Wheelchair, wheel for wheelchair, and method of producing wheel for wheelchair
US7401630B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2004 |
| Grant date | Jul 22, 2008 |
| Priority date | — |
| Expiry date | Nov 11, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60B3/048
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A wheel for a wheelchair according to the present invention includes: an outer wheel or ring mounted on the inner periphery of a tire; an inner ring connected with a wheelchair frame (concentric with the outer ring and positioned inside the outer ring); a plurality of rolling elements interposed between the outer ring and the inner ring, arranged with an interval between each other in a circumferential direction; and a plurality of spacers (retainers or interval-holding members) for holding intervals between the rolling elements. Each spacer is in a shape extending along a circumferential direction of the outer ring and the inner ring, and is provided between the rolling elements respectively. The wheel does not have a hub and spokes, and the inner peripheral side does not rotate, and further the wheel weight is light. The wheelchair of the present invention includes the wheel for a wheelchair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.