EP 0486691 A4 19920902 - CENTRIFUGAL FAN
Title (en)
CENTRIFUGAL FAN
Publication
Application
Priority
SU 9000147 W 19900608
Abstract (en)
[origin: WO9119104A1] A fan has a spiral-shaped casing in which is mounted the fan impeller consisting of a carrying disk (6) and a cover disk (7) between which are secured blades (8). The entrance angle of each blade (8) increases from the carrying disk (6) towards the cover disk (7). The curved lateral surface (12) of each blade (8) has the form of a linear unrolling surface with their generatrix (16) inclined to the plane perpendicular to the axis of the fan impeller at an angle ($g(a)) between 45 and 85. The projection (17) of at least one of said generatrix on the plane perpendicular to the axis of the fan impeller is a tangent to the section (13) of the curve obtained as a result of intersection of the lateral surface (12) of the blade (8) by said plane.
IPC 1-7
IPC 8 full level
F04D 29/30 (2006.01)
CPC (source: EP)
F04D 29/282 (2013.01); F04D 29/30 (2013.01)
Citation (search report)
- [A] US 1341882 A 19200601 - CRIQUI ALBERT A
- [A] FR 2378962 A1 19780825 - KAWASAKI HEAVY IND LTD [JP]
- [A] GB 191023096 A 19110216 - KEITH JAMES [GB]
- [A] GB 464449 A 19370419 - JAMES KEITH & BLACKMAN COMPANY, et al
- See references of WO 9119104A1
Designated contracting state (EPC)
BE DE DK FR GB IT SE
DOCDB simple family (publication)
WO 9119104 A1 19911212; DE 69017911 D1 19950420; DE 69017911 T2 19951012; EP 0486691 A1 19920527; EP 0486691 A4 19920902; EP 0486691 B1 19950315; FI 102309 B1 19981113; FI 102309 B 19981113; FI 920519 A0 19920207; JP H05505438 A 19930812
DOCDB simple family (application)
SU 9000147 W 19900608; DE 69017911 T 19900608; EP 91903340 A 19900608; FI 920519 A 19920207; JP 50385891 A 19900608