Land vehicles – Wheeled – Occupant propelled type
Patent
1983-10-17
1987-07-28
Love, John J.
Land vehicles
Wheeled
Occupant propelled type
297 45, 297DIG4, A47C 428, A61G 502, B62M 114
Patent
active
046827838
ABSTRACT:
A foldable wheelchair, which may be moved along a predetermined direction of movement, includes first and second side frames, drive wheels and travelling wheels rotatably supported on the side frames, and a folding mechanism which extends between the side frames, which can be moved between a folded position and an unfolded position, and which, in turn, includes first and second pivoting devices. Each pivoting device may be pivoted about a respective center axis, which extends approximately along the direction of movement, and each pivoting device has ends facing away from its respective center axis. Each side frame defines first and second pivot axes, which extend substantially parallel to the center axes. The ends of the first pivoting device are pivotable about corresponding of the first pivot axes, and the ends of the second pivoting device are pivotable about corresponding of the second pivot axes. The center axis of the first pivoting device, and the first pivot axes are substantially aligned in a first plane, and the center axis of the second pivoting device, and the second pivot axes are substantially aligned in a second plane, when the folding mechanism is in the unfolded position. The pivoting devices may be arrested in the unfolded position, thereby rigidly connecting the side frames to one another.
REFERENCES:
patent: 909411 (1909-01-01), Hockney
patent: 4428594 (1984-01-01), Minnebraker
Hill Mitchell J.
Love John J.
Paratec AG
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