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US 5,181,829 AGranted
Helicopter blade
AssigneeAgusta S.p.A.
InventorSantino Pancotti
Life of this patent
Estimating the term…
Abstract
A helicopter blade having a connecting device made of composite synthetic material for connecting it to the hub of a rotor via a spherical joint comprising a rod housed inside a tubular portion of the connecting device; the rod being connected to the tubular portion by two diametrical through bolts offset along the rod, and the connecting device comprising, for each of the four holes engaged by the aforementioned bolts, a substantially axial strap of composite material looped about the respective hole.
Claims5
A helicopter blade (5)(50) comprising a connecting device (7)(51) for connecting the blade (5)(50) to a hub (2) of a rotor (1);
- the connecting device (7)(51) being made of composite synthetic material, and comprising a tubular end portion (12) and first and second connecting means (38)(39) for connecting said tubular portion (12) to the hub (2);
- said first connecting means (38) comprising a rod (44) housed inside said tubular portion (12), and two first diametrical through pin means (36, 37) offset along said rod (44) and each engaging a pair of first holes (20a, 20b)(21a, 21b) formed through said tubular portion (12) for connecting the rod (44) to the tubular portion (12);
- the second connecting means (39) comprising a tubular body (46) coaxial with and fitted on to the tubular portion (12) with said first pin means (36, 37) extending through the tubular body (46);
- and the connecting device further comprising, for each said first hole (20a, 20b)(21a, 21b), a substantially axial strap (28, 29, 30, 31) (53, 54, 55, 56) of synthetic fiber material looped about said first hole (20 a, 20b)(21a, 21b).
1 more element
Dependencies are inferred from the claim text.