Lisi Aerospace

Martial Broucke

Alan Philippe

Gildas Boleis

Pierre Petit

Benoit Regnard

Julien Goyer

Alexandre Berthou

Aurélien Montier

Christophe Payard

Benoît Regnard

A fastener installation tool and method for interference fit, said fastener () comprising a head and a grasping element, said tool comprising a first body () extending along a first main axis and having: &#x2014;at least one load-reacting surface, of which one also constitutes a surface for the application of a load; &#x2014;a load transmission surface, and&#x2014;a housing extending along the first main axis from a first end of said first body, said housing being extended along the first main axis by a drilling extending from said housing as far as a second end of said first body. According to the invention, the load transmission surface is situated at the second end of the first body () and extends perpendicular to the first main axis, said load transmission surface being dimensioned to be able to bear simultaneously on the head and on the insert clamp.

Tool for inserting a fastener into a structure by interference and installation method for installing a fastener in a structure by interference using such a tool

The invention concerns a unit () for a locking device, comprising: a nut () comprising two coaxial taps in opposite directions; and a ring (); said ring including a third tap (); the first () and third () taps being capable of engaging with a single first thread (); said ring including a second thread () capable of engaging with the second tap () of the nut. The unit further comprises a washer () configured () so as to be inserted around one () of the nut and the ring, the washer comprising an elastic engagement means () for engaging with the other () of the ring and the nut in an installation position of the unit, so as to prevent the ring and the nut from rotating relative to each other.

Nut-locking device and associated assembly unit

The invention relates to a locking device () comprising: a shaft () comprising a first thread (); and a nut () and a ring () to be assembled on the shaft; the nut comprising a first inner thread () defining a first radial clearance with the first thread of the shaft; the nut further comprising a second inner thread () in the opposite direction to the first inner thread, the ring () comprising a second thread () defining a second radial clearance with the second inner thread of the nut; the ring comprising a third inner thread () defining a third radial clearance with the first thread of the shaft. The inner threads and the first and second threads have an identical and constant thread pitch; and each of the second and third radial clearances is greater than the first radial clearance.

Nut locking device and assembly for mounting same

The present invention relates to a unit () for a locking device, including: a nut () comprising first () and second () coaxial taps in opposite directions; and a ring (); said ring including a third tap (); the first () and third () taps being capable of engaging with a single first thread (); said ring including a second thread () capable of engaging with the second tap () of the nut. A portion () of the ring, projecting relative to the second thread (), includes a through-hole (); and a surface () of the nut includes a visual marking, configured to be opposite the hole () when the nut and the ring are in an installation position, and separated from said hole when the nut and the ring are outside said installation position.

The object of the invention is a cap to lubricate an inner wall of a perforation going through at least two elements of the structure. The cap comprises a tubular body and at least one lubricant reserve, and before installation in the structure said cap has a largest external diameter larger than an internal diameter (D) of the perforation, and the cap lubricates the internal surface of the perforation when its largest external diameter is radially compressed by a wall of the perforation. The invention also concerns a fastener comprising this type of cap, and an interference assembly process for the fastener equipped with the cap. The invention is applicable to the assembly of aircraft structures.

Lubricating cap, fastener comprising this type of cap and interference assembly process

The invention concerns a metal attachment for providing an electrically conductive surface through the entire thickness of structural elements to be assembled. The attachment thereby comprises a head () and a smooth shank () extending along an axis of revolution, characterized in that the shank comprising at least one conductive portion () and one lubricating portion () disposed along the axis of revolution of the attachment along at least one length of the shank. The attachment according to the invention provides a conductive surface through the entire thickness of the structure in which it is installed. The attachment according to the invention is intended, in particular, for aeronautical applications.

Metal attachment

A control ring and a method of using a control ring on fasteners can be used to verify a headed fastener having a band coating a fastener shaft. The ring comprises a cylindrical tubular body extending along an axis of revolution (B) and two opposite extremities. A first extremity includes two adjacent arc segments, each arc segment having an end wall extending in a plane perpendicular to the axis of revolution (B) of the ring, the planes of the two walls not being one and the same and axially offset from the first extremity. Each arc segment comprises at least one side wall extending over a radial plane going through the axis of revolution (B) of the ring. The width of an arc segment allows verifying a minimum band width, and the width of the two arc segments allows verifying a maximum band width on the fastener.

Control ring

The invention relates to a metal fastener that makes it possible to ensure an electrically conductive surface along the entire thickness of structural elements to be assembled. The fastener thereby comprises a head and a smooth shank extending along an axis of revolution, characterized in that the shank comprises at least one conductive portion and one lubricating portion disposed along the axis of revolution of the fastener along at least one length of the shank. The inventive fastener makes it possible to ensure a conductive surface in the entire thickness of the structure in which it is installed. The inventive fastener is particularly intended for aeronautical applications.

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Delincourt, France

Martial Broucke