Self-propelled trolley and supporting track structure
US4984523A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1988 |
| Grant date | Jan 15, 1991 |
| Priority date | — |
| Expiry date | Dec 7, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B25/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A self-propelled trolley and supporting track structure, the trolley forming a housing for a four wheel drive mechanism which is coupled to a driving motor attached to the housing and to a pair of axles each equipped with a pair of driving and supporting wheels adapted to engage transversely spaced track surfaces of the track structure. The track structure comprises a pair of transversely spaced channel section track members, each having upper and lower flanges terminating in guide surfaces and connected by a vertical web, the guide surfaces of one track member facing the guide surfaces of the other. The track surface are formed by the upper flanges of the track members and the guide surfaces are engageable by pairs of guide wheels appended to the trolley below the housing. A conductor bar assembly enclosed within the track members is engaged by collector shoes attached to the trolley.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.