Leonardo Corporation

Agusta S.p.a.

Agustawestland Limited

Diego Scaltritti

Giuseppe Gasparini

Daniele Podda

Federico Montagna

Paolo Pisani

Andrea Gabrielli

Marco Ernesto Tamborini

Francesco Grisostolo

Andrea Bianchi

Gabriele Delvecchio

Lorenzo Alari

Transmission assembly for an aircraft capable of hovering, comprising: a first and a second member and support means of the first member with respect to the second member; a primary lubrication circuit comprising a primary tank of a lubricating fluid and primary fluidic supply means for supplying fluid to the support means; and an emergency lubrication circuit comprising an emergency tank of lubricating fluid fluidically connected to the primary tank; and auxiliary fluidic supply means of the lubricating fluid to the support means, comprising a nozzle; the auxiliary fluidic supply means comprise a dosing device and a fluidic line, which fluidically connects the emergency tank with the dosing device; the dosing device comprising a passage for the lubricating fluid from the fluidic line to the nozzle, which comprises a plurality of concentrated pressure drop sections, which are distinct and spaced apart from each other.

Transmission assembly for an aircraft capable of hovering

A description is provided of a planetary gear comprising a sun rotatable around a first axis, a crown angularly fixed with respect to the first axis; two satellites that are meshing, rotatable around respective second axes; a satellite carrier rotatable around the first axis and comprising at least two first pins with respect to which the satellites are rotatable around respective second axes; and a plurality of bearings comprising: a first ring defining a first raceway that is at least partially spherical; a second ring defining a second raceway; and a plurality of rolling bodies shaped as an hourglass rolling on the first spherical raceway and a second raceway; each rolling body being in contact with the raceways at a line with axial ends lying on respective straight lines tilted between them and converging in a point lying on a median plane of the rolling body and on the second axis; the straight lines define a first angle, whose bisector lies on the first median.

Planetary gear for a transmission for an aircraft capable of hovering

An aircraft capable of hovering is described, comprising a motor member; a rotor connected to the motor member; a transmission shaft rotatable around a first axis and adapted to drive the rotor; and a transmission interposed between the motor member and the rotor and comprising a planetary gear formed by a sun rotatable around a second axis; a crown that is angularly fixed; and two satellites meshing, each, with the crown and the sun, and rotatable around respective third axes, which are, in turn, rotatable around the second axis; and a satellite carrier rotatable around the second axis and comprising two first pins with respect to which the satellites are rotatable around the respective third axes; the transmission comprises an interface, angularly integral with the satellite carrier around the second axis and said transmission shaft around the first axis; the interface being coupled to said satellite carriers and the transmission shaft so as to allow an angular misalignment between the second axis and a portion of the interface.

Aircraft capable of hovering

A damping device for damping flexural vibration of a shaft rotating about a first axis, the device having: a supporting body; and a member, which defines an annular opening fitted through with the shaft, and is movable, with respect to the supporting body and radially with respect to the first axis, between a first and a second position when the shaft flexes radially with respect to the first axis. The member is set to the first position, and the opening is traversed loosely by the shaft when the rotation speed of the shaft is within a first range; the member is set to the second position, and the opening cooperates with the shaft, when the rotation speed of the shaft is within a second range differing from the first range and including at least one critical speed of the shaft; and the damping device has elastic means interposed between the supporting body and the member.

Rotary shaft flexural vibration damping device

A transmission joint for angularly connecting a first and a second member, and having a coupling member interposed functionally between the first and second member and extending about an axis; the coupling member has: a first portion connectable angularly to the first member, a second portion connectable angularly to the second member and located radially outwards of the first portion, and an intermediate portion interposed radially between the first and second portion and elongated in a direction crosswise to the axis; the intermediate portion of the coupling member has, from the first portion to the second portion, a first portion decreasing in thickness crosswise to the direction, and a second portion of constant thickness.

Growing community of inventors

Samarate, Italy

Diego Scaltritti