Motorized wheelchair
US8315770B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2008 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | May 1, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D11/003
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A motorized wheelchair includes left and right drive wheels, left and right motors, rate-of-turn sensor, first and second speed sensors, and controller arranged to combine signals from the sensors in a manner that detects drift. Alternatively, the motorized wheelchair includes left and right drive wheels, left and right motors, first and second rate-of-turn sensors, and controller arranged to combine signals from the sensors in a manner that compensates for voltage offset errors. In another arrangement, the motorized wheelchair includes left and right drive wheels, left and right motors, first and second rate-of-turn sensors, input device, and controller arranged to combine signals from the sensors and input device in a manner that controls the motors using an integrated turn rate error. Several methods for controlling each wheelchair configuration are also provided. These methods process signals associated with desired, expected, or actual turn rate to determine if the wheelchair is off course.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.