Patents Assigned to Roll-Rite Corp.
  • Self-steering caster
    Patent number: 4280246
    Abstract: A self-steering caster is biased into one or more predetermined steering positions with a constant force by a bias wheel arranged to roll along a cam surface in the shape of a circle which is concentric with the caster's swivel axis and whose radius increases at a linear rate in both directions from the point corresponding to the steering position to a point or points on the cam surface remote from the steering position. Detent means may be provided at the steering position to releasably lock the caster in the steering position.
    Type: Grant
    Filed: January 10, 1980
    Date of Patent: July 28, 1981
    Assignee: Roll-Rite Corp.
    Inventor: Carl O. Christensen
  • Flutter-resistant caster
    Patent number: 4097954
    Abstract: Fluttering of caster wheels having a swivel mechanism including ball-type or roller-type bearings is effectively prevented by substituting, for some of the steel rolling elements of the bearings, resilient rubber-like rolling elements of somewhat greater diameter. Flutter resistance and steering characteristics of the caster can be varied by varying the size of the resilient rolling elements, or the proportion of resilient rolling elements to steel rolling elements in the bearing.
    Type: Grant
    Filed: January 26, 1977
    Date of Patent: July 4, 1978
    Assignee: Roll-Rite Corp.
    Inventor: Carl O. Christensen