Patent ID: 7513692

Claim:
Roller device comprising: an outer race ( 12 ), an inner race ( 14 ), said outer race and said inner race being mutually rotable, at least two rows of first and second free rotable rolling parts ( 16 ), ( 18 ), disposed between said outer race ( 12 ) and said inner race ( 14 ), said first free rotable rolling parts ( 16 ) are disposed around said inner race ( 14 ) and being in engagement with said inner race ( 14 ), said second free rotable rolling parts ( 18 ) are disposed between said outer race ( 12 ) and said first rolling parts ( 16 ) and being in engagement with said outer race ( 12 ) and with said first free rotable rolling parts ( 16 ), in which said outer race ( 12 ) and said inner race ( 14 ) are disposed with eccentricity and said outer race ( 12 ) and said inner race ( 14 ) being mutually movable in direction providing the variation of said eccentricity for attainment slack-free engagement between said races and said free rotable rolling parts and between said first and second free rotable rolling parts.