Title:
中空構造体および共鳴音低減体
Document Type and Number:
Japanese Patent JP7074211
Kind Code:
B2
Abstract:
A hollow structure has a hollow body with an annular first space and at least one resonator. In the resonator there is formed an elongated second space with a pair of openings at two ends thereof. Each of the pair of openings opens inwardly toward the interior of the first space. The ratio of the length of a centerline of the second space to the length of a centerline of the first space is within a range of from 0.45 to 0.55. The second space is disposed in a curve along a circumferential surface of the first space and is shaped such that one of the two ends of the second space is folded back toward the other end.
Inventors:
Home Yoshikazu
Azumi Yoshida
Azumi Yoshida
Application Number:
JP2020569271A
Publication Date:
May 24, 2022
Filing Date:
January 31, 2019
Export Citation:
Assignee:
Yamaha Corporation
International Classes:
B60B21/02; B60B21/12
Domestic Patent References:
| JP2015171876A | ||||
| JP2015145181A | ||||
| JP2017142310A | ||||
| JP2005205934A | ||||
| JP2018012499A | ||||
| JP2017116706A |
Foreign References:
| WO2014097363A1 | ||||
| US20160059624 | ||||
| DE102018214151A1 |
Attorney, Agent or Firm:
Ochi International Patent Office