Adjustable anti-tip wheels for power wheelchair
US7344155B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2005 |
| Grant date | Mar 18, 2008 |
| Priority date | — |
| Expiry date | Oct 14, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S180/907
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A power wheelchair is provided having one or more anti-tip wheels for stabilizing the movement of the frame about the drive wheels. An anti-tip wheel is attached to the end of a suspension arm which is pivotally attached to the frame of the wheelchair. A spring resiliently supports the anti-tip wheel in a neutral position relative to the ground upon which the drive wheels of the wheelchair normal ride. A retaining system selectively fixes position of the anti-tip wheels relative to the frame. The retaining system employs a plurality of teeth, with one portion disposed in combination with said suspension arm, and at least one other tooth disposed for engaging said one portion to provide unidirectional retention of the position of said suspension arm relative to the frame. The engagement of the teeth to lock the position of the suspension arm may be responsive to the torque generated by the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.