Patents by Inventor Mourad Lakehel

Mourad Lakehel 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).

  • Steam turbine
    Patent number: 8167548
    Abstract: A steam turbine is provided having a rotor which rotates around a machine axis, and a stator which concentrically encompasses the rotor with clearance, between which an annular passage is formed which is exposed to throughflow by steam in the axial direction and in which a multiplicity of rotor blades, which are fastened on the rotor, and fixed stator blades are arranged in a plurality of stages, wherein the stator blades of the last stage have a sweep with a sweep angle which changes in sign over the relative blade height.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: May 1, 2012
    Assignee: Alstom Technology Ltd.
    Inventors: Ralf Greim, Mourad Lakehel
  • Stator blade for a turbomachine, especially a stream turbine
    Publication number: 20110164970
    Abstract: The invention relates to a stator blade (4) of a turbomachine, especially of a steam turbine, which has the following geometric features. A lean curvature, a swept curvature, a twist in the radial direction of the respective blade (4), a hub-side circumferential step (14) which in the direction of flow (15) falls away inwards and radially to the rotational axis (8) of the turbomachine, a chord length (s) of the blade which varies over the radial extent of the stator blade (4), and also a cross-sectional profile of the blade (4) which varies over the radial extent of the stator blade (4).
    Type: Application
    Filed: December 23, 2010
    Publication date: July 7, 2011
    Applicant: ALSTOM Technology Ltd
    Inventors: Ralf Greim, Said Havakechian, Mourad Lakehel, Carsten Mumm
  • Stator blade for a turbomachine, especially a steam turbine
    Publication number: 20090257866
    Abstract: The invention relates to a stator blade (4) of a turbomachine, especially of a steam turbine, which has the following geometric features. A lean curvature, a swept curvature, a twist in the radial direction of the respective blade (4), a hub-side circumferential step (14) which in the direction of flow (15) falls away inwards and radially to the rotational axis (8) of the turbomachine, a chord length (s) of the blade which varies over the radial extent of the stator blade (4), and also a cross-sectional profile of the blade (4) which varies over the radial extent of the stator blade (4).
    Type: Application
    Filed: September 30, 2008
    Publication date: October 15, 2009
    Applicant: ALSTOM Technology Ltd.
    Inventors: Ralf Greim, Said Havakechian, Mourad Lakehel, Carsten Mumm
  • STEAM TURBINE
    Publication number: 20090123276
    Abstract: A steam turbine is provided having a rotor which rotates around a machine axis, and a stator which concentrically encompasses the rotor with clearance, between which an annular passage is formed which is exposed to throughflow by steam in the axial direction and in which a multiplicity of rotor blades, which are fastened on the rotor, and fixed stator blades are arranged in a plurality of stages, wherein the stator blades of the last stage have a sweep with a sweep angle which changes in sign over the relative blade height.
    Type: Application
    Filed: November 6, 2008
    Publication date: May 14, 2009
    Applicant: ALSTOM TECHNOLOGY LTD
    Inventors: Ralf GREIM, Mourad LAKEHEL