Patents by Inventor Dirk Ehrenfeld

Dirk Ehrenfeld 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).

  • Patent number: 9011125
    Abstract: A vane pump includes at least one vane, a pump housing with a bottom and a lid, and a rotor rotatably mounted in the pump housing, with the at least one vane being slidingly mounted in a groove in the rotor and having at least one vane tip which protrudes from the outer peripheral surface of the rotor and rests upon the inner peripheral surface of the pump housing so that the vane defines with the bottom and the lid an intake chamber and a pressure chamber to respectively interact with a radially outer inlet opening and outlet opening in the bottom and/or in the lid, wherein the rotor is provided on the peripheral edge with a chamfer in facing relationship to the housing bottom and/or the housing lid having the inlet opening and/or outlet opening.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: April 21, 2015
    Assignee: Joma-Polytec GmbH
    Inventors: Dirk Ehrenfeld, Willi Schneider, Torsten Helle
  • Publication number: 20130216419
    Abstract: A vane pump includes at least one vane, a pump housing with a bottom and a lid, and a rotor rotatably mounted in the pump housing, with the at least one vane being slidingly mounted in a groove in the rotor and having at least one vane tip which protrudes from the outer peripheral surface of the rotor and rests upon the inner peripheral surface of the pump housing so that the vane defines with the bottom and the lid an intake chamber and a pressure chamber to respectively interact with a radially outer inlet opening and outlet opening in the bottom and/or in the lid, wherein the rotor is provided on the peripheral edge with a chamfer in facing relationship to the housing bottom and/or the housing lid having the inlet opening and/or outlet opening.
    Type: Application
    Filed: July 27, 2011
    Publication date: August 22, 2013
    Inventors: Dirk Ehrenfeld, Willi Schneider, Torsten Helle
  • Publication number: 20130022487
    Abstract: The invention relates to a vane pump comprising a pump housing that has a sleeve-shaped housing body, a bottom, and a cover, with the bottom and cover axially closing the housing body. The vane pump also has a rotor, which lies eccentrically in the housing body and which is rotatably mounted in the bottom and the cover, and one or more vanes which are movably mounted in the rotor in an axial direction. Each vane has bearing pins on the axial end faces thereof, with the bearing pins engaging in the bottom and the cover.
    Type: Application
    Filed: January 4, 2011
    Publication date: January 24, 2013
    Applicant: JOMA-POLYTEC GMBH
    Inventors: Torsten Helle, Benjamin Pyrdok, Willi Schneider, Dirk Ehrenfeld
  • Patent number: 8210836
    Abstract: The disclosure relates to a vane cell pump having an external rotor, an internal rotor and a plurality of vanes which are secured in a pivotable manner on the external rotor and which are displacably mounted in a radial manner in the inner rotor, essentially in radial slots. The external rotor is guided along the inner circumferential surface of a stator. The axis of the stator and the axis of the internal rotor are offset in relation to each other, and the stator can be adjusted in the radial direction in relation to the internal rotor and can be modified by the offset. Said stator is partially enclosed by a clamp which is mounted in a pivotable bearing in the housing of the vane cell pump. The clamp includes clamp arms which protrude on both sides of the pivotable bearing, which partially enclose, respectively, the stator.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: July 3, 2012
    Assignee: Joma-Hydromechanic GmbH
    Inventors: Willi Schneider, Torsten Helle, Dirk Ehrenfeld
  • Publication number: 20070292291
    Abstract: The disclosure relates to a vane cell pump having an external rotor, an internal rotor and a plurality of vanes which are secured in a pivotable manner on the external rotor and which are displacably mounted in a radial manner in the inner rotor, essentially in radial slots. The external rotor is guided along the inner circumferential surface of a stator. The axis of the stator and the axis of the internal rotor are offset in relation to each other, and the stator can be adjusted in the radial direction in relation to the internal rotor and can be modified by the offset. Said stator is partially enclosed by a clamp which is mounted in a pivotable bearing in the housing of the vane cell pump. The clamp includes clamp arms which protrude on both sides of the pivotable bearing, which partially enclose, respectively, the stator.
    Type: Application
    Filed: August 28, 2007
    Publication date: December 20, 2007
    Applicant: Joma-Hydromechanic GmbH
    Inventors: Willi Schneider, Torsten Helle, Dirk Ehrenfeld