Patents by Inventor Sifa Gao

Sifa Gao 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).

  • Assembling method for a stator and stator produced thereby
    Patent number: 8754566
    Abstract: A laminated stator and a method for making a laminated stator of an electric motor. The method includes arranging a plurality of stator laminations into lamination stacks spaced axially from one another, each lamination stack including a first group of stator laminations including an annular portion and a plurality of tooth portions extending from a periphery of the annular portion, and a second group of stator laminations including only tooth portions positioned to correspond with the tooth portions of said first group. The method further includes winding stator windings around selected subsets of the plurality of teeth while the lamination stacks are spaced axially and meshing the lamination stacks with one another so the annular portions of the lamination stacks are axially adjacent one another and the plurality of teeth are intermeshed with the plurality of another stack.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: June 17, 2014
    Assignee: Nidec Motor Corporation
    Inventors: Ruimei Wang, Xianfa Li, Liang Sun, Sifa Gao
  • ASSEMBLING METHOD FOR A STATOR AND STATOR PRODUCED THEREBY
    Publication number: 20110148245
    Abstract: A laminated stator and a method for making a laminated stator of an electric motor. The method includes arranging a plurality of stator laminations into lamination stacks spaced axially from one another, each lamination stack including a first group of stator laminations including an annular portion and a plurality of tooth portions extending from a periphery of the annular portion, and a second group of stator laminations including only tooth portions positioned to correspond with the tooth portions of said first group. The method further includes winding stator windings around selected subsets of the plurality of teeth while the lamination stacks are spaced axially and meshing the lamination stacks with one another so the annular portions of the lamination stacks are axially adjacent one another and the plurality of teeth are intermeshed with the plurality of another stack.
    Type: Application
    Filed: December 16, 2010
    Publication date: June 23, 2011
    Applicant: Nidec Motor Corporation
    Inventors: Ruimei Wang, Xianfa Li, Liang Sun, Sifa Gao