EP 0466983 A1 19920122 - Noise suppression.
Title (en)
Noise suppression.
Title (de)
Geräuschunterdrückung.
Title (fr)
Suppression de bruit.
Publication
Application
Priority
EP 90307734 A 19900716
Abstract (en)
A fan (14) is rotatably mounted in a housing (10) and has a plurality of blades (15). Fan (14) and housing (10) are arranged to co-operate, for example by providing two spaced apart formations (16) and (17), such that rotation of the fan (14) generates two sound waves which tends to cancel out. The fan is particularly suitable for use with a tumble dryer. <IMAGE>
IPC 1-7
IPC 8 full level
F04D 29/42 (2006.01); F04D 29/66 (2006.01)
CPC (source: EP)
F04D 29/422 (2013.01); F04D 29/665 (2013.01)
Citation (search report)
- [X] FR 2266016 A1 19751024 - INT STANDARD ELECTRIC CORP [US]
- [Y] EP 0175229 A2 19860326 - HEIDOLPH ELEKTRO GMBH & CO KG [DE]
- [Y] EP 0039459 A1 19811111 - DEUTSCHE FORSCH LUFT RAUMFAHRT [DE], et al
- [A] DE 1428130 A1 19681128 - HEINKEL AG ERNST
- [A] US 3963370 A 19760615 - YATES ROY K, et al
- [A] PATENT ABSTRACTS OF JAPAN vol. 11, no. 336 (M-638)(2783) 04 November 1987, & JP-A-62 118095 (MATSUSHITA ELECTRIC) 29 May 1987,
- [A] PATENT ABSTRACTS OF JAPAN vol. 11, no. 120 (M-580)(2567) 15 April 1987, & JP-A-61 261699 (NIPPON) 19 November 1986,
- [A] PATENT ABSTRACTS OF JAPAN vol. 4, no. 37 (M-4)(519) 27 March 1980, & JP-A-55 10067 (MITSUBISHI) 24 January 1980,
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 90307734 A 19900716