Stair chair
US6435538B1 · kind B1 · utility
48Cited by
53References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1999 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Jul 27, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S280/10
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A stair chair is provided and includes a seat 30, a backrest 34, a foot rest 32, upper handles 84 and lower handles 82. Three wheels 62 are mounted at each side of the chair. The wheels are pivotal about their own axis and also a common axis. Rotation about the common axis can be braked or locked. The chair can be lowered downstairs with a person pulling on the upper handle 84 and another person pushing on the lower handles 82 in order to slow movement of the chair down the stairs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.