Trolley wheel mechanism
US6843349B2 · kind B2 · utility
8Cited by
13References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 2003 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | May 19, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60B33/025
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A trolley wheel mechanism has two caster wheel assemblies each having a pair of wheels mounted on a rotatable housing. In a free mode the wheels are free to both rotate and to swivel. This is caused by the user pressing a release pedal. In a unidirectional mode a retainer lock engages a brake disc to prevent swivelling of the housing. This is caused by the user pressing both pedals simultaneously. A brake mode is caused by the user pressing the apply pedal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.