Ships screw and rudder removal apparatus

Abstract

The present disclosure is directed to an apparatus for removing or replacing ships underwater parts such as a screw from the propulsion shaft or the rudder of a ship in a dry dock and transporting it from the ship to a work area. It has a mobile vehicular frame and a pair of spaced apart main cylinder ram lifts pivoted at their base to the vehicular frame, one lying to each side of the ships part either screw or rudder to be removed. The part receiving and cradling apparatus is mounted at the upper ends of said main cylinder ram lifts. Auxiliary tilt cylinders and rams each having one end pivoted to said vehicular frame and the other end pivotally connected to tilt the main cylinder and ram lifts toward and away from the ships part to be removed from or replaced on the ship. Hydraulic apparatus is carried by said vehicular frame for raising and lowering the vehicular frame upwardly toward and downwardly away from the ship and hydraulic apparatus for longitudinally shifting said vehicular frame forwardly or rearwardly along the major axis of the ship is provided to align the part receiving apparatus therewith and to remove it.

Dependencies are inferred from the claim text.