Wheelchair lift systems
US11730643B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2020 |
| Grant date | Aug 22, 2023 |
| Priority date | — |
| Expiry date | Sep 15, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/8752
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A wheelchair lift system for a vehicle comprises: a platform for accommodating a wheelchair; a lifting arm; a hydraulic circuit including a hydraulic actuator arranged to act on the lifting arm to raise and lower the platform; a barrier mounted on the platform and pivotable between a raised position and a lowered position; a plurality of sensors each arranged to generate a sensor output; a user input device arranged to generate control signals to control operation of the lift; and a control unit. The control unit is arranged to receive the control signals and to receive the sensor output from each of the sensors and to control the hydraulic circuit thereby to control of the lift to perform a number of different operations. The control unit is also operable in a fully operational mode and a safety mode and is arranged to perform a plurality of checks on the sensor outputs, and to record a result of each of the checks, and to switch between the fully operational mode and the safety mode based on the results.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.