Patent ID: 7909739

Claim:
A pedal exercise machine having an arc trajectory, comprising: a base; a front frame and a center frame provided on the base, the front frame and the center frame being coupled to each other; a pair of pedals to move upwards and downwards in alternating directions; a pedal link for connecting each of the pedals to the base; a pair of arm levers coupled to the front frame so as to be rotatable in alternating directions; a pair of lever link units each having a first lever link coupled at a first end thereof to the corresponding arm lever, and a second lever link connecting a second end of the first lever link to the corresponding pedal, the second lever link being coupled to the pedal by a first shaft that couples the corresponding pedal link to the corresponding pedal; a pair of subsidiary pedal links connecting the pedal to the center frame, each of the subsidiary pedal link being coupled to the corresponding pedal by a second shaft different from the first shaft, through which the corresponding pedal link is coupled to the pedal; a resistance pulley provided in the center frame; a crank having crank arms coupled to the resistance pulley through a crank shaft; a first actuating link integrally coupled to each of the pedal links at a predetermined angle; and a second actuating link rotatably coupled at both ends thereof to the first actuating link and the corresponding crank arm of the crank.