B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
B62M1/00—Rider propulsion of wheeled vehicles
B62M1/24—Rider propulsion of wheeled vehicles with reciprocating levers, e.g. foot levers
B62M1/28—Rider propulsion of wheeled vehicles with reciprocating levers, e.g. foot levers characterised by the use of flexible drive members, e.g. chains
Belt mechanism for e.g. bicycle, has levers receiving belt driving force applied by user, and having link point for connection to belts driven on pulleys joined to free wheel, where belts are maintained at constant tension by return spring