| 摘要 |
954,122. Mineral-mining machines. HEELEY (MINING MACHINERY) CO. Ltd. Feb. 15, 1963 [Feb. 22, 1962], No. 6873/62. Addition to 906,023. Heading E1F. The rotary cutter drum of the referred to parent Specification is modified in that the sockets 26 of the cutter pick boxes 24 of the drum are of tapered configuration. Orientating rods 42 secured to the pick body co-operate with projections 46 on a pick box to cause correct orientation of a pick 30 when entered into the box. |
