Patents by Inventor William F. Helms

William F. Helms 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).

  • Expandable seal assembly apparatus and method
    Patent number: 6845876
    Abstract: The expandable seal assembly can be used to seal the contents of a container. When air pressure is applied to a chamber, rods with leaf springs on a distal end extend outward mating an expandable elastic to the inside edge of the container to be sealed. A spring-mounted ball valve maintains the pressure in the chamber when the source of the air pressure applied to the chamber is removed.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: January 25, 2005
    Inventor: William F. Helms, Jr.
  • Expandable seal assembly apparatus and method
    Publication number: 20030234253
    Abstract: The expandable seal assembly can be used to seal the contents of a container. When air pressure is applied to a chamber, rods with leaf springs on a distal end extend outward mating an expandable elastic to the inside edge of the container to be sealed. A spring-mounted ball valve maintains the pressure in the chamber when the source of the air pressure applied to the chamber is removed.
    Type: Application
    Filed: June 20, 2002
    Publication date: December 25, 2003
    Inventor: William F. Helms