Patents by Inventor Bernard P. Duch

Bernard P. Duch 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).

  • Device for introducing a substance, particularly a pulverulent substance, from a chamber having a pressure P1, into a chamber having a pressure P2 higher than P1
    Patent number: 4034870
    Abstract: The present invention comprises a device which allows to introduce a substance from a chamber A, having a pressure P1, into a chamber B, having a pressure P2 higher than P1, said device comprising a stator, in which the pressure is that of the chamber B and in which rotates a rotor formed by a chamber V at the pressure P1, said rotor comprising a central opening through which is introduced the product coming from the chamber A, and a peripheral slot adapted to be opened, under the thrust produced by the material collected in the rotor chamber V and subjected to centrifugal force, in order to let said material run through the slot, into the stator.
    Type: Grant
    Filed: May 15, 1975
    Date of Patent: July 12, 1977
    Inventor: Bernard P. Duch