Conveying apparatus for ascending or descending stairways
US6550787B1 · kind B1 · utility
4Cited by
8References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2001 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Dec 28, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S280/10
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A conveying apparatus capable of ascending or descending stairways and carrying goods consists of a frame, a transmission mechanism and a driving mechanism located on a lower section of the frame. The transmission mechanism includes a planetary gear set and is with two degrees of freedom. When moving on the floor, the driving mechanism may drive a driving wheel in the transmission mechanism to deliver output of the conveying apparatus based on floor conditions, thereby to ascend or descend the stairways, or moving on the plain floor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.