Patents by Inventor Heinrich Hellmann

Heinrich Hellmann 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).

  • Air-cooled electric rotary machine
    Patent number: 6740993
    Abstract: An air-cooled electric rotary machine includes a stator with a stator core formed of laminations and having axial ends, which terminate in winding end portions, and a rotor, which is encircled by the stator with an air gap therebetween. Plural air channels, separated from one another, are formed in or at the stator core for allowing an air stream in complementary flow directions, wherein the air stream is generated by a single fan and deflected at the winding end portions in a looped air stream conduction.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: May 25, 2004
    Assignee: Siemens Aktiengesellschaft
    Inventors: Klaus Greubel, Heinrich Hellmann, Uwe Schueller
  • Air-cooled electric rotary machine
    Publication number: 20020130566
    Abstract: An air-cooled electric rotary machine includes a stator with a stator core formed of laminations and having axial ends, which terminate in winding end portions, and a rotor, which is encircled by the stator with an air gap therebetween. Plural air channels, separated from one another, are formed in or at the stator core for allowing an air stream in complementary flow directions, wherein the air stream is generated by a single fan and deflected at the winding end portions in a looped air stream conduction.
    Type: Application
    Filed: March 15, 2002
    Publication date: September 19, 2002
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Klaus Greubel, Heinrich Hellmann, Uwe Schueller