Blade retention pin system for a helicopter blade folding system

Details Blade retention pin system for a helicopter blade folding system Blade retention pin system for a helicopter blade folding system

1993-02-08

1993-10-05

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

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

Member movement in rotation plane

416 63, 416142, B64C 1128

Patent

active

052499260

ABSTRACT:
A blade retention pin system is operative to secure the blade cuff of a main rotor blade of a helicopter in combination with a spindle assembly of the main rotor hub assembly for main rotor assembly operations and is readily reconfigurable to accommodate blade folding operations. The blade retention pin system includes first and second pin assemblies, each pin assembly including a retainer pin and a handle subassembly, which includes a retainer member and a spring member in superposed abutting combination, pivotably mounted in combination therewith. The first pin assembly includes, in addition, a safety pin subassembly secured in combination therewith. Each retainer pin is inserted into aligned apertures of the blade cuff and spindle assembly and locked in place by pivoting the handle subassembly from an unlocked to a locked position wherein the retainer member engages the retainer pin and the spring member is biased onto the retainer pin to abuttingly engage the retainer member.

REFERENCES:
patent: 2966947 (1961-01-01), Batesole
patent: 3135333 (1964-06-01), Cruz et al.
patent: 3158203 (1964-11-01), Grunfelder
patent: 4252504 (1981-02-01), Covington et al.
patent: 4268222 (1981-05-01), Bernard
patent: 4493663 (1985-10-01), Richmond
patent: 4712978 (1987-12-01), Tiemann

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