Patents by Inventor M. R. Ramakrishnan

M. R. Ramakrishnan 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).

  • Composite valve seal
    Patent number: 5901944
    Abstract: A composite sealing unit for sealing between moving parts in a valve is disclosed. The sealing unit has a sealing portion that interfaces with the moving parts and is adapted to isolate a reinforcing portion from media within the valve. The reinforcing portion, which can be encapsulated within the sealing unit, is operative to enhance the resiliency of the sealing unit.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: May 11, 1999
    Assignee: Xomox
    Inventors: M. R. Ramakrishnan, Michael J. Sandling, Steven M. Kirk
  • Valve with consumable vent hole seal device
    Patent number: 5551471
    Abstract: A valve with a rotatable valving member has a vent hole extending between an internal cavity of the valve and another location to which excess pressure can be vented. The vent hole is sealed with a consumable vent hole seal device that ruptures or otherwise vents under the high temperature and/or pressure of a fire and prevents dangerous pressure buildup within the internal cavity of the valve.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: September 3, 1996
    Assignee: Xomox Corporation
    Inventors: Michael Sandling, David E. Klotter, Edward Scheid, M. R. Ramakrishnan