EP 0955469 B1 20041020 - 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)
Designated contracting state (EPC)
ES GR IT
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