发明名称 |
Cutter drum support arm for longwall mining machine |
摘要 |
A support arm for a cutter drum carried on a longwall mining machine characterized in being formed from two telescoping parts, at least one of which is movable axially relative to the other to change the length of the arm. This enables the mining machine to cut material from a coal seam with one support arm length and roadways at opposite ends of the seam face with longer support arm lengths without the necessity for raising the mining machine on its support tracks in the roadway areas or otherwise adjusting the vertical heights of the support arms.
|
申请公布号 |
US4328996(A) |
申请公布日期 |
1982.05.11 |
申请号 |
US19800164441 |
申请日期 |
1980.06.30 |
申请人 |
GEBR. EICKHOFF MASCHINENFABRIK UND EISENGIESSEREI M.B.H. |
发明人 |
JAHN, DIETER |
分类号 |
E21C25/08;E21C27/02;(IPC1-7):E21C27/24 |
主分类号 |
E21C25/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|