Travel drive for a drawing engine of a one-rail track suspension railroad in mines
US4133267A · kind A · utility
Inventor
Key dates
| Filing date | Jul 19, 1977 |
| Grant date | Jan 9, 1979 |
| Priority date | — |
| Expiry date | Jul 19, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1967
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A travel drive for a pulling engine of a single rail suspended railroad used in mines includes a pair of friction wheels and a pair of toothed wheels each of which is mounted on a common shaft with the respective friction wheels for joint rotation therewith about a vertical axis and for displacement along the common shaft between a retracted position in which the toothed wheel is accommodated in a protective chamber of the respective friction wheel, and a raised position in which the toothed wheel is capable of engaging an indented segment extending along the rail. A double-action cylinder-and-piston arrangement is so operatively connected to the respective toothed wheel as to be capable of raising and lowering the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.