Device for folding of a helicopter rotor blade

Details Device for folding of a helicopter rotor blade Device for folding of a helicopter rotor blade

1998-06-30

2000-03-14

Ryznic, John E.

Fluid reaction surfaces (i.e., impellers)

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

Member movement in rotation plane

F04D 2926

Patent

active

060364424

ABSTRACT:
The device comprises a detachable distance-piece (19') with a pivot (20) retained in a pivoting way in the yoke (7b) of a member (7) connecting a blade (4) to the hub, by one of the two blade pins (15) and a distance-piece yoke (22') in which the blade root (6) is retained pivoting by a fitting pin (18'). The blade (4) is folded by pivoting its root (6) with respect to the distance piece (19') and pivoting the latter with respect to the yoke (7b), with a lateral shift with respect to the conventional folding without a detachable distance-piece (19'), and with a fitting pin (18') which can be inclined with respect to the blade pin (15).

REFERENCES:
patent: 2405777 (1946-08-01), Buivid
patent: 3097701 (1963-07-01), Buivid
patent: 3921938 (1975-11-01), Jupe et al.
patent: 4252504 (1981-02-01), Covington et al.
patent: 4268222 (1981-05-01), Bernard
patent: 4284387 (1981-08-01), Ferris
patent: 4466775 (1984-08-01), Martin
patent: 4712978 (1987-12-01), Tiemann
patent: 4915585 (1990-04-01), Guimbal
patent: 5322415 (1994-06-01), White et al.
patent: 5782606 (1998-07-01), Mondet et al.

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