Abstract: The invention relates to a positive locking fastener comprising: a screw (1), a threaded portion (11) of which has a blind hole (110) and a groove (111); a nut (2) having a tightening portion (21); a cap (3); and a pin (4). The cap (3) has an immobilizing portion (31) intended to engage with the tightening portion (21) and a locking portion (32) intended to cooperate with the blind hole (110) to prevent said cap from rotating relative to the screw (1). The locking portion (32) also comprises openings (322) suitable for allowing the pin (4) to be inserted into said openings and into the groove (111) in order to hold the screw (1) and the cap (3) together.

Abstract: The invention relates to a positive locking fastener comprising: a screw (1) having a cavity (110) at a threaded portion (11); a nut (2) having a tightening portion (21); a first cap (3); a second cap (4); and a pin (5). The first cap is suitable for being inserted into the cavity of the threaded portion. The second cap has a locking portion (402) intended to engage with the first cap and a blocking portion (401) intended to engage with a tightening portion (21) of the nut. The locking portion of said second cap comprises openings (4020) suitable for allowing the pin to be inserted through said openings in order to hold the first cap and the second cap together. The invention also relates to a method for implementing the fastener according to the invention.

Abstract: The present invention relates to a locking device (10), comprising a threaded rod (12) and a tapping tube (14), which are movable relative to each other. An outer surface of the tube includes a first anti-rotation form. The device further comprises: a locking sleeve (16) positioned around the rod and comprising a second anti-rotation form (60, 62) capable of being assembled to the first anti-rotation form; and an elastic element (18) connected to the locking sleeve. In a locked position, the first (38, 40) and second (60, 62) anti-rotation forms are assembled; and in a release position, said anti-rotation forms are axially spaced apart, whereby the tube is free to rotate relative to the sleeve.

Abstract: The present invention relates to a locking nut (10), comprising: a body (20) and a bore passing through said body along a main axis, the body comprising: a bearing face (30); a drive surface (32); and at least one through-hole (38), substantially perpendicular to the main axis from the radial drive surface. The body further comprises a locking collar (36) of elliptical shape; and the drive surface comprises an upper region (50) and a lower region (52), adjacent along the main axis, the lower region being situated between the upper region and the bearing surface; a perimeter of the lower region around the main axis being greater than a perimeter of the upper region; the at least one through-hole (38) extending from the upper region (50).

Abstract: 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 (DS) 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.

Abstract: A rivet may include a pin comprising: a threaded portion (36), a shank (38) and a head (40); and a bushing (32) comprising an essentially cylindrical body, said body comprising a deformation zone designed to form an external bulge (80); a collar (70) designed to receive the head of the pin; and a tapped portion (66) designed to engage with the threaded portion of the pin. The shank (38) of the pin comprises a first cylindrical portion (44) and a second cylindrical portion (46) connected by a shoulder (48), the first portion being adjacent to the head and having a first diameter, the second portion being adjacent to the threaded portion and having a second, smaller diameter.

Abstract: A latch (12) intended for assembling a removable panel (18) to a structure (14), notably that of an aircraft, includes a bracket (30) fixed to the panel; a keeper (32) and a push button (34) hinged to the bracket; a torsion spring (40) comprising two arms respectively in abutment on the keeper and the push button. The latch is movable between a closed configuration, in which the keeper is in contact with the push button, and an open configuration, in which the keeper is spaced apart from the push button. The latch further includes a roller (42) rotatably supported on an arm (86) of the spring; and the keeper includes a profile (58) on which the roller moves when the latch is moved between the closed and open configurations.

Abstract: A nut (32) for assembling elements of a structure comprises a collar (64) capable of coming into contact with a front face of the structure; a tightening zone having an outer diameter (86) capable of being inserted into a hole of the structure; a deformation zone adjacent to the tightening zone and capable of forming a bulge against a rear face of the structure, opposite the front face; and a tapped portion (65) adjacent to the deformation zone. The nut may include grooving (82) on an outer circumference of at least one part of the deformation zone, a maximum diameter of said grooving (82) being less than or equal to the outer diameter (86) of the tightening zone.

Abstract: Insertable clamp (100), for the temporary assembly of at least two drilled structural parts (200a, 200b), including a main tubular body (10) extending along a longitudinal axis X and having a bearing surface (111) intended to come into contact with a first face (201a) of the structural parts, an elastic clip (30) capable of passing through drilled aligned holes, produced in said parts, the clip being translationally moveable along the longitudinal axis, driven by the rotation about said axis of a driver nut (50) provided with a tapped bore (51) cooperating with a threaded end (31) of said clip, the clip (30) comprising two branches (32) each ending by a hooking spur (33) intended to come into contact with a last face (202b) of the structural parts, said branches transversally and progressively moving apart along a spreader (40), placed between said branches and fixed in relation to the main body (10), when exposed to the recoil of the clip, the clamp further includes a compression spring (60) placed inside th

Abstract: The invention relates to a positive locking fastener comprising: a screw (1) having a cavity (110) at a threaded portion (11); a nut (2) having a tightening portion (21); a first cap (3); a second cap (4); and a pin (5). The first cap is suitable for being inserted into the cavity of the threaded portion. The second cap has a locking portion (402) intended to engage with the first cap and a blocking portion (401) intended to engage with a tightening portion (21) of the nut. The locking portion of said second cap comprises openings (4020) suitable for allowing the pin to be inserted through said openings in order to hold the first cap and the second cap together. The invention also relates to a method for implementing the fastener according to the invention.

Abstract: The present invention concerns a fastener (110) for the temporary assembly of at least two previously drilled structures (112) comprising: a hollow body (122) comprising a bearing surface (40); elastic clips (24) which are movable relative to the body and which form a projection relative to the bearing surface; a spacer (26) around which the elastic clips are positioned; a connecting element (130), extending within the body and secured to the elastic clips (24); and an actuating element (132) linked to connecting element by a thread/tapping (67, 84). The connecting element is traversed by a lateral opening (70) axially extended between two closed ends (72, 74); and the fastener also comprises a transverse stop (28) secured to the spacer, the said stop being capable of sliding between the axial ends of the said lateral opening.

Abstract: An installation tool for a fastener of the “pull screw” type, comprising a breakable gripping element includes a body, a first sleeve movable axially and rotationally in the body that can drive the gripping element, a second sleeve movable axially in the body and immovable in rotation, and a driving device provided with a turning shaft. The shaft comprises a first free wheel for driving the first sleeve in rotation, a second free wheel, and a driving element positioned coaxially around the second free wheel. The driving element cooperates using a helical link with the second sleeve. The first free wheel drives the first sleeve in rotation in a first rotation direction of the shaft. The second free wheel brings the driving element in rotation in a second rotation direction of the shaft to move the second sleeve axially, allowing full setting in a single operating sequence.

Abstract: 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 (12) and a smooth shank (14) extending along an axis of revolution, characterized in that the shank comprising at least one conductive portion (24) and one lubricating portion (22) 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.

Abstract: The invention relates to a method for manufacturing an equipment part, comprising the following steps: providing a substrate, an upper face of which includes a large main surface; providing a computer model comprising spatial coordinates of said main surface and a second portion of the equipment part; then additive manufacturing of the second portion from the main surface, so as to secure said main surface and said second portion; then cutting in a thickness of the substrate to obtain a thin plate including the main surface secured to the second portion of the equipment part.

Abstract: The present invention concerns a fastening socket (112) for assembling at least two previously drilled structures, said socket comprising a substantially cylindrical body (34) and an enlarged head (35); said enlarged head comprising first mounting surfaces (42, 46) suitable for being assembled to a first installation component and for preventing said first installation component from rotating about the main axis. The socket comprises a first substantially cylindrical recess (40) extending along the main axis from the first end, said first recess ending at a planar shoulder (44) substantially perpendicular to said main axis, the first recess and the planar shoulder being received inside the enlarged head, the first mounting surfaces (42, 46) being formed by an inner surface of the first recess.

Abstract: The present invention relates to a locking device (10), comprising a threaded rod (12) and a tapping tube (14), which are movable relative to each other. An outer surface of the tube includes a first anti-rotation form. The device further comprises: a locking sleeve (16) positioned around the rod and comprising a second anti-rotation form (60, 62) capable of being assembled to the first anti-rotation form; and an elastic element (18) connected to the locking sleeve. In a locked position, the first (38, 40) and second (60, 62) anti-rotation forms are assembled; and in a release position, said anti-rotation forms are axially spaced apart, whereby the tube is free to rotate relative to the sleeve.

Abstract: The invention relates to a positive locking fastener comprising: a screw (1), a threaded portion (11) of which has a blind hole (110) and a groove (111); a nut (2) having a tightening portion (21); a cap (3); and a pin (4). The cap (3) has an immobilizing portion (31) intended to engage with the tightening portion (21) and a locking portion (32) intended to cooperate with the blind hole (110) to prevent said cap from rotating relative to the screw (1). The locking portion (32) also comprises openings (322) suitable for allowing the pin (4) to be inserted into said openings and into the groove (111) in order to hold the screw (1) and the cap (3) together.

Abstract: The invention relates to a locking device (300) comprising: a shaft (24) comprising a first thread (22); and a nut (12) and a ring (13) to be assembled on the shaft; the nut comprising a first inner thread (18) defining a first radial clearance with the first thread of the shaft; the nut further comprising a second inner thread (20) in the opposite direction to the first inner thread, the ring (13) comprising a second thread (40) defining a second radial clearance with the second inner thread of the nut; the ring comprising a third inner thread (38) 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.

Abstract: The present invention relates to a unit (10) for a locking device, including: a nut (12) comprising first (18) and second (20) coaxial taps in opposite directions; and a ring (13); said ring including a third tap (38); the first (18) and third (38) taps being capable of engaging with a single first thread (22); said ring including a second thread (40) capable of engaging with the second tap (20) of the nut. A portion (33) of the ring, projecting relative to the second thread (40), includes a through-hole (60); and a surface (16) of the nut includes a visual marking, configured to be opposite the hole (60) 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.

Abstract: The invention concerns a unit (210) for a locking device, comprising: a nut (212) comprising two coaxial taps in opposite directions; and a ring (213); said ring including a third tap (38); the first (18) and third (38) taps being capable of engaging with a single first thread (22); said ring including a second thread (40) capable of engaging with the second tap (20) of the nut. The unit further comprises a washer (214) configured (274) so as to be inserted around one (212) of the nut and the ring, the washer comprising an elastic engagement means (272) for engaging with the other (213) 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.