Abstract: A grab or the like substantially comprising a frame or upper structure having for each grab bucket pivoting levers, at the end of which there is positioned the pivot point of a grab bucket, while each grab bucket can furthermore be pulled by means of a rope to the opened position and via a lever system connected to a pulley block movable in the frame, into the closing position, whereby each grab bucket is connected through a pair of levers to a pulley block such that, in the opened position of the grab buckets, this can form an angle of 180.degree., while the grab buckets, in an intermediate position of the movable pulley block, sealingly abut against the lower and side boundary edges.

Abstract: A mechanical grab consisting essentially of a frame within which round-bottomed scoops with straight-walled sides can be rotated about an axis in such a manner that, when the grab shuts, the mutually facing walls of the scoops are upwardly movable in overlapping relationship while the relative speed with which each of the scoops rotates about its axis is different.