EP 0955469 A3 20010228 - Impeller of fan
Title (en)
Impeller of fan
Title (de)
Lüfterrad
Title (fr)
Roue de ventilateur
Publication
Application
Priority
JP 10234498 A 19980414
Abstract (en)
[origin: EP0955469A2] An impeller of a fan includes hub (3) mounted with plural blades (2). The fan blows air by spinning the blades. A revolution locus of a leading edge (6) of blade (2) shows a valley in a portion between around a center and tip (8) of blade (2), and shows a peak in a portion between around the center and hub (3), with regard to windward. A cross sectional view of blade (2) in a radial direction shows a valley in a portion between around a center and tip (8), and shows a peak in a portion between around the center of blade (2) and hub (3). This structure realizes to lower the noise level and to increase the static pressure. <IMAGE>
IPC 1-7
IPC 8 full level
F04D 29/38 (2006.01)
CPC (source: EP)
F04D 29/384 (2013.01)
Citation (search report)
- [XP] EP 0887558 A1 19981230 - SIEMENS CANADA LTD [CA]
- [A] FR 758871 A 19340124 - THOMSON HOUSTON COMP FRANCAISE
- [A] EP 0052358 A1 19820526 - NIPPON DENSO CO [JP]
- [A] US 3416725 A 19681217 - BOHANON HOY R
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0955469 A2 19991110; EP 0955469 A3 20010228; EP 0955469 B1 20041020; CN 1107808 C 20030507; CN 1232143 A 19991020; ES 2230759 T3 20050501; JP 3204208 B2 20010904; JP H11294389 A 19991026; MY 123252 A 20060531
DOCDB simple family (application)
EP 99106357 A 19990329; CN 99105133 A 19990413; ES 99106357 T 19990329; JP 10234498 A 19980414; MY PI9901194 A 19990327