Abstract: A shield arrangement, breaking hammer and method of protecting body of a breaking hammer is provided. The shield arrangement includes a shield element, which is mounted to the body by means of a separate sleeve-like element passing through an opening of the shield element. The sleeve-like element is a tool bushing, which also provides support for a breaking tool.

Abstract: A pressure accumulator, rock breaking machine and method of storing pressure energy. The accumulator includes a casing and an elastic membrane arranged inside the casing. The membrane divides an inner space of the casing into two separate pressure spaces. A gas space is prefilled with pressurized gas. On the opposite side of the membrane is a hydraulic space for receiving hydraulic fluid. The membrane is a hat-like element having side walls, a mounting flange at its open end and a closed top end. The mounting flange of the membrane is mounted between the casing and a flange element. The accumulator is without a screen. The flange element is provided with a sealing for sealing a piston.