Patent ID: 8814519
Filing Date: 2014-08-26
Classification: F04D,Y10T

Abstract:
1. A fan ( 1 ) with a driving dog ( 4 ), wherein the driving dog ( 4 ) is connected to a fan wheel ( 5 ), wherein the driving dog ( 4 ) butts by a first number of contact surfaces ( 10 ) against additional contact surfaces ( 11 ) of the fan wheel, characterized in that at least one of the driving dog ( 4 ) and the fan wheel ( 5 ) has more than the first number of contact surfaces ( 10 ) or additional contact surfaces ( 11 ), wherein at least two contact surfaces ( 10 ) or additional contact surfaces ( 11 ) have different height positions with regard to a center plane or surface of the driving dog ( 4 ) or of the fan wheel ( 5 ).