Patent ID: 7361109

Claim:
A bicycle gear assembly, comprising: (a) first and second sets of co-journalled cog wheels, each having at least three cog wheels of various sizes including a largest cog wheel and a smallest cog wheel, oriented so that said largest cog wheel of said first set is aligned with said smallest cog wheel of said second set, thereby forming a first pair of cog wheels, and a cog wheel adjacent to said largest cog wheel of said first set being aligned with a cog wheel adjacent to said smallest cog wheel of said second set, thereby forming a second pair of cog wheels; (b) a chain mounted about one of said pairs of cog wheels; (c) a gear changing assembly adapted to move said chain from said first pair of cog wheels to said second pair of cog wheels; (d) wherein said gear changing assembly moves said chain from said first pair of cogwheels to said second pair of cogwheels by first moving said chain to a first cog wheel of said second pair of cogwheels and then moving said chain to a second cog wheel of said second pair of cog wheels; and (e) wherein said cog wheel sets are moved relative to one another so that when said chain is mounted on said first cog wheel of said second pair of cog wheels and is also mounted on said second cog wheel of said first pair of cog wheels, said two cog wheels upon which said chain is mounted are aligned.