Patent ID: 8657028

Claim:
An impact hammer, comprising: a spindle adapted for rotational movement; a swing arm comprising a first end and a second end, the second end opposite the first end, the first end rotatably coupled to the spindle such that the rotational motion of the spindle is transferred to the swing arm, the swing arm further comprising a contact bushing extending essentially perpendicularly from the second end of the swing arm into a linear path of an anvil; the anvil comprising a contact surface adapted to contact the swing arm such that rotation of the swing arm causes the anvil to move in a first direction along the linear path; and a piston operatively coupled to the anvil to follow the linear movement of the anvil, the piston adapted to interact with an energy storage medium when the swing arm moves the anvil in the first direction, thereby causing energy to be stored in the energy storage medium; wherein continued rotation of the swing arm causes the swing arm to lose contact with the contact surface, thus allowing the energy storage medium to urge a cylinder and the anvil in a second direction opposite the first direction.