Patents by Inventor Zhejie Liu

Zhejie Liu 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).

  • Spindle motor with an aerodynamic and hydrodynamic bearing assembly
    Patent number: 6674201
    Abstract: A spindle motor (10) including a stator component (16), a rotor component (18), including a hub (14) for supporting one or more discs, and a bearing assembly between tHe components, formed of a journal bearing (54) and a thrust bearing (52), wherein the journal bearing (54) is an aerodynamic bearing and the thrust bearing is adapted to function in a bi-directional manner and includes an annular member (30) projecting radially from one of the components into an associated recess (76) formed in the other of the components. Preferably, the annular member has two opposed bearing faces (68,70) arranged adjacent corresponding bearing surfaces of the recess, and a hydrodynamic bearing is formed between the respective bearing faces and surfaces.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: January 6, 2004
    Assignee: Data Storage Institute
    Inventors: Zhejie Liu, QiDe Zhang, Shixin Chen, Teck Seng Low
  • Spindle motor with an aerodynamic and hydrodynamic bearing assembly
    Publication number: 20030025409
    Abstract: A spindle motor (10) including a stator component (16), a rotor component (18), including a hub (14) for supporting one or more discs, and a bearing assembly between tile components, formed of a journal bearing (54) and a thrust bearing (52), wherein the journal bearing (54) is an aerodynamic bearing and the thrust bearing is adapted to function in a bi-directional manner and includes an annular member (30) projecting radially from one of the components into an associated recess (76) formed in the other of the components. Preferably, the annular member has two opposed bearing faces (68,70) arranged adjacent corresponding, bearing surfaces of the recess, and a hydrodynamic bearing is formed between the respective bearing, faces and surfaces.
    Type: Application
    Filed: April 25, 2000
    Publication date: February 6, 2003
    Inventors: Zhejie Liu, QiDe Zhang, Shixin Chen, Teck Seng Low
  • Electric spindle motor
    Patent number: 6020664
    Abstract: An electric spindle motor has a base assembly (19) and a hollow notatable hub (16) housing a motor. The hub (16) is mounted for rotation about an axis and a stator (12) is mounted on the base assembly (19) inside the hub (16). A liquid filled journal bearing (11, 21) acts between the base assembly (19) and the hub (16) to provide radial support of the hub (16). A gas filled thrust bearing (26, 27, 35) also acts between the hub (16) and base assembly (19) to provide at least axial support of the hub (16).
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: February 1, 2000
    Assignee: Data Storage Institute
    Inventors: Zhejie Liu, Mohammed Abdul Jabbar, Qide Zhang, Teck Seng Low, Shixin Chen, Yuen Ann Mah
  • Electric spindle motor
    Patent number: 5969448
    Abstract: An electric spindle motor has a base assembly (19) and a hollow notatable hub (16) housing a motor. The hub (16) is mounted for rotation about an axis and a stator (12) is mounted on the base assembly (19) inside the hub (16). A liquid filled journal bearing (11,21) acts between the base assembly (19) and the hub (16) to provide radial support of the hub (16). A gas filled thrust bearing (26, 27, 35) also acts between the hub (16) and base assembly (19) to provide at least axial support of the hub (16).
    Type: Grant
    Filed: July 3, 1997
    Date of Patent: October 19, 1999
    Assignee: Data Storage Institute
    Inventors: Zhejie Liu, M.A. Jabbar, Qide Zhang, Teck Seng Low, Shixin Chen, Yuen Ann Mah