Variable-pitch propeller or fan
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United States of America Patent
Stats
-
Nov 7, 1995
Grant Date -
N/A
app pub date -
May 2, 1994
filing date -
Oct 29, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A variable-pitch propeller or fan comprises a hollow boss, a number of propeller blades fitted rotatably on the boss, and also an adjusting element which is axially slidable in the boss and has a number of grooves running essentially at right angles to the direction of sliding, each propeller or fan blade having a control pin which is placed eccentrically relative to its rotary shaft and is slidingly accommodated in a groove of the adjusting element. In order to increase the range of adjustment each groove comprises an essentially straight part and also a second part connecting to the straight part and forming an angle with the essentially straight part.
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