Wheel assembly of luggage
US6322156A · kind A · utility
28Cited by
2References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 24, 2000 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Feb 24, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60B37/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A wheel assembly of luggage comprises a hollow cylindrical bearing for wheel of luggage wherein the bearing is of durable and has a lubrication nature. The hollow cylindrical bearing is further employed in conjunction with two short hollow shafts for prevention a rotational friction between metal axle and wheel to significantly decrease the heat generated between metal axle and plastic wheel when operated, thereby obtaining a number of advantages such as quiet in use, no wheel deformation, reduction in manufacturing cost, and ease of assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.