EP 0099615 A3 19840808 - CENTRIFUGAL FAN WITH FLOW CONTROL
Title (en)
CENTRIFUGAL FAN WITH FLOW CONTROL
Publication
Application
Priority
GB 8212312 A 19820428
Abstract (en)
[origin: EP0099615A2] A centrifugal fan having the inner edges of the impeller blades (7) extending parallel to the impeller axis incorporates a circular damper plate (11) supported coaxially within the array of blades with its edge closely adjacent the inner edges of the blades, and movable in an axial direction so as to vary the useful width of the blades and thereby the flow rate. The damper plate, being separate from the impeller (2), may be supported in a non-rotatable manner and enables the fan to operate at an efficiency comparable with one having a radial vane damper, but is simpler mechanically as it requires only a single primary moving part.
IPC 1-7
IPC 8 full level
F04D 17/08 (2006.01); F04D 27/00 (2006.01); F04D 27/02 (2006.01); F04D 29/46 (2006.01)
CPC (source: EP)
F04D 27/003 (2013.01)
Citation (search report)
[X] US 1834959 A 19311208 - MAY EDWARD M
Designated contracting state (EPC)
AT BE CH DE FR IT LI LU NL SE
DOCDB simple family (publication)
EP 0099615 A2 19840201; EP 0099615 A3 19840808; AU 1403183 A 19831103; AU 555454 B2 19860925; CA 1218635 A 19870303; DK 161283 A 19831029; DK 161283 D0 19830413; HK 70486 A 19860926; JP S58190599 A 19831107; MY 8700205 A 19871231; NO 831256 L 19831031; NZ 203561 A 19860411
DOCDB simple family (application)
EP 83301462 A 19830316; AU 1403183 A 19830428; CA 424692 A 19830328; DK 161283 A 19830413; HK 70486 A 19860918; JP 6686183 A 19830415; MY 8700205 A 19871230; NO 831256 A 19830408; NZ 20356183 A 19830314