Patents by Inventor Johan G. Wormmeester

Johan G. Wormmeester 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).

  • Rotary positive displacement pump, especially gear pump
    Patent number: 4253803
    Abstract: Rotary displacement pump, of which the delivery pressure can be adjusted by modifying the losses in the gap between the lateral flank or flanks of one or more of the gear wheels and the house in which these gear wheels are enclosed, at the place of this gap also the mouth of a channel being present, which channel is or can be connected to a return line.
    Type: Grant
    Filed: January 19, 1979
    Date of Patent: March 3, 1981
    Assignee: Fuelmaster Produktie Maatschappij B.V.
    Inventors: Johan G. Wormmeester, Gyula I. Baranyai