Patents by Inventor Terrence C. Pearson

Terrence C. Pearson 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).

  • Plastic expulsion process for forming hollow tubular products
    Patent number: 6953546
    Abstract: A system and process for gas assisted plastic injection molding, particularly of hollow tubular components. The plastic material is injected into the mold cavity through an apex of a cone-shaped inlet configuration. After the molding pressure is held for a period of time, gas is injected into the plastic material and pressure is again held for a period of time, a valve member is opened allowing plastic to be expelled into a secondary cavity. The flow of the plastic and gas are controlled in an axial direction in order to prevent turbulence. The gas flow axially along the center of the tubular member allows the expulsion of plastic from the center uniformly along the length of the tube. In an alternative process, the gas is displaced axially into the barrel of the injection molding machine.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: October 11, 2005
    Assignee: Cinpres Gas Injection Ltd.
    Inventor: Terrence C. Pearson
  • Plastic expulsion process
    Patent number: 6767487
    Abstract: A system and process for gas assisted plastic injection molding. The plastic material is injected into the mold cavity and the molding pressure is held for a period of time. Thereafter, gas is injected into the plastic material and the pressure is again held for a period of time. Thereafter, valve members are opened allowing plastic to be expelled into one or more secondary cavities, or to be expelled back into the machine barrel.
    Type: Grant
    Filed: July 10, 2001
    Date of Patent: July 27, 2004
    Assignee: Cinpres Gas Injection Ltd.
    Inventor: Terrence C. Pearson
  • Plastic expulsion process
    Publication number: 20040135291
    Abstract: A system and process for gas assisted plastic injection molding. The plastic material is injected into the mold cavity and the molding pressure is held for a period of time. Thereafter, gas is injected into the plastic material and the pressure is again held for a period of time. Thereafter, valve members are opened allowing plastic to be expelled into one or more secondary cavities, or to be expelled back into the machine barrel.
    Type: Application
    Filed: October 14, 2003
    Publication date: July 15, 2004
    Inventor: Terrence C. Pearson
  • Plastic expulsion process
    Publication number: 20030011110
    Abstract: A system and process for gas assisted plastic injection molding. The plastic material is injected into the mold cavity and the molding pressure is held for a period of time. Thereafter, gas is injected into the plastic material and the pressure is again held for a period of time. Thereafter, valve members are opened allowing plastic to be expelled into one or more secondary cavities, or to be expelled back into the machine barrel.
    Type: Application
    Filed: July 10, 2001
    Publication date: January 16, 2003
    Inventor: Terrence C. Pearson
  • Plastic expulsion process for forming hollow tubular products
    Publication number: 20030011111
    Abstract: A system and process for gas assisted plastic injection molding, particularly of hollow tubular components. The plastic material is injected into the mold cavity through an apex of a cone-shaped inlet configuration. After the molding pressure is held for a period of time, gas is injected into the plastic material and pressure is again held for a period of time, a valve member is opened allowing plastic to be expelled into a secondary cavity. The flow of the plastic and gas are controlled in an axial direction in order to prevent turbulence. The gas flow axially along the center of the tubular member allows the expulsion of plastic from the center uniformly along the length of the tube. In an alternative process, the gas is displaced axially into the barrel of the injection molding machine.
    Type: Application
    Filed: July 30, 2001
    Publication date: January 16, 2003
    Inventor: Terrence C. Pearson