Variable ratio transmission

Details Variable ratio transmission Variable ratio transmission

B - Operations, Transporting

62

M

74/32

B62M 25/00 (2006.01) B62M 9/08 (2006.01)

Patent

CA 1199821

ABSTRACT A variable ratio transmission having a variable sprocket, particularly suitable for bicycle transmission, said variable sprocket comprising a drive flange and an indexing flange mounted on an axle with a pair of sprocket- segment-planets and at least two idler-planets sandwiched between said flanges forming a relatively rigid variable sprocket, the planets adapted to expand and contract in response to a relative rotation of the flanges and thereby change the effective diameter of the variable sprocket.

413260

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