Apparatus for hauling coal through a mine
US5370218A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1993 |
| Grant date | Dec 6, 1994 |
| Priority date | — |
| Expiry date | Sep 17, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G21/02
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A coal haulage apparatus is provided for use in moving coal fragments within the horizontal shafts of a coal mine on a belt conveyor that runs longitudinally along the apparatus. The apparatus is an assembly of multiple, like sections that each have a pair of longitudinal rails and cross members which join the rails together in a parallel, spaced-apart relationship, of which the rails are designed to receive the bottom portion of V-grooved wheels of a dolly that can move longitudinally along the top of each section of the coal haulage apparatus. The longitudinal rails essentially act as the frame that supports the vertical weight of the dolly which rolls along the top of each section of the coal haulage apparatus, and a separate vertical support frame is not required. The rails are made of square tubing that uses a smaller mating, connecting tube to join rails from one section to another adjacent section. The connecting tube is oriented such that the allowable deviation between sections in the vertical direction is much greater than the allowable deviation in the horizontal direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.