Patents by Inventor Edgar Pfister

Edgar Pfister 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: 6077038
    Abstract: A brush seal assembly for turbo-engines is provided for sealing off spaces on a circumferential gap which are differently acted upon by pressure, particularly between an engine stator and an engine rotor. A holding device for a bristle bundle is provided on the engine stator, from which holding device the bristle bundle is guided between circumferential webs in a sealing manner against the engine rotor and forms an axial gap in the circumferential direction with respect to one web facing the high-pressure side. The upstream one of the circumferential webs, together with the engine rotor surface, forms an axial ring gap for flow of fluid therethrough. Turbulence reducing structure is disposed upstream of the upstream web in the high pressure space and serves to reduce the turbulence in flow of air from the upstream space through the axial ring gap. This turbulence reducing structure can be in the form of a metal sponge and/or a honey comb structure.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: June 20, 2000
    Assignee: MTU Motoren- und Turbinen-Union Muenchen GmbH
    Inventors: Alfons Gail, Uwe Michel, Edgar Pfister, Lothar Reisinger, Thomas Miller
  • Patent number: 5752805
    Abstract: A brush seal assembly for turbo-engines is provided for sealing off spaces on a circumferential gap which are differently acted upon by pressure, particularly between an engine stator and an engine rotor. A holding device for a bristle bundle is provided on the engine stator, from which holding device the bristle bundle is guided between circumferential webs in a sealing manner against the engine rotor and forms an axial gap in the circumferential direction with respect to one web facing the high-pressure side. In this case, at least on the side which faces the space of the higher pressure on the seal, the bristle bundle is to have devices for the shielding against a turbulent flow triggered by the engine rotor.
    Type: Grant
    Filed: July 16, 1996
    Date of Patent: May 19, 1998
    Assignee: MTU Motoren- und Turbinen-Union
    Inventors: Alfons Gail, Uwe Michel, Edgar Pfister, Lothar Reisinger, Thomas Miller