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US 12,766,056 B2Granted
Suspension system for power wheelchair stander
AssigneeMotion Concepts, LLC
InventorsDavid Ciolfe, David Headrick, Son Ma
Life of this patent
Estimating the term…
Abstract
A wheelchair including a frame and a suspension system. The suspension system may have at least one front caster arm pivotally connected to the frame, a front caster connected to the front caster arm, a first link, and a second link. The first link is pivotally connected to the frame, and the second link is slidably connected to the front caster arm and pivotally connected to the first link.
Claims15
A wheelchair, comprising:
- a frame;
- a suspension system comprising:
- at least one front caster arm pivotally connected to the frame;
- a front caster connected to the front caster arm;
- a first link pivotally connected to the frame;
- a second link pivotally connected to the first link and the front caster arm;
- a first slot and a first pin comprising a first range of pivotal movement between the first and second links, wherein the first slot comprises a first extended portion at a first end of the first slot and a second extended portion at a second end of the first slot;
- and
- a second slot and a second pin comprising a second range of movement between second link and the front caster arm,
- wherein the second pin is configured to move between an upper end of the second slot and a lower end of the second slot, and
- wherein when increased force of a user of the wheelchair is applied against the first link, the movement of the front caster arm is limited in an upward direction.
8 more elements
A wheelchair comprising:
- a user support system comprising a seated position and an elevated position;
- a frame supporting the user support system;
- and
- a suspension system connected to the frame and comprising:
- a front caster arm having a front caster;
- wherein the front caster arm comprises a first range of pivotal movement when the user support system is in a seated position and a second range of pivotal movement less than the first range of movement when the user support system is in the elevated position;
- and
- a plurality of linkages coupled to the frame and the front caster arm and wherein the plurality of linkages comprise a first slot and a first pin connection between a first linkage and the front caster arm and a second slot and second pin connection between a second linkage and the first linkage,
- wherein the first pin is configured to move between an upper end of the first slot and a lower end of the first slot, and wherein user weight applied against the second linkage forces the first and second linkages into contact with the first pin biasing it in a downward direction and impeding upward movement of the first pin.
6 more elements
A wheelchair comprising:
- a user support system comprising a seated position and an elevated position;
- a frame means;
- a suspension means comprising:
- a means for supporting at least one front caster on the frame means;
- a means for allowing the front caster to move a first range of movement when the user support system is in the seated position wherein the means for allowing the front caster to move the first range of movement comprises a first slot having an extended portion and a first pin;
- a means for allowing the front caster to move a second range of movement when the user support system is in the elevated position and wherein the second range of movement is less than the first range of movement, wherein the means for allowing the front caster to move the second range of movement comprises a second slot having an upper end and a lower end and a second pin configured to move between the upper end and the lower end, and
- a means for transferring a portion of the user's weight to the means for supporting the at least one front caster when the user support system is in the elevated position, wherein when the portion of the user's weight is transferred to the means for supporting the at least one front caster, the movement of the means for supporting at least one front caster on the frame means is limited in an upward direction.
4 more elements
Dependencies are inferred from the claim text.