Stair climbing device
US7980337B2 · kind B2 · utility
4Cited by
7References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2007 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | May 28, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62B2301/256
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention provides a device for safely and conveniently conveying an object on a slope. The safety feature includes a fail-safe one-way brake comprising a ratchet wheel, a pawl and a biasing means. In one embodiment, the device is foldable; in another embodiment, the device is integrated with a suitcase; in yet another embodiment, the device is motorized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.