Arrangement and equipment for the displacement of blades, partic

Details Arrangement and equipment for the displacement of blades, partic Arrangement and equipment for the displacement of blades, partic

1980-02-08

1983-07-19

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Working member foldable, pivotable or collapsible to non-use...

416 87, B64C 1128

Patent

active

043941095

ABSTRACT:
This invention relates to an improvement in equipment for the adjustment of blades, particularly propeller blades of fans, turbines, and the like, and especially for propulsion plants on aircraft, adapted to be selectively shut-off in a low-resistance position, the improvement comprising means whereby said blades are selectively foldable out of the operating position thereof about pivot axes transversely to their longitudinal axes, whereby said axes being tangential with respect to a common base circle are inclined with respect to the axis of rotation of said propeller blades in dependence upon the degree of twist of the blades, so that the blades in the folded-in position thereof are positioned next to each other jointly as parts of an imaginary cylindrical or conical envelope surface having a helical path with respect to the longitudinal envelope surface axis.

REFERENCES:
patent: 997884 (1911-07-01), Wells
patent: 1277181 (1918-08-01), Blake
patent: 1728768 (1929-09-01), O'Connor
patent: 2955656 (1960-10-01), Balje et al.
patent: 2981339 (1961-04-01), Kaplan
patent: 2986219 (1961-05-01), Boardman et al.
patent: 3016217 (1962-01-01), Polleys et al.
patent: 3026085 (1962-03-01), Whippen et al.
patent: 3143323 (1964-08-01), Hollrock
patent: 3175619 (1965-03-01), Reed
patent: 3589647 (1971-06-01), Burkham
patent: 3957229 (1976-05-01), Davis
patent: 4130378 (1978-12-01), Eichler

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