HYDRAULIC ACCUMULATOR, HYDRAULIC IMPACT DEVIDE AND PRESSURE LIQUID ACCUMULATING METHOD

摘要

An hydraulic impact device for example a jack hammer has an hydraulic accumulator in the form of a tube (34) of glass fibre reinforced epoxy. The tube is coaxial with the hammer piston (16). The elasticity of the tube and the resulting forces in the tube itself provide for the accumulating capacity. Thus, there is no spring but the wall itself.