Patents by Inventor Thomas A. Grish

Thomas A. Grish 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).

  • Annular flow plastic extrusion nozzle or gate
    Patent number: 4368028
    Abstract: An annular flow plastic extrusion nozzle or gate is provided with a torpedo to heat the plastic to be extruded through the gate. A passage is provided around the torpedo and the torpedo has a flattened end in the parting line of the mold. An annular opening is provided around the base of the torpedo in the nozzle or gate housing. A conical recess is provided in the flat end of the torpedo to receive a correspondingly shaped male extension of a shaft or core pin removably mounted in a portion of the mold. A hub cavity in that portion of the mold may be provided around the end of the pin and mold cavities extend therefrom as desired to form propellers or impellers or rotors of the desired configuration. Discharge of the flowable plastic through the 360.degree.
    Type: Grant
    Filed: February 2, 1981
    Date of Patent: January 11, 1983
    Inventors: Anthony J. Grish, Thomas A. Grish