Land vehicles – Wheeled – Coasters
Patent
1987-03-30
1988-08-02
Mitchell, David M.
Land vehicles
Wheeled
Coasters
280218, 272114, 297300, 297 5, B62M 2900
Patent
active
047610131
ABSTRACT:
A user propelled vehicle comprises a seat frame, a back pivotally connected to the rear of the seat frame about a first pivot axis and a leg support pivotally connected to the front of the seat frame about a second pivot axis parallel to the first. A support surface engaging roller is provided on each of the seat frame and the leg support. The leg support and the seat frames can rollingly approach and retreat from one another along a floor or other support surface between a contracted position, in which the seat frame extends forwardly upwardly and the leg support extends sharply forwardly downwardly from the seat frame, and an extended position, in which the seat frame extends approximately horizontally and the leg support inclines relatively gently to the frame. A hydraulic linkage is provided for maintaining the vehicle in the contracted and extended positions and for maintaining the back in positions extending sharply upwardly from or relatively gently inclining with respect to the seat frame. In the contracted position, the user's body is firmly retained on the vehicle. The rollers support the vehicle on the floor with the seat frame supported a short distance above the support surface so that the user can propel the vehicle by thrusting on the support surface with synchronous or asynchronous movements of his or her hands. In the extended position the user can relatively easily lift himself or herself onto and off the vehicle.
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patent: 3406772 (1968-10-01), Ahrent et al.
patent: 3970325 (1976-07-01), Wirsig
patent: 4591182 (1986-05-01), Wood
Johnson Brian L.
Mitchell David M.
The Board of Governors of Ryerson Polytechnical Institute
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