Patent ID: 7910815

Claim:
An axial flow valve for a musical wind instrument, said valve comprising: a substantially frusto-conical casing comprised of a wide end, a threaded neck, a narrowed end, at least one side exit tube positioned at an angle relative to the outer surface of said frusto-conical casing, and at least one bottom exit tube; a selectively attachable back plate having at least two apertures for directing airflow and at least one bore for inserting at least one shaft, said substantially frusto-conical casing and said back plate being rotatably positioned around said shaft; an inner rotor component having at least two rotor apertures and a narrow end adapted to structurally complement a bearing; a lock ring having a threaded inner surface; at least one bearing located within said substantially frusto-conical casing; and at least one bearing seat; wherein said substantially frusto-conical casing further includes at least one machined contour to accommodate said at least one bearing, said machined contour is comprised of a contoured bore and corresponding protuberance adapted to receive a bearing having a diameter larger than the inner diameter of said substantially frusto-conical casing without interfering with airflow when said bearing is positioned within said substantially frusto-conical casing.