Proof that calf contractions cannot augment pressure on the...

Proof that contraction of the calf cannot increase pressure...

Proof that the contraction of the calf cannot increase...

Propulsion and speed change mechanism for lever propelled...

Propulsion mechanism with two independent actuators

Propulsion system for a man powered vehicle and the like

Propulsion system for a scooter

Propulsion system for a snow going device

Propulsion unit for skiers

Pulling type driving mechanism for a vehicle

Quick-release clipless pedal

Quick-release clipless pedal with two cleat engaging sides

R3r three-wheel vehicle and concentric intermediate sprocket...

Rear derailleur for bicycle

Rear derailleur with a shock absorber disposed between a...

Rear drive assembly for a snow bicycle

Recumbent cycle with a single stroke linear pedaling system

Reversible drive device for bicycles

Ride-on vehicle with direction responsive mechanism

Riding-type vehicle