Land vehicles – Wheeled – Occupant propelled type
Patent
1991-08-07
1994-06-21
Tyson, Karin L.
Land vehicles
Wheeled
Occupant propelled type
280233, 2802501, 2803041, B62M 112
Patent
active
053223128
ABSTRACT:
A user-propelled vehicle has a wheelchair embodiment and a three-wheeled skateboard embodiment. In the wheelchair embodiment, a foldable frame has a seat for supporting the user and a propulsor movably attached to the frame for allowing the user to pump the propulsor. The propulsor is engaged with both rear wheels of the wheelchair through independent ratchet-clutch mechanisms for permitting torque to be transferred to one or both wheels when the propulsor is pumped to propel and steer the wheelchair. In the three-wheeled skateboard embodiment, a frame has two wheels mounted in tandem near the front of the frame and a third wheel mounted on the centerline of the frame behind the front wheels. Two pedals are hingedly mounted side-by-side on the frame and are ratchetably engaged with the rear wheel. Each pedal is movable between a thrust position, wherein the front portion of the pedal is raised from the frame, and a rest position, wherein the pedal is flush with the frame. Each pedal is spring-returned to its thrust position. The user can alternately or simultaneously depress the pedals to impart torque to the rear wheel and thereby propel the skateboard.
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Boehler Anne
Tyson Karin L.
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