Abstract: The present invention provides a valve assembly designed to regulate air flow through a musical instrument and is designed to avoid bumps typically associated with valve construction that result in distortion and other harmful effects on vibrating columns of air that pass there-through. The valve assembly comprises: a cylindrical-shaped valve casing having openings formed therein that define at least one ingress and at least one egress through which vibrating columns of air pass; and a valve piston received within the valve casing and linearly displaceable therein, the valve piston comprising at least one passageway having a cross-section that is open and u-shaped, whereby other passageways formed in the valve piston are bump-free.

Abstract: The present invention provides a valve assembly designed to regulate air flow through a musical instrument and is designed to avoid bumps typically associated with valve construction that result in distortion and other harmful effects on vibrating columns of air that pass there-through. The valve assembly comprises: a cylindrical-shaped valve casing having openings formed therein that define at least one ingress and at least one egress through which vibrating columns of air pass; and a valve piston received within the valve casing and linearly displaceable therein, the valve piston comprising at least one passageway having a cross-section that is open and u-shaped, whereby other passageways formed in the valve piston are bump-free.