Patents by Inventor Kennta Yamazaki

Kennta Yamazaki 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).

  • Constant velocity universal joint
    Patent number: 6652385
    Abstract: The constant velocity universal joint comprises an outer joint member 1 that has three curved guide grooves 1b formed in the axial direction on a spherical inner circumferential surface 1a thereof, an inner joint member 2 that has three curved guide grooves 2b formed in the axial direction on a spherical outer circumferential surface 2a thereof, three torque transmitting balls 3 disposed in ball tracks that are formed by the coordination of the guide grooves 1b of the outer joint member 1 and the guide grooves 2b of the inner joint member 2, a cage 4 that holds the balls 3, and elastic pressing means 5 interposed between the outer circumferential surface 2a of the inner joint member 2 and the inner circumferential surface 4a of the cage 4.
    Type: Grant
    Filed: October 10, 2002
    Date of Patent: November 25, 2003
    Assignee: NTN Corporation
    Inventors: Tetsuro Kadota, Kennta Yamazaki
  • Constant velocity universal joint
    Publication number: 20030050125
    Abstract: The constant velocity universal joint comprises an outer joint member 1 that has three curved guide grooves 1b formed in the axial direction on a spherical inner circumferential surface 1a thereof, an inner joint member 2 that has three curved guide grooves 2b formed in the axial direction on a spherical outer circumferential surface 2a thereof, three torque transmitting balls 3 disposed in ball tracks that are formed by the coordination of the guide grooves 1b of the outer joint member 1 and the guide grooves 2b of the inner joint member 2, a cage 4 that holds the balls 3, and elastic pressing means 5 interposed between the outer circumferential surface 2a of the inner joint member 2 and the inner circumferential surface 4a of the cage 4.
    Type: Application
    Filed: October 10, 2002
    Publication date: March 13, 2003
    Applicant: NTN Corporation
    Inventors: Tetsuro Kadota, Kennta Yamazaki
  • Constant velocity universal joint
    Patent number: 6488588
    Abstract: The constant velocity universal joint comprises an outer joint member 1 that has three curved guide grooves 1b formed in the axial direction on a spherical inner circumferential surface 1a thereof, an inner joint member 2 that has three curved guide grooves 2b formed in the axial direction on a spherical outer circumferential surface 2a thereof, three torque transmitting balls 3 disposed in ball tracks that are formed by the coordination of the guide grooves 1b of the outer joint member 1 and the guide grooves 2b of the inner joint member 2, a cage 4 that holds the balls 3, and elastic pressing means 5 interposed between the outer circumferential surface 2a of the inner joint member 2 and the inner circumferential surface 4a of the cage 4.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: December 3, 2002
    Assignee: NTN Corporation
    Inventors: Tetsuro Kadota, Kennta Yamazaki