Patent ID: 6305485
Filing Date: 2001-10-23
Classification: B62M

Abstract:
A mounting and gearing system for power-assisted bicycles comprising(a) top mounted rear brake posts on a bicycle,(b) a system frame mounted on said top mounted rear brake posts,(c) said system frame comprising a slotted portion to compensate the varying widths of said top mounted rear brake posts, an arm extending downward to attach to an axle clamp, and a loop extending up and above a wheel of said bicycle,(d) an electric motor, with square flanges at both ends, mounted on said system frame whereby one of the corners of said square flanges pivots on said loop,(e) an extension arm mounted on said electric motor,(f) a primary drive residing around said extension arm comprise a motor pulley on said electric motor connected to a clutch pulley on said extension arm, via a belt,(g) said extension arm is adjustable in reference to said electric motor so that the tension of said belt can be adjusted,(h) said clutch pulley is mounted to a shaft containing a freewheeling clutch,(i) said shaft rides on bearings supported by said extension arm,(j) a secondary drive residing on one end of said extension arm, opposite said electric motor, and said wheel,(k) a clutch sprocket is mounted to said freewheeling clutch that is connected to a sprocket mounted to said wheel, via a chain,(l) a strut mounted to said extension arm and said system frame is adjustable so that the tension of said chain can be adjusted.