Abstract: A musical instrument piston valve receivable in a valve casing. The valve includes a valve stem, a valve barrel connected to the valve stem, and a valve guide slidably disposed with respect to the valve barrel. A spring is disposed in the valve barrel extending between the valve stem and the valve guide. A piston extends from the valve barrel and includes one or more ports. There are also various ways of adjusting the angular orientation of the piston in the valve casing. It is preferred that the piston and the valve barrel are monolithic in construction and the piston valve includes an adjustable valve guide.

Abstract: A novel musical instrument tone hole forming tool. A body includes a distal end to be inserted transversely into a musical instrument through an opening therein. The distal end of the body includes sockets spaced about its periphery. Bearings are located in the sockets. A shaft is moveable within the body and includes reduced diameter distal portions which receive the bearings in a contracted configuration in order to insert the body into the musical instrument. The shaft drives the bearings outward from the distal end of the body in an expanded configuration to form the tone hole when the body is withdrawn out of the musical instrument.

Abstract: A novel musical instrument tone hole forming tool. A body includes a distal end to be inserted transversely into a musical instrument through an opening therein. The distal end of the body includes sockets spaced about its periphery. Bearings are located in the sockets. A shaft is moveable within the body and includes reduced diameter distal portions which receive the bearings in a contracted configuration in order to insert the body into the musical instrument. The shaft drives the bearings outward from the distal end of the body in an expanded configuration to form the tone hole when the body is withdrawn out of the musical instrument.

Abstract: A musical instrument piston valve receivable in a valve casing. The valve includes a valve stem, a valve barrel connected to the valve stem, and a valve guide slidably disposed with respect to the valve barrel. A spring is disposed in the valve barrel extending between the valve stem and the valve guide. A piston extends from the valve barrel and includes one or more ports. There are also various ways of adjusting the angular orientation of the piston in the valve casing. It is preferred that the piston and the valve barrel are monolithic in construction and the piston valve includes an adjustable valve guide.