Caster with a shaped stem
US6115882A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1998 |
| Grant date | Sep 12, 2000 |
| Priority date | — |
| Expiry date | Jul 17, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60B33/0002
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A caster with a stem extending upwards from a base and defining a stem axis and wherein the stem has a hole having a circumference defined by an internal threading for fastening to a correspondingly externally threaded fastener; a bearing for interconnecting said base and said stem such that said base is free to rotate about said stem axis; wherein at least a part of the external surface of the upper end of said stem has a shape that inhibits rotation of the stem when inserted into a correspondingly shaped bore hole, wherein said shape is defined by a curved surface or planar surface or a combination thereof; and wherein the curve or planar surface does not intersect the circumference defined by the internal threading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.