Patent ID: 8690076

Claim:
A rotary atomizer head that atomizes and discharges paint, comprising: an inner peripheral face that increases in diameter from a bottom toward a tip thereof; a dam portion, having an annular shape, that is formed along a circumference of the inner peripheral face between the bottom and the tip of the inner peripheral face; and a paint supply port provided through the bottom of the inner peripheral face to supply the paint, the paint supply port being configured to supply paint in a radially outward direction directly to the bottom of the inner peripheral face, wherein: the paint supplied from the paint supply port to the bottom of the inner peripheral face is directed to flow to the tip along the inner peripheral face due to a centrifugal force created by a rotation of the rotary atomizer head, and is atomized and discharged from the tip of the inner peripheral face; a plurality of paint supply holes are formed through the dam portion near a boundary between the dam portion and the inner peripheral face; a portion of the inner peripheral face faces a bottom face of the dam portion; the portion of the inner peripheral face and the bottom face of the dam portion are separated from each other by a predetermined distance, defining a space configured to store the paint, the space being in flow communication with the paint supply port and the plurality of paint supply holes; the bottom face of the dam portion is formed perpendicular to a rotary shaft of the rotary atomizer head; the inner peripheral face is convexly curved from the bottom toward the tip thereof so that the portion of the inner peripheral face extends perpendicular to the rotary shaft in a region facing the bottom face of the dam portion; and the paint supply port includes a paint supply tubular member and at least one nozzle hole, the at least one nozzle hole being formed in a wall of the paint supply tubular member that is parallel to the rotary shaft of the rotary atomizer head, and the at least one nozzle hole being configured to supply the paint in the radially outward direction.