Integrated cutter, breaker and haulage drive gearcase
US4465319A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 8, 1982 |
| Grant date | Aug 14, 1984 |
| Priority date | — |
| Expiry date | Dec 8, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C31/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A longwall coal-mining machine has a gearcase at each of its ends, each gearcase carrying two ranging arms respectively mounting a cutter drum and a lump breaker, and also carrying a haulage drive. Each gearcase comprises a casing having therein first and second co-axial and mutually-spaced transverse horizontal shafts projecting through opposite sides of the casing driven by individual transmissions located in the gearcase and from an electric motor and a hydraulic motor, respectively, both outside the casing. Rotation of the second shaft drives the mining machine along a longwall face. Rotation of the first shaft actuates a cutter drum through a gear train and also actuates a lump breaker through a gear transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.