Patents by Inventor Gregory A. Holmann

Gregory A. Holmann 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).

  • Gas assisted injection molding with fixed volume gas reservoir and temperature control
    Patent number: 7182892
    Abstract: A method and system for forming an injection molded plastic part. After the injection of plastic material has started, a volume of gas from a fixed volume reservoir is introduced into the plastic material at a low pressure forming a hollow cavity. The introduction of this volume of gas is initiated when the temperature of the plastic material in the mold has reached a predetermined value. After the mold is filled and packed with plastic, pressurized gas is introduced into the hollow cavity forming the completed plastic part.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: February 27, 2007
    Assignee: Lear Corporation
    Inventors: Gregory A. Holmann, James Hendry