Patent ID: 9159304
Filing Date: 2015-10-13
Classification: G10D

Abstract:
1. A bore-variable leadpipe for brass instruments, comprising: a mouthpiece receiver being integrally formed on a tube body of a brass instrument and having a first opening; the mouthpiece receiver internally defining a first bore extending from the first opening toward the tube body; and an assembling section, a tapered section and an air-guiding section being sequentially formed in the first bore starting from the first opening; and a mouthpiece adaptor having a receiving end, through which a mouthpiece is extended into the mouthpiece adaptor, and an assembling end for extending into the first bore to engage with the assembling section and thereby assembling the mouthpiece adaptor to the mouthpiece receiver; the receiving end and the assembling end defining a second opening and a third opening, respectively; and the mouthpiece adaptor internally defining a second bore that communicates the second opening with the third opening; and the second bore and the first bore being aligned and communicable with each other when the mouthpiece adaptor is assembled to the mouthpiece receiver, and thereby forming a conical passage, in which the mouthpiece is fitted, and a cylindrical passage, via which air is guided to the tube body of the brass instrument.