Axial fan
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United States of America Patent
Stats
-
Aug 19, 1980
Grant Date -
N/A
app pub date -
May 11, 1978
filing date -
May 17, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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