Patents by Inventor Werner Rietschle

Werner Rietschle 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).

  • Multi-stage side channel pump
    Patent number: 6394748
    Abstract: In a multi-stage side channel pump, the efficiency can be optimized in that the geometry of each subsequent stage (14) is adapted to the specific volume of the medium at the outlet of the preceding stage (12) by determining the dimensions of the impeller diameter (D) and of the flow channel diameter (d). The stage pressure is the same for both stages (12, 14). The impeller geometry of the next stage (14) is determined by means of the volume ratio of the preceding stage (12) to the next stage (14), assuming geometric similarity.
    Type: Grant
    Filed: February 22, 2000
    Date of Patent: May 28, 2002
    Assignee: Werner Rietschle GmbH + Co. KG
    Inventors: Werner Rietschle, Markus Britsche
  • Rotary vane evacuating pump
    Patent number: 4588358
    Abstract: A rotary vane evacuating pump having two series connected pumping stages is disclosed. Each pumping stage is provided as an exchangeable unit and has a housing which is detachably connected to one face of an interface flange. The housings of the pumping stages are contained in a chamber defined between the interface flange and an outer shell which is detachably mounted thereto. The chamber is filled with water surrounding and contacting the two housings. Each pumping stage is readily dismantled for the purpose of service or replacement.
    Type: Grant
    Filed: July 2, 1984
    Date of Patent: May 13, 1986
    Assignee: Werner Rietschle Maschinen-und Apparatebau GmbH
    Inventor: Werner Rietschle