EP 0112932 B1 19850605 - RADIAL VENTILATOR WITH BACKWARDS-CURVED PROFILED BLADES
Title (en)
RADIAL VENTILATOR WITH BACKWARDS-CURVED PROFILED BLADES
Publication
Application
Priority
EP 82112081 A 19821229
Abstract (en)
[origin: US4526506A] A radial fan has airfoil-like, backwardly curved blades placed between a support plate and a cover plate. The blades are so formed that the blade entry angle on the cover plate side is 4 DEG to 7 DEG smaller than the blade entry angle on the support plate side and the blade exit angle on the cover plate side is 3 DEG to 6 DEG smaller than the blade exit angle on the support plate side. The blade entry angle on the cover plate side is between 14 DEG and 20 DEG and the blade exit angle on the cover plate side is between 39 DEG and 45 DEG . This form is produced by twist of the blades or twist-free deformation thereof.
IPC 1-7
IPC 8 full level
F04D 29/28 (2006.01); F04D 29/30 (2006.01)
CPC (source: EP US)
F04D 29/282 (2013.01 - EP US); F04D 29/30 (2013.01 - EP US); F05D 2250/70 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0112932 A1 19840711; EP 0112932 B1 19850605; AT E13711 T1 19850615; DE 3264089 D1 19850711; US 4526506 A 19850702
DOCDB simple family (application)
EP 82112081 A 19821229; AT 82112081 T 19821229; DE 3264089 T 19821229; US 56565683 A 19831227