Patent ID: 7692084

Claim:
A tension unit for a drum set beater having a mounting shell having an inner chamber; a middle; a top face; a bottom face; a mounting hole being formed through the mounting shell from the top face to the bottom face; at least one positioning protrusion being formed on and protruding from the top face of the mounting shell near the mounting hole; and a locking ring being formed on the bottom face of the mounting shell around the mounting hole; a lower locking nut abutting the bottom face of the mounting shell and having a center; an external surface; an inner surface abutting with the bottom face of the mounting shell; a threaded hole being formed through the center of the lower locking nut and aligning with the mounting hole of the mounting shell; and an engaging ring being formed on and protruding from the top face of the lower locking nut around the threaded hole, corresponding to and engaging the locking ring of the mounting shell; an upper locking nut abutting the top face of the mounting shell and having a center; an external surface; an outer surface; an inner surface abutting with the top face of the mounting shell; a threaded hole being formed through the center of the upper locking nut and aligning with the mounting hole of the mounting shell and the threaded hole of the lower locking nut; a position ring being formed on and protruding from the bottom face of the upper locking nut around the threaded hole and abutting the at least one positioning protrusion of the mounting shell; and an annular groove being formed around the upper locking nut between the position ring and the bottom face of the upper locking nut; a threaded shaft being mounted through the mounting hole of the mounting shell, engaging the locking nuts and having a lower end; an upper end; and a spring being connected to the upper end of the threaded shaft.