Patents by Inventor Eugene E. Heston

Eugene E. Heston 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).

  • Self-purging screen changer and strainer plate
    Patent number: 3983038
    Abstract: A screen changer having a replacement strainer plate in sealing engagement with a sealing plate and grooves in the engaged surfaces of the strainer plate and the sealing plate for communicating extruded material from the changer opening to the central strainer portion of the replacement strainer for prefilling and purging the strainer of air. The grooves are closed in the storage position of the strainer plate and opened in a preliminary change position for purging the strainer. The strainer has a venting space at one side of the central strainer portion which is in communication with a vent in a cover plate for venting air from the replacement strainer as it is being prefilled with the extruded material.
    Type: Grant
    Filed: November 3, 1975
    Date of Patent: September 28, 1976
    Inventor: Eugene E. Heston