Patents Assigned to Duoroll A.G.
  • Multi-wheel in-line roller skates
    Patent number: 4132425
    Abstract: A two wheel roller skate with at least one steerable wheel (4) mounted on a yoke (5) which is pivotally connected to a steering element (6) mounted on the frame (1) of the skate to pivot about a tilting axis. The yoke (5) is also pivotally connected to the frame (1) by a joint (14). The steering axis (11) of the wheel (4) is preferably perpendicular to the ground and the angle alpha between the tilting axis and the ground is less than 90.degree..
    Type: Grant
    Filed: June 28, 1976
    Date of Patent: January 2, 1979
    Assignee: Duoroll A.G.
    Inventors: Aladar Lehner, Istvan Varga