Ball roller
OwnerHiroshi Teramachiinventor
Life of this patent
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Abstract
The ball roller according to the present invention has a unique shape so that it can be handled just as easily as a conventional ball while being endurable against high load as is a roller. The ball roller comprises a spherical rolling portion with an arched surface, and two spherical end portions spherically protruding from both ends of the spherical rolling portion. The spherical rolling portion has a radius of curvature larger than that of each of the spherical end portions, curvature centers of the spherical end portions are located on the rotational axis of the spherical rolling portion. In another embodiment of the present invention, a ratio between the maximum diameter d of the spherical portion 2 and the distance W between the two apexes of the spherical end portions falls within a rage of approximately 80%±17%.
Claims2
A ball roller comprising a spherical rolling portion with an arcuate surface and spherical end portions with an arcuate surface provided at each end of said spherical rolling portion, wherein said spherical end portions have curvature centers located on a rotational axis of said spherical rolling portion.
A ball roller comprising a spherical rolling portion with an arcuate surface and spherical end portions with an arcuate surface provided at each end of said spherical rolling portion, wherein a ratio between a maximum diameter of said spherical rolling portion and a distance between two apexes of said spherical end portions falls within a rage of approximately 80%±17%.
Dependencies are inferred from the claim text.