Chiropractic percussor apparatus having compact percussion-applying head assembly centrally attached to reciprocatory push rod

What is this patent about?

'260 is related to the field of chiropractic percussor apparatus, which are used to apply repetitive force to the human body for chiropractic treatment. Prior art devices suffered from limitations in the range of motion of the percussion head, restricting the effectiveness of the massaging action.

The underlying idea behind '260 is to improve the range of motion of the percussion head by modifying the way it's coupled to the push rod. Instead of rigidly clamping the diaphragm of the percussion head assembly, the design uses a central attachment point for the contact pad, allowing a wider area of the diaphragm to flex.

The claims of '260 focus on a chiropractic percussor apparatus comprising a main housing, an electric motor with a rotary output shaft, an extension housing, an elongated push rod eccentrically mounted on the motor's shaft, a flexible coupler assembly, and a percussion-applying head assembly that is only centrally attached to the push rod.

In practice, the motor's rotation drives the push rod in a reciprocating and wobbling motion. The flexible coupler, including a diaphragm, allows this motion to be transmitted to the percussion head. The key is that the contact pad is attached only at the center of the push rod's outer end, enabling a larger, more flexible area of the diaphragm to accommodate the push rod's movement.

This design differs from prior approaches where the diaphragm was clamped more rigidly, limiting its flexibility and, consequently, the range of motion of the contact pad. By allowing a wider annular portion of the diaphragm to flex freely, the invention expands the path of motion of the contact pad, resulting in a more effective percussive and massaging action.