Hand truck employing wheel units having multiple wheels
US4312417A · kind A · utility
15Cited by
5References
1Claims
0Family size
Inventors
Key dates
| Filing date | Nov 20, 1979 |
| Grant date | Jan 26, 1982 |
| Priority date | — |
| Expiry date | Nov 20, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62B2205/14
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A hand truck which is especially useful in moving loads up and down stairways can be constructed so as to employ two identical wheel units located adjacent to the lower end and at the back of the body or frame of the hand truck. Each of the wheel units consists of a center hub section and a plurality of arms, each of which carries a rotatably mounted wheel. The wheel units are mounted for rotation about an axis; a motor is provided for simultaneously rotating the wheel units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.