The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 2025
Filed:
Mar. 31, 2023
Yoshifumi Yamashita, Yokohama, JP;
Yoshifumi Yamashita, Yokohama, JP;
Abstract
A predetermined sound interval interlocking mechanismfor making opening and closing operations of sound hole coversof an existing sound range interlock with opening and closing operations of sound hole coversof an expanded sound range is provided and a sound hole switching mechanism capable of collectively closing the sound holes of the high-pitched range by one key operation is provided independent from the predetermined sound interval interlocking mechanism. By using the above described mechanisms, both ranges can be played only by the operation of selecting the sound range and operating the sound hole coversof the existing sound range. In addition, a slide platesliding along an inner surface of the tube for forcibly opening and closing the sound holesfrom the inside of the tube is proposed as the sound hole switching mechanism.