| 摘要 |
1,149,220. Shovelling machines. F. J. HAYNES. 6 Dec., 1966 [20 Dec., 1965], No. 54568/66. Heading E1F. Detachably secured to the bottom 40 of an excavator bucket 34 is a casing 48 containing a motor 64 and a crank drive 70, 78 for reciprocating digger teeth 84 slidably mounted in a bearing block 52 at the front of the casing. |
