Caster with D-shaped stem
US5813090A · kind A · utility
13Cited by
9References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1997 |
| Grant date | Sep 29, 1998 |
| Priority date | — |
| Expiry date | Jan 22, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60B33/0002
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A caster with a stem generally cylindrical over most of its external circumference, but provided with at least one flat face cut through the cylinder external circumference so as to provide the cylinder with a slight "D" shaped cross section. The stem is designed to seat in a corresponding "D" shaped bore hole of a mobile platform, the shapes cooperating to secure the stem against rotation. The stem is internally threaded, and can fit into either cylindrical or "D" shaped bore holes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.