Systems used to move loads as opposed to those aimed at reducing the friction under the load are described. The hydranautics components used in the systems outlined are the gripper-jack, the trans-lift and the chain-jack. The gripper-jack operates by moving a jacking cylinder relative to a locked gripper. The gripper is then unlocked, moved up to the load and the process repeated. Multiple jack systems have been produced capable of moving ships or other structures weighing up to 15,000 tons. The trans-lift is a walking beam system transporting heavy loads without the use of ways or tracks. The unit has two sets of feet; the outer feet support the load whilst the raised inner foot is moved forward relative to the fixed outer feet, then the raised outer feet are moved forward together with the load. Units of this type can be grouped together under a large load, or used as a tractor to tow loads up to 50,000 tons on rollers. The chain-jack is a double-acting hydraulic jack which climbs or hoists a moving chain using latches that can be alternatively engaged and disengaged with successive chain links. The hydraulically actuated latches are interlocked so that one latch set cannot be disengaged unless the other set is engaged. Combined systems can raise loads up to 2200 tons.

  • Corporate Authors:

    Kalerghi Publications

    51 Welbeck Street
    London W1,   England 
  • Authors:
    • Peters, B
  • Publication Date: 1977-1


  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00170411
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Analytic
  • Files: ITRD, TRIS
  • Created Date: Mar 7 1978 12:00AM