发明授权
- 专利标题: Coal breaker combined with longwall drum
- 专利标题(中): 断路器与长壁鼓组合
-
申请号: US48642374申请日: 1974-07-08
-
公开(公告)号: US3907367A公开(公告)日: 1975-09-23
- 发明人: NAKAJIMA SHIGEO
- 申请人: TAIHEIYO COAL MINING CO LTD
- 专利权人: Taiheiyo Coal Mining Co Ltd
- 当前专利权人: Taiheiyo Coal Mining Co Ltd
- 优先权: US48642374 1974-07-08
- 主分类号: E21C27/02
- IPC分类号: E21C27/02 ; E21C27/08 ; E21C25/10
摘要:
A coal cutting machine having a cutting roll and breaking roll installed on a swingable supporting arm. The cutting roll cuts into the face of the coal vein while the breaking roll acts like a mace to smash large unwielding chunks of coal.
信息查询