Axial fan

Details Axial fan Axial fan

1978-05-11

1980-08-19

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Specific drive or transmission means

Alternating rotation

416146A, 416168R, F04D 2936

Patent

active

042181887

ABSTRACT:
In an axial fan having an impeller with settable blades and wherein the root end of each blade connects, via a bearing permitting rotation of the blade, to the outer end of a blade-attachment shaft extending substantially radially relative to the impeller, the blade-attachment shaft is rigidly connected at its inner end to an impeller hub. The blade-attachment shaft is abutted against the radial outer side of the hub and is pre-tensioned by compressing said shaft in the longitudinal direction thereof against said hub.

REFERENCES:
patent: 2390068 (1945-12-01), Adams et al.
patent: 3175803 (1965-03-01), Newey et al.
patent: 3790301 (1974-02-01), Pedersen et al.
patent: 3844680 (1974-10-01), Saterdal
patent: 3920353 (1975-11-01), Bredsted
patent: 4046486 (1977-09-01), Kolb

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