Universal electric wheeled chair
US4941540A · kind A · utility
Inventor
Key dates
| Filing date | Feb 28, 1989 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Feb 28, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S180/907
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A lightweight universal electric wheeled chair is formed of hollow tubular frame members. The seat is preferably cantilevered from rear frame members. The frame includes two lower side frame members, each of which has relatively small wheels mounted at both ends. The frame also includes two rear frame members, pivotally connected together intermediate their ends to form an "X" configuration with the lower ends of each of the rear frame members being pivotally secured to the rear ends of the lower side frame members. The front of the two lower side members are coupled together using two frame members and linear bearings intercoupling the two frame members to permit adjustment and collapsing of the wheeled chair. Two upper side members extend forwardly from the rear of the wheeled chair, and are secured to the rear frame members. A seat may be supported directly on these two upper side frame members or the two upper side frame members may serve as arms for the wheelchair, with the seat being slung from these arms at a lower position. Motor and gearing arrangements are provided for varying the distance between the two side members to change the height of the seat. When the lower side …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.