A welling machine of wells. (Machine-translation by Google Translate, not legally binding)

摘要

A well digging machine comprising a vertical rod, movable by a guide in the axial direction, and carrying a spoon with two jaws, characterized in that each ladle jaw is drawn with the general configuration of a quarter of a spherical shell, each having a lower digging edge and an upper trailing edge, said jaw portions being interconnected by pivots having a common axis, said jaw portions being drawn such that in the closed position the trailing edges together form a first circle concentric with the shank, while in the open position the digging edges essentially coincide with arc portions of a second circle, equally concentric with the shank, said arc portions being linked by two parallel lines forming cords in said second circle, and are arranged at a mutual distance corresponding essentially to the diameter or the first circle. (Machine-translation by Google Translate, not legally binding)