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A table clamp for removably attaching a table or the like to a
wheel chair has vertically positioned hollow body members that engage
legs on the table, movable inverted L-shaped members having opposed
tabs for engagement against the chair frame are pivoted to the hollow
body members.
A wheel chair hoist assembly for a vehicle having a body and a
roof comprising a transverse support bar within the body secured
to the roof. A mount tube with a depending winch mount bracket is
reciprocably and slidably supported upon the support bar. A tubular
boom, normally positioned within the body, is parallel to and secured
to the mount tube and adapted for sliding projection outwardly of
the body. A power winch having a drum is supported on the bracket
and includes a cable around the drum guidably projected through
the boom with its free end mounting a hook adapted to supportably
engage a collapsed wheel chair. A manual switch is connected to
a power source to energize the winch to elevate the wheel chair,
and the boom is manually projected successively inward transferring
the wheel chair into the body.
In a foldable wheel chair supporting frames for a back, a seat,
a pair of back wheels and a pair of front wheels are mutually pivotally
connected by means of pivot assemblies positioned at the seat-back
junction and comprising a blocking mechanism which is deactuated
for releasing the pivotal connection between the supporting frames
by turning the seat in a direction of a predetermined reduction
of the angular separation between the seat and the back. Each pivot
assembly may comprise a pivot pin secured to one supporting frame,
and pivot cams secured to the other supporting frames together with
an interlocking cam positioned between two of said pivot cams.
An improved step-climbing wheel chair with integral retractable
ramps for ascending or descending a step, curb or the like. The
conveyance is provided with a two-speed transmission capable of
driving the wheel chair on level terrain at conventional speeds
or selecting a low speed high torque capability for driving the
conveyance up an inclined ramp. The invention further contains a
self-leveling chair seat which automatically maintains the occupant
in a level seated position regardless of the inclined position assumed
by the wheel chair frame, thereby contributing to the stability
of the wheel chair and the safety of the occupant.
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