LISI AEROSPACE

A latch ( 22 ) includes a bracket ( 54 ) able to be attached to a first cowl; a hooking arm ( 58 ) comprising a hook ( 94 ) able to cooperate with a keeper ( 36 ) attached to a second cowl; a first handle ( 60 ) and a second handle ( 64 ) rotatable relative to the bracket, the first and second handles being configured so that the second handle ( 64 ) in a closed configuration blocks the first handle ( 60 ) in a closed configuration. In the closed configuration of the second handle ( 64 ), a shape of the second handle is fitted in a counter-shape ( 106 ) of the first handle ( 60 ) so as to block the first handle ( 60 ) in the closed configuration.

The present invention relates to an installation tool ( 200 ) for installing a fastener ( 12 ) in a structure ( 14 ), comprising: a tool housing ( 202 ); a first sheath ( 206 ), positioned along a first axis ( 102 ) and movable relative to the tool housing; a second sheath ( 208 ), configured to drive the first sheath in translation relative to the tool housing; a first rotary shaft ( 210 ); and a first ( 212 ) and a second ( 214 ) transmission device, able to drive the first ( 206 ) and second ( 208 ) sheaths respectively in rotation under the effect of rotations of the first rotary shaft. The tool comprises a tube ( 204 ), each of the first and second sheaths being positioned around the tube; and the first rotary shaft extends along a second axis ( 240 ), the first and second axes being separated by a first non-zero distance ( 242 ).

The present invention relates to an installation nose ( 100 ) for installing a fastener ( 12 ) in a structure ( 14 ), the fastener comprising: a pin ( 16 ) provided with a head ( 22 ); a gripping element ( 26 ); and a breakneck groove ( 28 ); the installation nose comprising: a hollow body ( 110 ), comprising a first front opening ( 120 ), able to accommodate the gripping element ( 26 ); a bushing ( 112 ), movable relative to the hollow body and comprising a second front opening ( 130 ), aligned with the first front opening; a retaining device ( 114 ), able to block the gripping element ( 26 ) in the second front opening; and a tubular element ( 115 ); the retaining device and the tubular element being movable in translation in the bushing between a first and a second axial position.

The present invention relates to an installation set ( 10 ) for installing a fastener ( 12 ) in a structure, the installation set comprising an installation nose ( 100 ), and an installation tool ( 200 ); the installation set further comprising an interface device ( 300 ), comprising: an interface body ( 302 ), comprising a through hole ( 316 ); a compression spring ( 306 ) projecting relative to the interface body; a contact rod ( 308 ), able to slide in the through hole ( 316 ); an assembly ring ( 304 ), assembled to the interface body ( 302 ); the interface body being fastened to the installation tool ( 200 ) and the assembly ring being assembled to the installation nose; a front end of the spring ( 306 ) being in contact with said nose. The installation set is movable between two configurations of the interface device.

The present invention relates to a system for controlling the tightening ( 10 ) of a fastener ( 12 ) in an assembly ( 36 ), said fastener ( 12 ) comprising a rod ( 14 ) and an assembly member ( 16 ), the control system ( 10 ) comprising: a first measuring device ( 44 ), the first measuring device ( 44 ) being suitable for measuring a first parameter representative of the temporal response of the rod ( 14 ) to ultrasonic excitation, a second measuring device ( 46 ) for measuring a second parameter representative of the frequency response of the rod ( 14 ) to ultrasonic excitation, and a calculator ( 48 ), the calculator ( 48 ) being suitable for determining a value of the rod tightening ( 14 ) as a function of at least the said first parameter and the second parameter.

An installation tool ( 14 ) has a tool body ( 50 ) comprising a first opening capable of blocking the axial end of the body ( 26 ) of a fastener ( 12 ) and an actuating device ( 52 ), rotatable relative to the tool body and comprising a second opening capable of blocking a fastener actuating element ( 28 ). The tool includes a pressure chamber ( 120 ) in the tool body a duct ( 122 ) connecting the pressure chamber to the first opening ( 62 ), a blocking element ( 124 ), movable in the duct between a retracted position and a projecting position; and a fluid inlet ( 55 ) opening onto the pressure chamber. An inflow of fluid into the pressure chamber moves the blocking element ( 124 ) to the protruding position.

The invention relates to an instrumented metal nut ( 10 b ), having a tubular body having a polygonal drive surface ( 14 ). The nut comprises, on at least one annular portion ( 34 ) of the outer surface: an electrically insulating layer ( 36 ), applied to the annular portion; a piezoresistive conductive polymer ( 38 ), the ohmic resistance of which varies according to a stress exerted during tightening of the nut on a threaded fastener, said conductive polymer being applied to the electrically insulating layer; and at least two electrodes ( 40 ).

A device, for controlling the tightening tension of a fastener, that includes a rod with two opposite flat faces, an assembly device capable of joining to the rod, and a probe including a probe body, with a frontal face capable of coming into contact with a flat face of the rod, and a transducer attached to the probe body capable of sending and/or receiving ultrasound waves. The rod has a first locking element and the probe has a second locking element capable of cooperating with said first locking element.

A metal component made of a base metal and a coating system thereon is characterized in that the coating system comprises a conductive layer on the base metal and a resin-based layer including conductive pigments on the conductive layer. The conductive pigments form electrically conductive 3D-networks in the resin, with the networks being randomly distributed in the resin. Aerospace fasteners having a coating system of a nickel flash on the base metal, and a phenolic resin-based coating including nickel fibers on the nickel flash, are also provided. Further, a method for coating a metal component is disclosed. The coating system may be applied to metal components, including aerospace fasteners such as pins, bolts, collars, nuts and nut plates, and washers, as well as studs, latches, helicopter rotors, and landing gear structures.

Telescopic assembly with locking device in retracted configuration A telescopic assembly ( 10 ) includes: a first ( 12 ) and a second ( 14 ) body; the second body comprising a rod capable of sliding into the first body between extended and retracted configurations; and a device ( 18 ) for locking in the retracted configuration. The locking device includes a ferrule ( 60 ) positioned on the rod, the ferrule comprising an internal stop ( 80 ) and the first tubular body comprising a counter-stop ( 34 ), capable of cooperating to lock the first tubular body and the ferrule. The ferrule is locked in translation relative to the second body ( 14 ) and rotatable around said second body, between an unlocked position, allowing the sliding of the second body into the first body ( 12 ), and a locked position retaining the second body in the retracted configuration.