Patents Assigned to Koya Seiko Co., Ltd.
  • Rotating tool and traction drive unit therefor
    Patent number: 4950110
    Abstract: A rotating tool includes a drive source, a work piece, and a traction drive unit intercoupled between the drive source and work piece. The traction drive unit includes a unit case having a through-hole, a drive shaft and a follower shaft inserted into the through-hole and supported via a rolling bearing, and a plurality of planet rollers installed between the rolling bearing and the drive shaft in a frictionally rotatable condition and supported at the side of the follower shaft.
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: August 21, 1990
    Assignee: Koya Seiko Co., Ltd.
    Inventor: Keiji Suzuki