Patents Assigned to LISI AEROSPACE
  • Patent number: 11867213
    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.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: January 9, 2024
    Assignee: LISI AEROSPACE
    Inventor: Julien Brachet
  • Patent number: 11826816
    Abstract: This relates to a method for the quality control of a blind fastener installation in a structure comprising a sleeve and a core bolt, with a deformation of a rear side of the structure, a signal being generated during the installation process. The process includes a) identification of two notable points of the signal, chosen among: pulling start point (S1); buckling (B1) of the sleeve; contact (B2, S2) of the sleeve or of the core bolt; force setpoint (B3) or fracture (S3) of a portion of the core bolt; b) estimation of a first parameter as a function of a notable point, characterizing a bulb in contact with the rear side; c) estimation of a second parameter as a function of a notable point, characterizing a tension applied in the core bolt; and d) for each estimated parameter, comparison with a condition that indicates the proper installation of the fastener.
    Type: Grant
    Filed: March 7, 2022
    Date of Patent: November 28, 2023
    Assignee: LISI AEROSPACE
    Inventors: Dimitri Billaud, Benoit Regnard
  • Patent number: 11772210
    Abstract: A fastener installation tool and method for interference fit, said fastener (10) comprising a head and a grasping element, said tool comprising a first body (30) extending along a first main axis and having: —at least one load-reacting surface, of which one also constitutes a surface for the application of a load; —a load transmission surface, and—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 (30) 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.
    Type: Grant
    Filed: April 11, 2022
    Date of Patent: October 3, 2023
    Assignee: LISI AEROSPACE
    Inventors: Martial Broucke, Aurélien Montier
  • Publication number: 20230302490
    Abstract: A metal component (112) made of a base metal and a coating system (500) thereon is characterized in that the coating system comprises a conductive layer (502) on the base metal and a resin-based layer (504) including conductive pigments (508) on the conductive layer. The conductive pigments (508) 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 (500) 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.
    Type: Application
    Filed: August 2, 2021
    Publication date: September 28, 2023
    Applicants: HI-SHEAR CORPORATION, LISI AEROSPACE
    Inventors: HAIKHANH PHAM, LAURENT BOURGES, JOHAN STEPHAN
  • Patent number: 11713104
    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.
    Type: Grant
    Filed: March 16, 2021
    Date of Patent: August 1, 2023
    Assignee: LISI AEROSPACE
    Inventors: Jimmy Antoine, Vincent Defrance
  • Patent number: 11673195
    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.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: June 13, 2023
    Assignee: LISI AEROSPACE ADDITIVE MANUFACTURING
    Inventors: Bruno Sébastien Eyrignoux, Fabian Magnin
  • Patent number: 11629746
    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.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: April 18, 2023
    Assignee: LISI AEROSPACE
    Inventors: Martial Broucke, Gildas Boleis, Alan Philippe, Pierre Petit
  • Publication number: 20230021445
    Abstract: The invention relates to a fastener (10) for the temporary assembly of structures (12, 13), comprising: a tubular body, extending between a first end and a second end comprising at least two longitudinal tabs (46); a hooking element, rotationally prevented and capable of sliding axially in the body, said fastening element comprising a tubular base and a plurality of elastic clips (62) connected to one end of said base, each clip comprising a hooking spur (74); a driving device for the fastening element; and a spreader (26) fixed relative to the body, the plurality of elastic clips being positioned around said spreader. The tubular base (60) comprises two longitudinal grooves in an outer surface; and the fastener is configured so that each tab (46) of the body is capable of sliding axially in one of said grooves.
    Type: Application
    Filed: July 6, 2022
    Publication date: January 26, 2023
    Applicant: LISI AEROSPACE
    Inventors: JULIEN BRACHET, VINCENT DEFRANCE
  • Patent number: 11560910
    Abstract: The invention relates to a method for installing metallic fastener (10; 40) for the interference fit assembly of at least two structural elements (20, 22) comprising a through hole, the fastener comprising an enlarged head (12; 42), a shaft (14; 44) having an external diameter before installation that is greater than an internal diameter of the hole, said shaft comprising a conductive surface (26; 56). Before installation, at least the conductive surface (26; 56) is coated with a lubricating layer (30), which comprises a mixture of at least one polyolefin and one polytetrafluoroethylene, for example, having sufficient adherence to prevent its abrasion by manual manipulation of the fastener and being weak enough to be at least partly stripped from the conductive surface during the interference fit assembly of the fastener. The invention is applicable to the assembly of aircraft structures.
    Type: Grant
    Filed: January 14, 2020
    Date of Patent: January 24, 2023
    Assignee: LISI AEROSPACE
    Inventors: Laurent Bourges, Johan Stephan, Christophe Van Daele
  • Patent number: 11519450
    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.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: December 6, 2022
    Assignee: LISI AEROSPACE
    Inventors: Gildas Boleis, Alan Philippe, Pierre Petit, Martial Broucke
  • Patent number: 11466723
    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.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: October 11, 2022
    Assignee: LISI AEROSPACE
    Inventors: Gildas Boleis, Alan Philippe, Pierre Petit, Martial Broucke
  • Publication number: 20220299061
    Abstract: The invention relates to a fastener comprising a substantially right circular cylindrical surface arranged along an axis, said surface comprising a grooved shape selected from a thread, a tapping and a plurality of traction grooves, said fastener being made of a beta-metastable titanium alloy. The alloy has a microstructure (40) made up of a matrix (42) and alpha phase nodules (44) distributed in said matrix, the matrix being made up of beta phase and groups (46) of alpha phase lamellae (48) oriented in the same direction.
    Type: Application
    Filed: September 15, 2020
    Publication date: September 22, 2022
    Applicant: LISI AEROSPACE
    Inventor: GUILLAUME LEGER
  • Patent number: 11448253
    Abstract: The invention relates to a positive locking fastener comprising: a screw (1) having a radial hole (120) at a threaded portion (12); a nut (2) having a tightening portion (21); a cap (3); and a pin (4). The cap has a locking portion (31) intended to cover the threaded portion and a blocking portion (30) intended to engage with a tightening portion of the nut. The blocking portion comprises at least one pair of diametrically opposed openings (32) suitable for allowing a pair of openings to be aligned with the radial hole, in order to allow the pin to be inserted and thus lock the fastening regardless of the relative position of the nut with respect to the screw. The invention also relates to a method for implementing the fastener according to the invention.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: September 20, 2022
    Assignee: LISI AEROSPACE
    Inventors: Mohamed Abou Halima, Loïc Meiffre
  • Publication number: 20220288670
    Abstract: This relates to a method for the quality control of a blind fastener installation in a structure comprising a sleeve and a core bolt, with a deformation of a rear side of the structure, a signal being generated during the installation process. The process includes a) identification of two notable points of the signal, chosen among: pulling start point (S1); buckling (B1) of the sleeve; contact (B2, S2) of the sleeve or of the core bolt; force setpoint (B3) or fracture (S3) of a portion of the core bolt; b) estimation of a first parameter as a function of a notable point, characterizing a bulb in contact with the rear side; c) estimation of a second parameter as a function of a notable point, characterizing a tension applied in the core bolt; and d) for each estimated parameter, comparison with a condition that indicates the proper installation of the fastener.
    Type: Application
    Filed: March 7, 2022
    Publication date: September 15, 2022
    Applicant: LISI AEROSPACE
    Inventors: DIMITRI BILLAUD, BENOIT REGNARD
  • Patent number: 11441591
    Abstract: This invention relates to a pin comprising a head (22) and a threaded portion, an end of the head forming an end surface (32) on a first plane perpendicular to the main axis. The pin further comprises a handling component (30) which is an integral part of the head, a junction (50) between that head and the handling component comprising a breakneck groove (52) with a rotational shape. A section of the breakneck groove has an arc of circle portion (60), a center (68) of that circle primarily in the first plane, so that a plane containing the breakneck groove (52) surface clearly coincides with the first plane.
    Type: Grant
    Filed: September 1, 2019
    Date of Patent: September 13, 2022
    Assignee: LISI AEROSPACE
    Inventor: Jérôme Couderc
  • Publication number: 20220234149
    Abstract: A fastener installation tool and method for interference fit, said fastener (10) comprising a head and a grasping element, said tool comprising a first body (30) extending along a first main axis and having: —at least one load-reacting surface, of which one also constitutes a surface for the application of a load; —a load transmission surface, and—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 (30) 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.
    Type: Application
    Filed: April 11, 2022
    Publication date: July 28, 2022
    Applicant: LISI AEROSPACE
    Inventors: MARTIAL BROUCKE, AURÉLIEN MONTIER
  • Patent number: 11384575
    Abstract: The invention involves a keeper (20) to interact with a bolt (16) of a lock (10); The keeper includes a bracket (22) for attachment to a structure, and a keeper rod (24) secured to the bracket, the keeper rod extending from one surface (27) of the bracket. In the keeper, a shaft (32) is attached to the bracket and can rotate freely relative to the bracket such that it extends in a longitudinal direction (X); a blade (40) is mounted on the shaft (32) on one side of the bracket near the keeper rod in such a way as to always rotate along with the shaft; an angular position indicator (46) is also mounted so as to always rotate along with the shaft; the blade being so positioned that it can be rotated by the latch when the latch hooks on to or releases from the keeper rod, and the angular position indicator (46) being capable of indicating the angular position of the blade. The invention is for example intended to be used on an aircraft door such as that of a helicopter.
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: July 12, 2022
    Assignee: LISI AEROSPACE
    Inventors: Bastien Bellavia, Boris Hummel
  • Patent number: 11365757
    Abstract: A fastener for assembling at least two structural elements having an aperture, may have a fastener comprising an enlarged head (12) and a shank (14) exhibiting, prior to fitting, an outside diameter (D1) greater than an inside diameter (DS) of the aperture, and a locking portion comprising a screw thread or annular grooves. The fastener further comprises a lubricating sacrificial ring (40) on the exterior surface of the fastener, extending at least between a distal end of the shank and a proximal end of the locking portion, said ring having, before the fastener is fitted into the structure, an outside diameter greater than a diameter of the aperture. The sacrificial ring comprises a polymer resin forming a matrix encapsulating dispersant molecules and oil molecules. The fastener assembly may apply to the assembly of aircraft structures.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: June 21, 2022
    Assignee: LISI AEROSPACE
    Inventors: Alexandre Berthou, Florent Verdier, Charles Pham
  • Patent number: 11359662
    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.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: June 14, 2022
    Assignee: LISI AEROSPACE
    Inventor: Loïc Meiffre
  • Patent number: 11353054
    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.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: June 7, 2022
    Assignee: LISI AEROSPACE
    Inventors: Julien Goyer, Mohamed Abou Halima, Loïc Meiffre