EP 0261490 B1 19900321 - RADIAL FAN
Title (en)
RADIAL FAN
Publication
Application
Priority
DE 3631942 A 19860919
Abstract (en)
[origin: US4746266A] In a radial blower with two blower wheels (2, 3) fastened axially in tandem on one shaft end each of the interposed drive motor (b 1) with one blower blade circle (21, 31 respectively) held at a radial distance from the hub (26, 36) on the blower shaft side, the operating noise is to be reduced by simple arrangement while maintaining a high output yield; to this end it is proposed to connect the blower blade ring (21 and 31 respectively) of each blower wheel (2, 3) via spokes (22 to 25, and 32 to 35 respectively) leaving free tangential spaces and to arrange the spokes (22 to 25) of the one blower wheel (2) relative to the spokes (32 to 35) of the other blower wheel, as seen in the axial direction (blower shaft 4) in the gaps (circumferential angle of rotation alpha ) relative to each other in the circumferential direction.
IPC 1-7
IPC 8 full level
F04D 25/16 (2006.01); F04D 29/28 (2006.01)
CPC (source: EP US)
F04D 25/166 (2013.01 - EP US); F04D 29/283 (2013.01 - EP US)
Citation (examination)
- US 2275564 A 19420310 - SHAWHAN SAM F, et al
- DE 2530133 C3 19790405
- DE 2939385 C2 19821125
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0261490 A1 19880330; EP 0261490 B1 19900321; DE 3631942 A1 19880407; DE 3631942 C2 19880630; DE 3761995 D1 19900426; US 4746266 A 19880524
DOCDB simple family (application)
EP 87113062 A 19870907; DE 3631942 A 19860919; DE 3761995 T 19870907; US 9439287 A 19870908