Patents by Inventor John Manhard

John Manhard 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 for conducting hyperpolarized gas
    Patent number: 7320322
    Abstract: The valve of the present invention provides a one-piece valve stem piston having a piston head and a piston stem. The piston head has a larger diameter than the piston stem. The stem incorporates only a single sliding O-ring in the area that seals the gas in the valve cylinder bore. The valve blocks gas flow by sealing against the positioning each O-ring over the gas flow port. This provides the valve with a low sliding friction upon piston movement. Pilot control air pressure is reduced because of the lower friction and due to the air operating on the larger surface area of the piston head. All materials in the construction of the valve are non-metallic.
    Type: Grant
    Filed: April 21, 2004
    Date of Patent: January 22, 2008
    Assignee: Medi-Physics, Inc.
    Inventor: John Manhard
  • Valve for conducting hyperpolarized gas
    Publication number: 20050022814
    Abstract: The valve of the present invention provides a one-piece valve stem piston having a piston head and a piston stem. The piston head has a larger diameter than the piston stem. The stem incorporates only a single sliding O-ring in the area that seals the gas in the valve cylinder bore. The valve blocks gas flow by sealing against the positioning each O-ring over the gas flow port. This provides the valve with a low sliding friction upon piston movement. Pilot control air pressure is reduced because of the lower friction and due to the air operating on the larger surface area of the piston head. All materials in the construction of the valve are non-metallic.
    Type: Application
    Filed: April 21, 2004
    Publication date: February 3, 2005
    Inventor: John Manhard