| 摘要 |
PCT No. PCT/FR97/00963 Sec. 371 Date Dec. 2, 1998 Sec. 102(e) Date Dec. 2, 1998 PCT Filed Jun. 3, 1997 PCT Pub. No. WO97/46442 PCT Pub. Date Dec. 11, 1997A spring-compressor device comprises a body having at least two telescopic parts (1, 4, 7) fitted with respective coupling means (2, 9) for jaws (3, 10), and including means internal to the body for controlling lengthening or shortening thereof. The innermost part (7) of the body is constituted by the body of a single-acting actuator whose rod (11) which is secured to the piston (12) of the actuator is fixed to the outermost part (1) of the body and is provided with a duct (14) for feeding the chamber (13) of the actuator whose increase in volume tends to retract the body of the compressor. |
