Patents by Inventor Frank Duchscherer

Frank Duchscherer 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).

  • Casting system for the processing of casting resin
    Patent number: 4741623
    Abstract: Casting resin components (4,5) coming together in a mixer (6) are dosed and circulated by means of pump structures (3). Each pump structure (3) has a dosing pump (17, 9) and a circulating pump (16, 10). The piston (17) of the dosing pump (17, 9) does not leave its cylinder bore (9) during a pure circulation operation, while the piston (16) of the circulating pump (16, 10) alternately exits from its cylinder (10) and again moves into same.Since the same drive is used for the circulating pump (16, 10) and the dosing pump (17, 9), the expense of the system is low.
    Type: Grant
    Filed: June 19, 1986
    Date of Patent: May 3, 1988
    Assignee: Wilhelm Hedrich Vakuumanlagen GmbH & Co. KG
    Inventors: Erhard Haeuser, Frank Duchscherer