Abstract: The invention relates to a cage nut device (10) comprising: a nut (11) comprising a tubular body (12) connected to a flange (15), substantially planar and orthogonal to the body, a nut support (20) comprising a nut cage (23) forming an internal housing (28) able to accommodate the nut, the support also comprising a tubular portion, such that the flange of the nut can be inserted into said internal housing, characterized in that an external surface of the tubular portion of the nut support comprises longitudinal splines (22) having a diameter smaller than the diameter of the bore, and at least two longitudinal ribs (44) having a diameter greater than the diameter of the bore. The invention also relates to a method for installing such a device.

Abstract: The invention relates to a securing device (10) for a structure (11) having an open-ended cylindrical bore (13a), the securing device comprising: an insert (15) comprising a tapped tubular body (16) and a head (18), the extremity (20) of the body opposite the head comprising an annular cavity holding a ring (21) made of a plastic material; a pin (22) comprising a cylindrical tapped rod (16) assembled with the tapping of the insert and a head (23), the extremity (30) of the cylindrical threaded rod being tapered; the device being characterized in that the threaded rod is introduced into the insert on the ring side such that, in the assembled state, the head of the insert and the head of the pin form the terminal ends of the securing device (10). The invention also relates to an assembly for the installation of such a device, and also to an installation method.

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 distribution of load stresses on threads engaged with a standard screw or nut is very unequal. Indeed, the first threads in engagement support a large majority of the load. So if the load is too important, the threads give way and the function is not provided any more by the screw or the nut. In the prior art, threads are known whose depth or pitch varies a lot in order to cause a self-clamping. In particular, the invention aims at optimizing the resistance and the fatigue resistance of the screws by distributing the load at the very best on their threads without causing this self-clamping. It was shown that the control of the pitch variation, within a chosen pitch tolerance, makes it possible to control the stress distribution on the threads. It is possible to determine a different variation for each load case encountered.

Abstract: A family of devices attach elements previously bored in a cylindrical manner, wherein each device has a in extending along an axis and a tapered shaft and a head, and a bushing intended for accommodating the shaft of the pin, the bushing extending along the same axis having an outer cylindrical surface and an inner tapered surface. The family has at least two devices with bushings presenting, before installation by interference, an identical outer diameter and a different rate of taper of the inner surface.

Abstract: The invention relates to a tool (15) for installing fasteners, said tool comprising: a sheath containing a cylindrical housing (18) with a polygonal base, a roller cage (19) accommodated within said cylindrical housing, said cage comprising: a cylindrical support (33) with a substantially circular base, capable of pivoting within the cylindrical housing. rollers (34) disposed on the perimeter of the support, each roller being able to rotate with respect to said support, compressing spring (36) exerting a radial force on the rollers in the direction of the main axis, the tool further comprising a restoring member (37) tending to bring the rollers of the cage to face the edges (27) of the cylindrical housing of the sheath.

Abstract: The invention relates to a quick-release fastener (100) of the ball-pin type, consisting of a tubular body (102) provided with a radial opening (108), an enlarged head (104), a rod (112) that can move axially within the body and through the head, a ball (110) capable of moving radially between a released position in which it rests in a reduced cross-section (132) of the rod (112) inside the body and a locked position in which it protrudes radially beyond the body through the radial opening (108), and a lever (114) that pivots about a pin (118), which lever includes at least one cam surface (142) that is in contact with the head. The rotational actuation of the lever draws the rod toward the head and causes the ball to move into the released position.

Abstract: 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.

Abstract: The invention relates to a lock (100) comprising: -two substantially planar walls (101) bearing a first pivot connection axle (102) and a second pivot connection axle (103), the first and second axles being substantially perpendicular to the planes; -a catch (108) able to pivot about the first axle, the catch comprising a hook (109) able to catch a strike wire; -a pawl (111) able to pivot about the second axle, the pawl comprising a tooth (112) able to engage with at least one notch (113, 114) formed on the catch, when the lock is in what is known as the closed position; -a control lever (115) able to pivot about the second axle, the lever comprising a means (116) of driving the rotation of the pawl (111) about the second axle, the control lever comprising means (118, 119) for securing the closure of the lock.

Abstract: A rivet for blind fastening may include a screw with a handling element, a break groove, a head separated from the handling element by the break groove, and a threaded part; a sleeve with a collar and a tubular shank comprising an internal thread intended to come into engagement with the threaded part of the screw. The handling element comprises a first handling portion able to guide the introduction of the rivet in a setting tool, and a second handling portion able to transmit a torque, the two handling portions being separated by blocking portion able to limit an axial movement of the rivet in a setting tool. A setting nose for installing such a rivet, and a setting method are also described. These in particular are applicable to the assembly of aircraft structures.

Abstract: The invention relates to a quick-release fastener (100) of the ball-pin type, consisting of a tubular body (102) provided with a radial opening (108), an enlarged head (104), a rod (112) that can move axially within the body and through the head, a ball (110) capable of moving radially between a released position in which it rests in a reduced cross-section (132) of the rod (112) inside the body and a locked position in which it protrudes radially beyond the body through the radial opening (108), and a lever (114) that pivots about a pin (118), which lever includes at least one cam surface (142) that is in contact with the head. The rotational actuation of the lever draws the rod toward the head and causes the ball to move into the released position.

Abstract: The invention refers to a family of fastening devices including at least two fastening elements (101, 121), each one of said elements including a shaped end portion (105), a frontal face (106) of the shaped end portion (105) having a cavity (107) extending as far as a bottom (108), the fastening elements having different maximum grips (Gmax), the family being configured so that the distance (109?) between the bottom (108) of the cavity (107) and the limit (170) between the body and the shaped end portion is identical for all the fastening elements (101, 121). The invention refers moreover to a unit (100) including such a family of fastening devices and a check gauge (150), as well as a method for checking of the choice of the length of a fastening element (101, 121), by means of the check gauge (150).

Abstract: A fastening device for preassembling structural members includes a hollow cylindrical body; a bearing ring provided at a proximal end of the hollow body and against which one of the structural members is intended to bear in a fastening position; a pulling threaded rod extending through the hollow body to be inserted into the structural members; a tightening means connected to the pulling threaded rod for maintaining the structural members against each other, the tightening means including a removable tubular end piece for mounting on a proximal threaded end of the pulling threaded rod that can be locally axially compacted under the action of a force applied on the pulling threaded rod in order to form a radial bead for sandwiching the structural members between the latter and the bearing ring; the fastening device including a sheath.

Abstract: A method for locking a nut with an inner thread, in which the ultimate tensile strength (Rm) and yield strength (Re) of the material constituting the nut are determined according to temperature. An optimal heating temperature is determined, at which a maximum of a relative plastic interval of the material is reached, said relative plastic interval being defined by the formula (Rm?Re)/Rm, and a maximum heating time is determined, above which the nut presents the risk of deterioration of its microstructure and/or of its initial mechanical strength. The nut is heated to a temperature substantially equal to said optimal temperature and for a heating time of less than said maximum time so that the initial microstructure and mechanical strength of the material constituting the nut are preserved, and a body of the nut is deformed locally by bending.

Abstract: A device (1; 20; 51) for assembling pre-bored (15) elements (2; 3), the elements together having a reference thickness (18) that may vary up to an actual maximum thickness (40), may include a male element (4; 21; 52) having a shank (6; 22; 54) extending in a thread (11; 27) or swaging grooves (59), an external surface (12; 28; 60) having a height (13; 61) equal to a height (14) of the shank, chosen so as to correspond to at least the actual maximum thickness (40) of the elements to be assembled, wherein the external surface has a visual reference mark (16; 35; 63), located at a distance (17) of a lower limit (9; 34; 57), or extending over a distance (17) from a lower limit up to an upper limit (42A; 42B; 65) toward the head.

Abstract: The invention relates to a pressure relief latch for aircraft, able to absorb vibrations and shocks without inopportune opening, as well as to adapt to dimensional stresses during its assembly. The latch includes: a console, a lever mounted on the console, and an opening effort exerted on a fulcrum of the lever causing an angular displacement of the fulcrum between a closing position and an opening position. The latch also includes a roller able to roll against a profile of the lever and connected to an elastic return device. The latch further being provided with means able to vary the angular displacement of the fulcrum of the lever according to the opening effort, with two different slopes according to an opening effort E1.

Abstract: The invention relates to a fastening device (100) comprising: a bolt (107) with a head (108) and a shaft (109); a sleeve (111) comprising a head (112) able to house the head of the bolt and a body (113) able to house the bolt shaft, the sleeve body having an inner diameter smaller than the bolt shaft diameter; a ring (116) in solid and compressible material, attached to an outer surface (115) of the sleeve body and positioned near the sleeve head, said outer surface being able to contact a wall (106) of a drilled hole (103) made in a structural component, said ring being able to be compressed between said outer surface and said wall.

Abstract: The invention concerns a family of insertable temporary fasteners (100) comprising the following: a body (101) with a bearing face (102) at least one clip (103) with a hooking spur (104) a threaded rod (105, 205) connected to the clip, with a control nut (107, 207) screwed onto the said rod The family comprises at least two temporary fasteners (100) with different diameters and nuts with different lengths (116). The invention also concerns a set comprising such a family of fasteners, along with an installation device (13) comprising a means (26, 30) of detecting the length of the nut. The invention enables the installation device to automatically determine the appropriate tightening torque when installing the fastener based on the length of the nut.