Wheelchair tray

Claim 2

In combination, a wheelchair having a chair, at least one substantially horizontal arm and drive wheels on opposite sides of the chair, and a table assembly, the table assembly comprising: first hinge means mounted on the arm and extending along an outer side of the arm; a table panel having opposite first and second faces and a mounting edge; second hinge means secured to the table panel adjacent the mounting edge of the table panel and having a pivot axis spaced outwardly from the mounting edge, the pivot axis being offset from the table panel so as to be spaced from the second face of the table panel, the second hinge means pivotably and slidably engaging the first hinge means for pivotal movement of the table panel about the pivot axis and for translation of the table along the pivot axis whereby the table panel may move between a first use position extending across the arm with the first face of the table panel uppermost and a storage position substantially below the arm, laterally between the chair and the adjacent drive wheel.

Claim 3

A wheelchair according to claim 1 including abutment means on the first and second hinge means, engageable in the first use position to support the table panel in the first use position.

Claim 4

A wheelchair according to claim 2 wherein the first hinge means comprise an upper bearing means engageable with the second hinge means in the first use position of the table panel and a lower bearing means below the upper bearing means engageable with the second hinge means in the storage position of the table panel.

Claim 5

A wheelchair according to claim 3 including second abutment means on the first and second hinge means, engageable in a second use position of the table panel, in which the table panel projects substantially horizontally outwardly from the arm and the second hinge means engages the upper bearing means for supporting the table panel in the second use position.

Claim 6

A wheelchair according to claim 4 wherein the first hinge means comprise a channel extending along the arm and the second hinge means comprise an elongate shaft engageable in the channel.

Claim 7

A wheelchair according to claim 5 wherein the shaft is rotable in the channel and slideable therealong.

Claim 8

A wheelchair according to claim 1 comprising first and second table panels and table hinge means connecting the table panels for movement between a coplaner extended condition and a superimposed collapsed condition.

Claim 9

A wheelchair according to claim 1 wherein the first hinge means comprise a channel extending along the arm, and the second hinge means comprise an elongate shaft engageable in the channel.

Claim 10

A wheelchair according to claim 8 wherein the shaft is rotatable in the channel and slideable therealong.

Claim 11

A wheelchair according to claim 1 wherein the arm is substantially circular in profile and the first hinge means comprise clamp means for clamping the first hinge means on the arm, the clamp means including first and second clamp components with respective arcuate faces engageable with opposite sides of the arm, and means for drawing the first and second clamp components together.

Claim 12

A wheelchair according to claim 10 wherein the arcuate face of the first clamp component comprises a plurality of arcuate sections with radii of curvature that increase from the center of the arcuate face to its edges.

Claim 13

A wheelchair according to claim 1 including an arm rest, the first hinge means including a flange extending across the arm and means for mounting the arm rest on the flange.

Claim 14

In combination, a wheelchair having a chair, at least one substantially horizontal arm and drive wheels on opposite sides of the chair, and a table assembly, the table assembly comprising: first hinge means mounted on the arm and having first hinge pivot means comprising a channel extending along an outer side of the arm, the channel having a vertically elongate profile with spaced apart upper and lower bearing surfaces; a table panel having opposite first and second faces and a mounting edge; second hinge means including table panel mounting means secured to the table panel adjacent the mounting edge of the table panel, second hinge pivot means with a pivot axis spaced outwardly from the mounting edge and spaced from the second face of the table, the second pivot means comprising an elongate shaft rotatable in the channel, slideable along the channel and vertically moveable in the channel for selective engagement with the upper and lower bearing surfaces for movement of the table panel between a first use position in which the table panel extends across the arm with the first face of the table panel uppermost and the shaft engages the upper bearing means and a storage position in which the table panel is positioned substantially below the arm, laterally between the chair and the adjacent drive wheel and the shaft engages the lower bearing surface to support the table panel in the storage position; first abutment means on the first and second hinge mean, engageable in the first use position to support the table panel in the first use position; and second abutment means on the first and second hinge means, engageable in a second use position of the table panel, in which the table panel projects substantially horizontally outwardly from the arm and the second hinge pivot means engages the upper bearing means for supporting the table panel in the second use position.

Claim 15

In combination, a wheelchair having a chair, at least one substantially horizontal arm and drive wheels on opposite sides of the chair, and a table assembly, the table assembly comprising: first hinge means mounted on the arm and having first hinge pivot means comprising a channel extending along an outer side of the arm, the channel having a vertically elongate profile with spaced apart upper and lower bearing surfaces; a table panel having opposite first and second faces and a mounting edge; second hinge means including table panel mounting means secured to the table panel adjacent the mounting edge of the table panel, second hinge pivot means with a pivot axis spaced outwardly from the mounting edge and spaced from the second face of the table, the second pivot means comprising an elongate shaft rotatable in the channel, slideable along the channel and vertically moveable in the channel for selective engagement with the upper and lower bearing surfaces for movement of the table panel between a first use position in which the table panel extends across the arm with the first face of the table panel uppermost and the shaft engages the upper bearing means and a storage position in which the table panel is positioned substantially below the arm, laterally between the chair and the adjacent drive wheel and the shaft engages the lower bearing surface to support the table panel in the storage position; first abutment means on the first and second hinge mean, engageable in the first use position to support the table panel in the first use position; and second abutment means on the first and second hinge means, engageable in a second use position of the table panel, in which the table panel projects substantially horizontally outwardly from the arm and the second hinge pivot means engages the upper bearing means for supporting the table panel in the second use position.

Claim 16

A wheelchair according to claim 13 including a slot along the channel for passage of the shaft therethrough whereby the second hinge means and the table panel may be removed from and replaced on the first hinge means.

Claim 17

A wheelchair according to claim 14 including resilient finger means projecting into the slot for inhibiting inadvertent release of the shaft from the channel.

Claim 18

A wheelchair according to claim 14 wherein the second abutment means comprise a portion of the second hinge means projecting into the slot in the second use position of the table panel.