Patent ID: 8567280

Claim:
A roller transmission and gearing mechanism, comprising: a driving body, roller means having respective centres or central axes, and a driven body, said driving and driven bodies have different rotational axes wherein said driving body is coupled to said driven body by means of said roller means, said driving and driven bodies are guided for movement having a single degree of freedom, said driving and driven bodies both defining at least one pair of respective roller guide tracks thereon, said at least one pair of roller guide tracks contacting said roller means and determining the relative movement of said roller means with respect to the associated body, said roller means contacting said at least one pair of respective roller guide tracks on said driving and driven bodies along respective rolling curves on each of the driving and driven bodies, said at least one pair of respective roller guide tracks starting and terminating on said driving and driven bodies at respective pairs of limit surfaces, said roller means moving along said at least one pair of respective roller guide tracks, wherein the roles of said driving and driven bodies are interchangeable, wherein distances defined between points of a rolling curve (g 1 ) on said driving body ( 10 , z 1 ) and said respective rolling curve (g 2 ) on said driven body ( 20 , z 2 ) are different, wherein the length of each of said rolling curves (g 1 ) of said driving body ( 10 , z 1 ) is substantially equal to the length of said respective rolling curve (g 2 ) of said driven body ( 20 , z 2 ) between said limit surfaces; and wherein at any moment in operation a roller (G) of said roller guide means contacts said rolling curve (g 1 ) of said driving body ( 10 , z 1 ) at only a single point P 1 which is off center with respect off the center of the respective roller guide track, and contacts said rolling curve (g 2 ) of said driven body ( 20 , z 2 ) at only a single point P 2 , which is off center with respect to the center of the respective roller guide track, diagonally opposite point P 1 , respective tangential planes (E 1 , E 2 ) extending through the respective points P 1 and P 2 are substantially parallel to each other, the velocities (u 1 , u 2 ) of said roller (G) defined in the coordinate system of said roller (G) at points P 1 and P 2 are substantially identical but have opposite signs, at said contacting points P 1 and P 2 the respective action lines of forces (F) acting on said roller (G) intersect the center or central axis of said roller (G), whereby said roller (G) is moved along said at least one pair of respective roller guide tracks ( 12 , 22 ) following entry until leaving said at least one pair of respective roller guide tracks substantially with pure rolling motion.