Land vehicles – Wheeled – Extensible
Patent
1987-01-05
1988-08-09
Mitchell, David M.
Land vehicles
Wheeled
Extensible
280 4721, B62B 112
Patent
active
047623330
ABSTRACT:
A two-wheeled hand truck incorporates an elongate upright frame, mounted by a pair of wheel support brackets to supporting wheels. Handles or other graspable surfaces are provided at the upper end of the frame. The wheel-supporting brackets are pivotally connected to the frame in a manner to permit movement of the wheels from a first load-supporting position in which the wheels are adjacent the lower end of the frame for supporting loads with a relatively lower center of gravity, to a second load-supporting position in which the wheels and axle are moved materially rearward for supporting loads with a relatively higher center of gravity. Yieldable, pressure-exerting mechanism operating through moment arms on opposite sides of the brackets pivots releasably lock the wheel structure in each of its positions.
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Finlay Tamara L.
Magline Inc.
Mitchell David M.
LandOfFree
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