Patent ID: 7137929

Claim:
An improved fitness bike, comprising: a base including a first support rod disposed proximate to a front end thereof; a handle support rod pivotally coupled to said first support rod and movable back and forth at an upper end thereof, said handle support rod having a handle at said upper end; a second support rod disposed proximate to a rear end of said base, said second support having a passive pulley disposed at an upper end thereof; a bottom bracket shell disposed between said first support rod and said second support rod by a support arm; an active pulley disposed at said bottom bracket shell and having left and right cranks with the same axis, each said left and right cranks respectively having a pedal at an end thereof; a transmission belt disposed between said active pulley and said passive pulley, said passive pulley having axle; a transverse rod coupled to said handle support rod and a saddle support rod at front and rear ends respectively, said saddle support rod having a saddle at an upper end thereof; a driving stand installed at a lower end of said saddle support rod; and a link rod disposed between said driving stand and said axle of the passive pulley, whereby when an exerciser steps on said pedal, said active pulley transmits a driving force to said passive pulley, said link rod on said axle of said passive pulley drives said saddle support rod to move up and down, and said saddle support rod, said saddle, said transverse rod, said handle support rod, and said handle simultaneously produce continuous up-and-down and back-and-forth vibrations and shaking movements.