Fail-safe nut retainer for a helicopter

Details Fail-safe nut retainer for a helicopter Fail-safe nut retainer for a helicopter

1992-10-30

1993-11-30

Denion, Thomas E.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Turbo machine

416244R, 411429, 411432, B63H 120

Patent

active

052660087

ABSTRACT:
A main rotor head is disclosed, which is adapted for mounting on a main rotor mast of a helicopter. A main rotor mast nut is threaded onto the main rotor mast in order to fasten the main rotor head to the mast. The key feature of the invention is a nut retention means, which comprises a cup-shaped round annular disk and closely surrounds the nut, preventing separation of the main rotor head from the main rotor mast should the nut fail during flight.

REFERENCES:
patent: 2571265 (1951-10-01), Leufven
patent: 3261254 (1966-07-01), Pinkerton
patent: 4182215 (1980-01-01), Green et al.
patent: 4435100 (1984-03-01), Cox
patent: 4880344 (1989-11-01), Henry et al.
patent: 5069587 (1991-12-01), Levenstein

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