The invention relates to an impeller (10) for an axial fan comprising an impeller body (12) which has an outer impeller jacket (14) and a carrying disk (16) having a hub (18) for connecting to a drive shaft (20) in a rotationally fixed manner wherein a plurality of blades (22) directed radially outward is arranged o...

Apparatus for the hydraulic adjustment of the blades (2) of an impeller (1) of an axial-flow fan, comprising an adjustment cylinder (6) that is provided with a first chamber (11) and a second chamber (12) on both sides of a piston (7) that is displaceable in the adjustment cylinder (6), each of the chambers being pr...

An axial-flow fan is provided with a hydraulic displacement mechanism (6, 6\ 7, 8, 8', 9, 10, 11. 12) for blades (2) of an impeller (1). The displacement mechanism is comprised essentially of a displacement cylinder (6, 6') and a piston rod (8, 8') having a piston (7), of which one component is axially displaceable ...

An axial fan having an impeller (1) and adjustable blades (2) is provided, whereby the impeller (1) has a supporting ring (5) in which spindles (11) connected with the blades (2) are rotatably mounted. In this connection, the support of each spindle (11) is comprised of a roller bearing (14) that rests against the i...