Abstract: A rock lifting device having an elongated shaft and at least two feather members. A pair of wedge surfaces are formed on the outer surface of the shaft adjacent its bottom end. The top end of each of the wedge surfaces is located farther inwardly from the outer surface of the shaft than its bottom end of the wedge surface. The wedge surfaces are substantially planar. Each of the feather members has a shank portion, an arm member extending outwardly from its top end, and a wedge portion extending from the bottom end of the shank portion. The wedge portion has a wedge surface upon its inner face. The wedge surfaces of the feather members mate with the wedge surfaces of the shaft. A transversely extending bore hole passes through the top of the shaft and a clevis attached to a chain may be secured thereto. There is also structure for securing the feather members to the shaft.

Abstract: A rock splitting attachment for a breaking hammer comprising a primary shaft and an elongated primary wedge assembly that is telescopically attached to the primary shaft. The primary shaft has a plurality of principal wedge surfaces on its outer surface adjacent its bottom end. The structure for telescopically attaching the primary shaft to the elongated primary wedge assembly comprises a bore in the primary shaft extending axially inwardly from its bottom end and a secondary shaft that forms a part of the elongated primary wedge assembly. The width of the secondary shaft is smaller that the width of the bore so that it may be telescopically received therein. The secondary shaft has an external groove extending axially along a substantial portion of its length. A set screw is threadably seated in the primary shaft so that it extends radially inwardly far enough into the primary shaft that it extends into the external groove of the secondary shaft.