Patents by Inventor Hiroki Shiigi

Hiroki Shiigi 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).

  • Bi-directional overrunning clutched differential unit
    Patent number: 8312792
    Abstract: In a bi-directional overrunning clutched differential unit, a pair of coaxial hubs are relatively unrotatably fitted on respective coaxial output shafts, and are relatively rotatably inserted into a cage holding rollers. A pair of second bearings journal a clutch housing disposed around the cage is diametrically larger than a pair of first bearings journaling the respective hubs, and are disposed between the first bearings in the axial direction of the output shafts. An axial end portion of the cage and the second bearing on the same axial side are distant from the first bearing on the same axial side so as to have a space where a friction mechanism for applying a frictional rotation resistance onto the cage is disposed.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: November 20, 2012
    Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventors: Yoshitaka Kochidomari, Hiroki Shiigi
  • Bi-directional overrunning clutched differential unit
    Patent number: 7938041
    Abstract: In a bi-directional overrunning clutched differential unit, a pair of coaxial hubs are relatively unrotatably fitted on respective coaxial output shafts, and are relatively rotatably inserted into a cage holding rollers. A pair of second bearings journal a clutch housing disposed around the cage is diametrically larger than a pair of first bearings journaling the respective hubs, and are disposed between the first bearings in the axial direction of the output shafts. An axial end portion of the cage and the second bearing on the same axial side are distant from the first bearing on the same axial side so as to have a space where a friction mechanism for applying a frictional rotation resistance onto the cage is disposed.
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: May 10, 2011
    Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventors: Hiroki Shiigi, Tomoyuki Ebihara