IMPROVED PNEUMATIC AND HYDRAULIC HAMMER FOR SWIFTLY AND ECONOMICALLY INSTALLING REINFORCED CONCRETE PILES

摘要

The invention concerns a pneumatic and hydraulic hammer (21) that can, among other applications, be fitted to a hydraulic shovel excavator or backhoe machine. The hammer can be used to insert reinforced concrete piles swiftly and economically into the ground. The invention also claims a slide (25) for holding the hammer in position. The invention also proposes a pile particularly well suited to being inserted by the proposed hammer. The hammer consists of a cylinder in which a driving hammer slides and a simple and robust system for anchoring and releasing the rod of a hydraulic ram that lifts the swinging mass of the driving hammer in a cyclic manner. The oil supply (30) is provided from the hydraulic system of the shovel.