Spring powered vehicle

Details Spring powered vehicle Spring powered vehicle

2007-06-26

2007-06-26

Shriver, J. Allen (Department: 3618)

Land vehicles

Wheeled

Tiltable vehicles, stabilized by attendant or article

C298S003000, C185S04000C, C185S039000, C180S212000

Reexamination Certificate

active

10965119

ABSTRACT:
The present invention provides a manually powered drive assembly for a vehicle. A foot crank winds a helical torsion spring through a system of shafts and sprockets in a first direction. By releasing a brake applied to a wheel, or wheels, of the vehicle, the wound spring transfers a rotational movement from a spring shaft to a freewheel sprocket coaxially aligned with the axle supporting a wheel, so that the rotational movement upon the wheel assists a user in manually moving the vehicle. The drive assembly may be advantageously used with a wheelbarrow to assist in building up momentum for moving heavy loads.

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patent: 6820880 (2004-11-01), Benton et al.
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