Device for a rapid positioning of a heavy carriage
US5267478A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 1992 |
| Grant date | Dec 7, 1993 |
| Priority date | — |
| Expiry date | Aug 10, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19623
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A device for the rapid precision positioning of a heavy carriage employs stationary positioning bar, for instance a part of a linear electric motor or a gear rack, and a cooperating moving part of the linear motor or a motor attached to the carriage. The carriage is rapidly and roughly displaced with a further drive which may be constituted by a further gear wheel that cooperates with a gear rack and is driven by a separate motor attached to the carriage. This further drive additionally delivers a certain force for the final positioning in such a way that the play between the gear wheel and the gear rack is eliminated by biasing. Instead of a second gear wheel together with its motor a toothed belt, also driven by a separate motor, a pneumatic cylinder or a linear motor may be used. These are mounted separately from the carriage and ar principally fixed in space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.