B - Operations – Transporting – 66 – F
Patent
B - Operations, Transporting
66
F
254/125
B66F 3/46 (2006.01) B66F 1/08 (2006.01) B66F 3/24 (2006.01) E02B 17/08 (2006.01)
Patent
CA 1171401
Propulsive-force jack installation for producing the continuous move- ment of an oblong object in the direction of its axis and/or for moving an element along said object ABSTRACT OF THE DISCLOSURE The invention provides a propulsive-force jack installation for producing the continuous movement of an oblong object (1) in the direction of its axis and it is characterized in that it comprises two jack assemblies whose pistons (6, 6') work in seesaw fashion, a piston (6) of one assembly taking in charge said object (1) as soon as the piston (6') of the other assembly ceases this action, offload movement of the piston (6 or 6') and its locking on the object (1) being controlled automatically just before the arrival at the end of travel under load of the other piston (6' or 6) and the offload descent of one piston (6 or 6') being controlled automatically at a time which follows the beginning of the taking in charge of the object by the other piston (6' or 6). The invention may be applied to hoisting self-raising prospection or working platforms at sea.
391836
Compagnie Francaise D'entreprises Metalliques
Fetherstonhaugh & Co.
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