Patents Assigned to C.S.U. Ltd.
  • Rotary structure
    Patent number: 5048982
    Abstract: This invention relates to a rotary structure adapted to be used as a spindle unit for a miniature motor or miniature rotor or as a tape guide roller for a VTR. In the structure of the rotary mechanism, instead of a conventional expensive radial ball bearing, a substantially V-shaped groove is formed on a shaft itself so as to hold balls provided between this groove and the tapered surface or concave spherical ball receiving surface of an outer race provided around the groove.
    Type: Grant
    Filed: October 11, 1990
    Date of Patent: September 17, 1991
    Assignee: C.S.U. Ltd.
    Inventor: Tsutomu Nakanishi
  • Rotary structure
    Patent number: 4993851
    Abstract: A rotary structure adapted to be used as a spindle unit for a miniature motor or miniature rotor or as a tape guide roller for a VTR. In the structure of the rotary mechanism, instead of a conventional expensive radial ball bearings, a substantially V-shaped groove is formed in the shaft itself so as to hold balls between this groove and the tapered surface or concave spherical ball receiving surface of an outer race provided around the groove.
    Type: Grant
    Filed: June 26, 1990
    Date of Patent: February 19, 1991
    Assignee: C.S.U. Ltd.
    Inventor: Tsutomu Nakanishi
  • Ball bearing
    Patent number: 4958943
    Abstract: This invention is to provide a ball bearing which has a performance close to that of the conventional radial ball bearing, is simple in the formation and is low in the cost for such bearing as for fitting the disc of a disc recording and reproducing device or the roller of the drawer of a desk or the like.
    Type: Grant
    Filed: January 5, 1989
    Date of Patent: September 25, 1990
    Assignee: C.S.U. Ltd
    Inventor: Tsutomu Nakanishi
  • Spindle unit
    Patent number: 4958945
    Abstract: A spindle unit adapted to be used for miniature motors and miniature rotors.
    Type: Grant
    Filed: April 6, 1989
    Date of Patent: September 25, 1990
    Assignee: C.S.U. Ltd.
    Inventor: Tsutomu Nakanishi
  • Rotary head assembly for digital audio tape recorders
    Patent number: 4939606
    Abstract: This invention relates to a rotary head assembly to be used for digital audio tape recorders (DAT) and the like. A magnetic tape can be made to run parallelly with a drum, the apparatus can be made small and light and the mechanism can be simplified.
    Type: Grant
    Filed: April 5, 1988
    Date of Patent: July 3, 1990
    Assignee: C.S.U. Ltd.
    Inventor: Tsutomu Nakanishi
  • Rotary structure
    Patent number: 4934843
    Abstract: This invention relates to a rotary structure adapted to be used for a spindle unit of a miniature motor or miniature rotor or for a tape guide roller of a VTR or the like. In the structure of the rotary mechanism, instead of the conventional expensive radial ball bearings, recessed step parts are formed in the shaft itself and balls are held by and between the recessed step parts and ball receiving surfaces formed as tapered surfaces surfaces on outer races provided around the periphery of the shaft.
    Type: Grant
    Filed: July 10, 1989
    Date of Patent: June 19, 1990
    Assignee: C.S.U. Ltd
    Inventor: Tsutomu Nakanishi
  • Ball bearing
    Patent number: 4909640
    Abstract: This invention is to provide a ball bearing which has a performance close to that of the conventional radial ball bearing, is simple in the formation and is low in the cost for such bearing as for fitting the disc of a disc recording and reproducing device or the roller of the drawer of a desk or the like.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: March 20, 1990
    Assignee: C.S.U. Ltd.
    Inventor: Tsutomu Nakanishi
  • Rotary structure
    Patent number: 4883370
    Abstract: A rotary structure adapted to be used as a spindle unit for a miniature motor or miniature rotor or as a tape guide roller for a VTR. In the structure of the rotary mechanism, instead of a conventional expensive radial ball bearing, a groove of a semicircular cross-section is formed in a shaft itself so as to hold balls between this groove and the ball receiving concave surface of an outer race provided around the groove.
    Type: Grant
    Filed: January 27, 1987
    Date of Patent: November 28, 1989
    Assignee: C.S.U. Ltd.
    Inventor: Tsutomu Nakanishi