| 摘要 |
1,244,370. Percussive tools. ATLAS COPCO A.B. 17 Dec., 1968 [27 Dec., 1967],No. 59864/68. Heading B4C. A percussive tool in which hammer blows are imparted to an implement 4 by a piston 2 driven by a pressure fluid comprises a retainer for the implement. The retainer includes a conical sleeve 9 of a resilient material, e.g. rubber which has inwardly directed flanges 11 and 17. The flange 11 engages a groove 12 in the tool body. A split ring of spring steel or a continuous ring 13 may be used to increase the grip of the sleeve on the body. The retainer is initially positioned on the body and an implement is introduced into the tool by pushing the shank end 6 and collar 5 through an opening 22 in a steel ring 19 and an opening 18 in the sleeve. A slit 15 may be provided to ease the placing of the implement in the tool. The ring 19 is removed when it is desired to remove the tool. In an alternative embodiment (Fig. 3, not shown) upwardly directed lugs on the tool body engage with apertures in the sleeve. A skirt (30), (Fig. 4, not shown) may extend upwardly from the ring, and may be integral with or separate from the ring. |
