Caster
US8375515B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2011 |
| Grant date | Feb 19, 2013 |
| Priority date | — |
| Expiry date | Sep 6, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60B33/0028
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A caster has a ring-shaped main body, two ring-shaped wheels provided on both side end parts of the main body and two ring-shaped holders by which the two ring-shaped wheels are rotatably fitted on the main body. Each of the wheels has a first sliding face on an inner side of an inner circumferential part and a second sliding face on an outer side thereof. A first dry bearing is provided between an outer circumferential face of a ring-shaped flange provided on each of the both side end parts of the main body and the first sliding face, a second dry bearing is provided between an outer circumferential face of a ring-shaped flange provided on an outer end part of each of the holders and the second sliding face. The caster provides a high mechanical stability, durability, impact resistance and heat resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.