| 摘要 |
PCT No. PCT/EP83/00024 Sec. 371 Date Oct. 4, 1983 Sec. 102(e) Date Oct. 4, 1983 PCT Filed Feb. 1, 1983 PCT Pub. No. WO83/02737 PCT Pub. Date Aug. 18, 1983.An apparatus for pressing tubular parts, more particularly for pressing or forcing pipe-unions onto pipes, sleeves or hoses. The apparatus includes a plurality of spring loaded, radially adjustable jaws and an annular piston in operative communication with the jaws. The piston can move hydraulically towards the jaws and can be returned hydraulically to its neutral position. The effective area of the piston, by means of which it is returned to its neutral position, amounts to only a fraction of the piston-area which advances the piston. The end of the piston remote from the jaws engages in an annular hydraulic cylinder, the entire cross-section of the piston which is largest at this end, forming the effective piston-area which advances the piston. |
