Method for driving a wheeled carriage
US7007765B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2004 |
| Grant date | Mar 7, 2006 |
| Priority date | — |
| Expiry date | Apr 28, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A powered wheeled carriage includes a patient support and a wheeled base. An auxiliary wheel mechanism includes an auxiliary wheel spring support for biasing an auxiliary wheel into contact with a floor. Operating a control apparatus moves the auxiliary wheel away from the floor. A drive handle pivots about a single axis to control a drive motor that powers the auxiliary wheel. The drive handle controls driving of the wheeled carriage in forward and rearward directions. A decision/drive circuit ramps the speed of the wheeled carriage for a few second after start-up to prevent a jerking motion. A display/control panel displays the condition of the carriage brake and the condition of the auxiliary wheel to assist an operator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.