Patent ID: 6341946
Filing Date: 2002-01-29
Classification: B62M,F04B,Y10T

Abstract:
An adjustable crank pedal apparatus, comprising:at least one pedal crank; a pedal arm assembly, coupled to the at least one pedal crank, for telescoping to a length; an actuating mechanism, coupled to said pedal arm assembly, for lengthening and shortening the length of said at least one pedal crank, to selectively and controllably adjust a stroke length of said at least one pedal crank, a second adjustor shaft for a second pedal arm assembly, wherein said pedal arm assembly comprises a first pedal arm assembly including a first adjustor shaft; an adjustor sync shaft for linking together said first and second adjustor shafts of the first and second pedal arm assemblies, such that the first and second pedal arm assemblies turn to lengthen or shorten the stroke of the at least one pedal crank in unison, wherein said actuating mechanism includes a crank tube assembly having a crank tube for linking together said first and second pedal arm assemblies via a drive shaft in said crank tube such that said first and second pedal arm assemblies rotate in unison and adjust said stroke length, wherein pedal arms of said first and second pedal assemblies are linked by the drive shaft, and rotate at a same rate as the adjustor style sync shaft such that substantially no rotational force is applied against the adjustor shafts and such that the stroke length remains constant, and wherein said crank tube assembly includes: a shifter cam; a pivot gear mounted on said shifter cam; and a sync gear fixed on the adjustor sync shaft, wherein, responsive to actuation of an external cable, the shifter cam engages said sync gear.