Electric motor driven tool for orthopedic impacting

A surgical impactor for striking an object with a repeatable, controlled contacting force to impel the operation of a surgical implement in opposing directions, the impactor comprising:

• means for driving the impactor with a gas spring assembly, the gas spring assembly including a gas spring piston;
• a control circuit configured to control storage and release of energy, of the means for driving, to an energy storage device to produce the repeatable, controlled contacting force;
• an implement mount configured to receive a surgical implement;
• and
• a moving body operable to contact at least two distinct impact surfaces based upon the repeatable, controllable contacting force delivered thereto to provide the repeatable controlled contacting force to the implement mount, the provision of the repeatable, controllable contacting force to a first impact surface being configured to impel the implement mount in a first direction, the provision of the repeatable controllable contacting force to a second impact surface being configured to impel the implement mount in a direction opposite the first direction.

A surgical impactor, comprising:

• an adapter configured to releasably connect to a surgical end effector;
• a striker;
• a cam;
• a motor configured to be actuated and thereby cause movement of the cam, the movement of the cam being configured to cause the striker to move and communicate a force to the adapter, thereby causing the adapter to communicate a force to the surgical end effector releasably connected to the adapter;
• and
• a mass releasably coupled to the striker, wherein the movement of the striker is configured to cause movement of the mass such that the mass impacts an impact surface to communicate the force to the adapter.