing a large diameter spring housing which encloses the valve springs. In addition, the bonnet of the valve is oversized and the screws attaching the bonnet to the steam chest are arranged in a circle inside the spring housing, thereby allowing the spring housing to be attached to the bonnet by a plurality of screws arranged in a large circle around the outside of the spring housing. The spring housing lower flange engages a spigot on the bonnet in a tight fit. The spring seat slides within the spring housing and has integral lugs which extend through windows in the spring housing. The lugs allow the spring seat to be restrained to the upper flange of the spring housing so that the coupling connecting the valve actuator piston rod to the valve steam can be assembled and disassembled during installation and maintenance.
    Type: Grant
    Filed: July 19, 1991
    Date of Patent: December 22, 1992
    Assignee: Westinghouse Electric Corp.
    Inventors: Suryakant K. Dawawala, Jim G. Schwartz
  • Control valve
    Patent number: 4834133
    Abstract: A control valve particularly for use in a steam power plant includes a hollow valve body having a pair of aligned openings therethrough. A cylindrical valve bonnet extends through one of the openings in the valve body and is secured to the valve body. A cylindrical plug guide is secured to the end of the valve bonnet within the valve body and extends lonitudinally from the valve bonnet to the other opening in the valve body. A stationary valve seat is secured to the end of the plug guide adjacent the other opening in the valve body. A valve plug is slidably mounted in said valve guide and valve bonnet for movement toward and away from the valve seat. Actuating means extends through the valve bonnet and is connect to the valve plug for moving the valve plug into and out of engagement with the valve seat.
    Type: Grant
    Filed: September 28, 1988
    Date of Patent: May 30, 1989
    Assignee: Westinghouse Electric Corp.
    Inventors: Bernard L. LaCoste, Suryakant K. Dawawala, Robert M. Nelson
  • Steam turbine control valve for cyclic duty
    Patent number: 4679769
    Abstract: A control valve for cyclic duty steam turbines having a one piece bonnet configuration which has been designed to minimize the affects of and withstand expected cyclic stresses during hot, warm and cold startup conditions of turbines utilized for peak loading.
    Type: Grant
    Filed: November 28, 1986
    Date of Patent: July 14, 1987
    Assignee: Westinghouse Electric Corp.
    Inventors: Suryakant K. Dawawala, Bernard L. LaCoste