US 12,414,884 B1Granted

Tiltable wheelchair

AssigneeKi Mobility

InventorsRichard E. Schneider, Alan Ludovici, Thomas J. Whelan, Murray G. Slagerman

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Abstract

A tiltable wheelchair comprises a tilt seat guide assembly supported in relation to a base frame and a first roller supported in relation to the tilt seat guide assembly for supporting a seat frame for movement in relation to the base frame. The first roller is movable along the tilt seat guide assembly in fore and aft directions to enable tilt of the seat frame in relation to the base frame. A link arm may be connected between the base frame and seat frame to urge the seat frame upward and rearward to tilt the seat frame as the first roller moves in a forward direction. A second roller may be provided to cooperate with a guide rail, which is supported in relation to the tilt seat guide assembly, so as to track the movement of the first roller and prevent lateral translation of the seat frame in relation to the base frame. A locking device may be provided for holding the seat frame in a desired position.

Claims10

Dependent claims

A tiltable wheelchair comprising:

a base frame,
a seat frame,
a tilt seat guide assembly, and
a first roller supported for movement in relation to the frame tilt seat guide assembly for supporting the seat frame in relation to the base frame,
wherein the first roller is moveable along the tilt seat guide assembly in fore and aft directions to enable tilt of the seat frame in relation to the base frame,
wherein the first roller moves along a path of travel in relation to the tilt guide assembly when moving the seat frame in relation to the base frame between the non-tilted and tilted positions, wherein the path of travel has an initial gradient that is steeper with a smaller radius during initial movement of the seat frame the non-tilted position and then becomes more gradual with a larger radius along the path of travel as the seat frame continues of be tilted, which results in a demand for less force to tilt the seat frame from the non-tilted position, and
a cross-frame assembly, wherein the base frame comprises laterally spaced side frames, the cross-frame assembly being connected between the side frames the cross-frame assembly being moveably connected to the side frames so as to be foldable to enable the side frame to move toward one another to fold the wheelchair.

4 more elements

A tiltable wheelchair comprising:

a base frame,
a seat frame,
a tilt seat guide assembly,
a first roller supported for movement in relation to the frame tilt seat guide assembly for supporting the seat frame in relation to the base frame, and
wherein the first roller is movable along the tilt seat guide assembly in fore and aft directions to enable tilt of the seat frame in relation to the base frame, and
wherein the tilt seat guide assembly comprises an upper guide member and a lower guide member in vertically spaced relation to one another, and each comprising a roller surface, which are opposingly directed toward one another, and which define an arcuate space therebetween, and which cooperate with the first roller throughout movement of the first roller within the arcuate space, and
wherein the lower guide member has a variable pitch arcuate path with an initial slope that is steeper with a first radius during initial movement of the seat frame from a non-tilted position and then becomes more gradual with a second radius, which is larger than the first radius, along a path of travel as the seat frame continues of be tilted, which results in a demand for less force to tilt the seat frame from the non-tilted position.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/833,646Filed 6 Jun 2022 · us provisional application
Priority: 4 Jun 2021
Granted: 16 Sep 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

A61G 5/1075
Arrangements for adjusting the seat: tilting the whole seat backwards
A61G 5/0883
Foldable: having locking means for maintaining a folded or unfolded condition
A61G 5/1054
Parts, details or accessories: large wheels, e.g. higher than the seat portion
A61G 5/12
Parts, details or accessories: rests specially adapted therefor, e.g. for the head or the feet