Valve for brass band instrument - has outer part of valve with two cylindrical pipe unions per valve plane

摘要

The instrument valves (1-8) consist of several, cylindrical valve housings with air connecting unions, in which are rotatably located valve bodies controlling the air flow. Each valve body contains several, opposite air ducts of circular cross-section, and a there is a bearing shaft concentric with the valve housing. The outer part of the valve has two cylindrical pipe unions per valve plane. The centres of intersections through the air ducts of the rotor are distributed on a circle with the centre point on the rotation axis of the rotor. Their symmetry axis is orthogonal to the rotation axis, with the exception of the connecting branches.