EP 1400636 A1 20040324 - Hollow panel
Title (en)
Hollow panel
Title (de)
Hohlkammerplatte
Title (fr)
Panneau creux
Publication
Application
Priority
JP 2002274727 A 20020920
Abstract (en)
A hollow panel (10) includes comprise hollow portions (12) between front and rear outer sides (11) having a substantially flat plate shape. In the hollow panel (10), the surface density is partially differentiated, whereby a lack of sound insulation due to the coincidence effect at a specific frequency is prevented from occurring. The surface density or the rigidity can be made non-uniform to suppress the lack of sound insulation, by differentiating sectional areas by forming plural kinds of widths of the hollow portions (12), or by differentiating the distances between partition walls (13) or the thicknesses of the walls.
IPC 1-7
IPC 8 full level
E04B 1/86 (2006.01); E04B 2/02 (2006.01); E04C 2/30 (2006.01); E04C 2/34 (2006.01); E04C 2/36 (2006.01); E04B 1/84 (2006.01)
CPC (source: EP US)
E04B 1/86 (2013.01 - EP US); E04C 2/34 (2013.01 - EP US); E04C 2/36 (2013.01 - EP US); E04B 2001/8457 (2013.01 - EP US); E04B 2001/8471 (2013.01 - EP US); E04B 2001/8476 (2013.01 - EP US)
Citation (search report)
- [PX] EP 1321593 A2 20030625 - DIAPLAN LIEGENSCHAFTSVERWALTUN [AT]
- [X] US 6021612 A 20000208 - DUNN STANLEY E [US], et al
- [XY] EP 1199141 A2 20020424 - YAMAHA CORP [JP]
- [XY] US 4167598 A 19790911 - LOGAN PAUL A, et al
- [X] DE 1805115 A1 19700521 - GOESELE DR ING KARL
- [X] GB 1384577 A 19750219 - REED INTERNATIONAL LTD
- [X] DE 2506472 A1 19760819 - LOCKHEED AIRCRAFT CORP
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1400636 A1 20040324; EP 1400636 B1 20090513; CA 2441749 A1 20040320; CA 2441749 C 20070313; CN 100333885 C 20070829; CN 1493439 A 20040505; CN 2673986 Y 20050126; DE 60327587 D1 20090625; HK 1062546 A1 20041112; JP 2004108084 A 20040408; JP 3918699 B2 20070523; US 2004074206 A1 20040422
DOCDB simple family (application)
EP 03021112 A 20030919; CA 2441749 A 20030919; CN 03158569 A 20030919; CN 03208045 U 20030919; DE 60327587 T 20030919; HK 04105486 A 20040726; JP 2002274727 A 20020920; US 66643103 A 20030919