Title:
SOUND ABSORBING PLATE
Document Type and Number:
Japanese Patent JP2004341470
Kind Code:
A
Abstract:
To provide a lightweight sound absorbing plate which is easily fitted to a railing etc., and has high sound absorbing performance.
Many closed-tube air column parts are constituted by forming many holes 3 in a plate body 2 of a foamed polymeric resin raw material from one surface side to the other surface side. The holes forming the closed-tube air column parts may be made different in length. The holes may be formed obliquely to the spreading direction of the plate body. After at least the front part and flank part of the plate body are covered with a protection plate 4, through holes 7 corresponding to the holes of the plate body may be formed in the front part of the protecting plate.
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Inventors:
HIRAMATSU TOMOTAKA
SEKI MASAKI
MIURA AKIHISA
OGUCHI TAKASHI
SEKI MASAKI
MIURA AKIHISA
OGUCHI TAKASHI
Application Number:
JP2003270963A
Publication Date:
December 02, 2004
Filing Date:
July 04, 2003
Export Citation:
Assignee:
TAISEI CORP
TOKAI RYOKAKU TETSUDO KK
SEKISUI CHEMICAL CO LTD
TOKAI RYOKAKU TETSUDO KK
SEKISUI CHEMICAL CO LTD
International Classes:
E01F8/00; G10K11/16; G10K11/162; G10K11/172; (IPC1-7): G10K11/172; E01F8/00; G10K11/16; G10K11/162
Domestic Patent References:
| JPH08260589A | 1996-10-08 | |||
| JPH081246U | 1996-08-09 | |||
| JPS50111917U | 1975-09-12 | |||
| JP2002341873A | 2002-11-29 | |||
| JPH09328833A | 1997-12-22 |
Attorney, Agent or Firm:
Norihiko Hibi
Einosuke Kishimoto
Akira Watanabe
Kiyosue Yasuko
Einosuke Kishimoto
Akira Watanabe
Kiyosue Yasuko
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