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US 10,441,484 B2Granted
Wheelchair
AssigneeSwany Corporation
InventorTsukasa Itano
Life of this patent
Estimating the term…
Abstract
A wheelchair is provided which includes a body, and driving wheels arranged on the both sides of the body. The wheels include a rim portion, a hub portion, an hand rim, and fastening members. A tire is attached to the outer peripheral part of the rim portion. The hub portion is arranged at the center of the rim portion and coupled to the rim portion by connecting members. The hand rim is arranged along the rim portion on the exterior side of the rim portion. The fastening members fasten the hand rim to the rim portion. An insertion prohibition spacing is formed between the rim portion and the hand rim. The spacing has a distance capable of prohibiting insertion of user's thumb into this spacing.
Claims10
A wheelchair comprising:
- a wheelchair body that includes a seat;
- and
- driving wheels that are arranged on the both sides of the wheelchair body, and can be rotated by hand to propel the wheelchair,
- wherein each of said driving wheels includes:
- a rim portion that holds a tire on an outer peripheral part of the rim portion;
- a hub portion that is arranged at the center of said rim portion and coupled to said rim portion by connecting members, and can rotate with respect to said wheelchair body;
- an annular hand rim that is arranged along said rim portion on an exterior side of said rim portion;
- and
- fastening members that fasten said hand rim to said rim portion,
- wherein said driving wheels can be rotated by pushing forces applied to said hand rims by hand,
- wherein said hand rim is arranged in proximity to said rim portion so that an insertion prohibition spacing is formed between said rim portion and said hand rim,
- wherein said insertion prohibition spacing is less than or equal to a distance of 15 mm,
- wherein said connecting members are spokes, and said spokes are spaced at a constant interval away from each other in the circumferential direction and couple said hub portion to an inner peripheral surface of said rim portion,
- wherein said fastening members are arranged at a midpoint between the spokes adjacent to each other on the inner peripheral surface of said rim portion, respectively,
- wherein said hub portion includes a pair of flanges that are arranged on the interior and exterior sides of said driving wheel, respectively, and said spokes are coupled to said flanges,
- wherein said spokes include first and second sets of spokes which are coupled to the first and second flanges, which are arranged on the interior and exterior sides of said driving wheel, respectively, and the first and second sets of spokes are alternately arranged,
- wherein said first set of spokes are shorter than said second set of spokes, and
- wherein said rim portion is offset inward relative to a center plane of said hub portion.
15 more elements
A wheelchair comprising:
- a wheelchair body that includes a seat;
- and
- driving wheels that are arranged on the both sides of the wheelchair body, and can be rotated by hand to propel the wheelchair,
- wherein each of said driving wheels includes
- a rim portion that holds a tire on the outer peripheral part of the rim portion,
- a hub portion that is arranged at the center of said rim portion and coupled to said rim portion by connecting members, and can rotate with respect to said wheelchair body,
- an annular hand rim that is arranged along said rim portion on the exterior side of said rim portion, and
- fastening members that fasten said hand rim to said rim portion,
- wherein said driving wheels can be rotated by pushing forces applied to said hand rims by hand,
- wherein said hand rim is arranged in proximity to said rim portion so that an insertion prohibition spacing is formed between said rim portion and said hand rim,
- wherein said insertion prohibition spacing is less than or equal to a distance of 15 mm,
- wherein the position of said hand rim can be adjusted in the width direction of the wheelchair by said fastening members,
- wherein each of said fastening members includes
- a fastening arm that has a first end which is fastened to said hand rim and a second end which is fastened to the inner peripheral surface of said rim portion, and
- a fastener that fastens said second end of said fastening arm to the inner peripheral surface of said rim portion, and
- wherein said fastening arm has a plurality of through holes in said second end, and said fastening arm is fastened to said rim portion by said fastener which passes through one of said through holes, and the one of said through holes is selected to adjust the position of said hand rim.
13 more elements
Dependencies are inferred from the claim text.