EP 1070850 A1 20010124 - Rotary impeller
Title (en)
Rotary impeller
Title (de)
Laufrad
Title (fr)
Roue
Publication
Application
Priority
IL 13106099 A 19990723
Abstract (en)
A rotary impeller for fluids, in particular for use with self-propelled cleaning devices which are able to work in both forward and backward directions, having improved efficiency comprises a shaft (2) connectable to a motor (4) and having a headpiece (6) at its free end from which extend substantially radially at least two arms (10). An impeller blade (12) pivotally mounted on each arm has first and second major surfaces (20,20'). Two stops (14) for each impeller blade (12) are stationary relative to the headpiece (16) and define two limit positions between which each impeller blade is allowed to swivel about its arm (10). In use when the motor (4) rotates in one direction, the first impeller blade major surface (20) becomes the leading surface, and when the motor (4) changes its direction of rotation, fluid resistance causes the blades (12) to flip over from one limit position to the second limit position with the second major surface (20') becoming the leading surface. <IMAGE>
IPC 1-7
IPC 8 full level
F04D 29/24 (2006.01); F04D 29/26 (2006.01); F04D 29/36 (2006.01)
CPC (source: EP)
F04D 29/247 (2013.01); F04D 29/263 (2013.01); F04D 29/364 (2013.01)
Citation (search report)
- [X] DE 92384 C
- [XY] FR 2090429 A5 19720114 - DURAND FRANCOIS
- [Y] US 3906728 A 19750923 - KANTZ DON B
- [A] US 2257976 A 19411007 - MOORMAN CHARLES L
- [A] US 4178127 A 19791211 - ZAHORECZ ZOLTAN P [US]
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 00200996 A 20000320; IL 13106099 A 19990723