Patents by Inventor Gregory J Parra

Gregory J Parra 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).

  • Valve with self-expanding seals
    Patent number: 7988127
    Abstract: A valve device includes a valve body having a cavity, a stopper member in the cavity, and a fluid passage in fluidic communication with the cavity when the valve device is in an open state. A stem is coupled to the stopper member for driving the stopper member to open or close the valve. The stem extends through a stem aperture in the valve body. A first self-expanding seal around the stem is used to seal off an annular gap around the stem. A second self-expanding seal and a third self-expanding seal are disposed around the fluid passage substantially concentrically to prevent leakage. A method for assembling and sealing the valve device, and a valve system are also provided.
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: August 2, 2011
    Inventor: Gregory J Parra
  • Valve with Self-Expanding Seals
    Publication number: 20080157016
    Abstract: A valve device includes a valve body having a cavity, a stopper member in the cavity, and a fluid passage in fluidic communication with the cavity when the valve device is in an open state. A stem is coupled to the stopper member for driving the stopper member to open or close the valve. The stem extends through a stem aperture in the valve body. A first self-expanding seal around the stem is used to seal off an annular gap around the stem. A second self-expanding seal and a third self-expanding seal are disposed around the fluid passage substantially concentrically to prevent leakage. A method for assembling and sealing the valve device, and a valve system are also provided.
    Type: Application
    Filed: December 31, 2007
    Publication date: July 3, 2008
    Inventor: Gregory J. Parra