Variable-pitch propeller or fan

Details Variable-pitch propeller or fan Variable-pitch propeller or fan

1994-05-02

1995-11-07

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Having positive means for impeller adjustment

Power or manual actuator on non-rotatable part

416127, 416129, B63H 304

Patent

active

054643244

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.

REFERENCES:
patent: 2283774 (1942-05-01), Thompson
patent: 2357229 (1944-08-01), Seewer
patent: 2776719 (1957-01-01), Nichols
patent: 3295610 (1967-01-01), Frids

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