Abstract: Nut retaining devices and related methods are disclosed. An exemplary nut retaining device may include a housing defining an interior receptacle, the housing including attachment structure configured for fixing the housing to a base structure; a nut received within the receptacle and having screw threads for engaging a threaded fastener; retaining structure engageable with the nut and retaining the nut within the receptacle; anti-rotation structure between the housing and the nut constraining the nut against rotation relative to the housing; the anti-rotation structure configured to provide a clearance movement between the nut and the housing in at least one of a rotation direction rotationally about the screwing axis of the nut, or an axial direction parallel to the screwing axis of the nut, or a radial direction relative to the axial direction that is parallel to the screwing axis of the nut.

Abstract: A nut includes locking jaws, a floating end of which is actuated by cam profiles inside a rotary actuation ring. The jaws are produced by removing material from the body of the nut, and shift from a locking state to a release state and vice versa by elastic bending deformation. A locking surface on the inside of the jaws has the same thread as the body of the nut.

Abstract: A locking fitting assembly that can be removably installed in a tapped hole on a housing and resists unintended loosening of the fitting assembly. The fitting assembly maybe installed at a mounting location for receiving the fitting assembly, and includes abase with engagement structure configured to engage corresponding structure adjacent the mounting location to secure the base against rotation. The fitting assembly further includes a nipple fitting received on the base and having first and second oppositely disposed coupling features. The first coupling feature is configured to mate with a complementary coupling feature of the housing, such as the tapped hole, whereby the nipple fitting can be sealingly secured to the housing. Locking structure disposed between the base and the nipple fitting is configured to resist relative rotation between the base and the nipple fitting.

Abstract: A fluid-tight fitting includes at least one strain gauge or includes at least one passage, said passage extending radially through a nut and communicating with an interior chamber defined by a first conduit, a second conduit, and the nut, or includes a visual indicator associated with at least one of a nut or a first conduit of the fitting.

Abstract: A nut is prevented from turning during screwing by a body attached to one of the parts to be tightened by rivets. The body prevents the nut from rotating via a ring coupled without clearance with the nut and coupled with radial clearance to the body, in order to allow the nut to self-position itself along the axis imposed on the screw by the bores traversed by the screw. The nut can thus be a standard nut or a floating cage nut. Application to the retaining of nuts that are inaccessible and/or require a high level of security against unintentional unscrewing.

Abstract: A sealing device in the form of a plug that is receivable in a threaded hole of a case includes a threaded central body, a skirt connected to the central body, and locking/unlocking means that opposes spontaneous unscrewing of the plug and is automatically activated by rotation of the plug and corresponding movement along an axis. The locking/unlocking means includes a first releasable coupling component coupled for rotation with the central body, and a second releasable coupling component facing the first coupling component at least during screwing and unscrewing. In at least in a tightened condition of the plug, the second coupling component is secured against rotation relative to the case by rotation restricting means located inside the threaded bore. In the screwed condition, an annular end face of the skirt bears against a bearing face of the second releasable coupling component to transmit tightening thrust to the case.

Abstract: A nut for securing first and second pipe end-pieces together includes a nut lock having a stop member secured to the nut body, and a second element which is rotatable inside the nut body and having a locking feature adapted to lock onto a corresponding locking structure of the second end-piece. The stop member and the second element include corresponding face teeth which are urged to intermesh by an axial compression spring. At or near the tightened condition of the assembly, the second element is locked onto the second end-piece so that rotation of the nut is possible only if the torque applied exceeds a given threshold, for which the face teeth jump over each other while the spring is alternately stressed. A compact design is obtained with the lock positioned at the rear of the nut thread. The clamping face is axially between the nut thread and the lock.

Abstract: A self-locking screwing attachment device. In one embodiment, the device includes a first element having an inner thread, the first element being screwed onto a threaded tip. In other embodiments, the first element has an outer thread and can either be made of a hollow body or have a closed end so as to constitute, for instance, a borescope.

Abstract: The invention relates to a shut-off device comprising a plug intended to be placed over a threaded orifice of a casing, or to be removed therefrom, by screwing and unscrewing respectively, the plug comprising a central body bearing a screw thread, and locking and unlocking means that oppose the spontaneous unscrewing of the plug and that are activated automatically by the turning of the plug and its corresponding progression in the direction of screwing along a longitudinal axis. The locking and unlocking means comprise two releaseable coupling members, of which a first member is coupled to and turns with the central body via a protective skirt and of which a second member can be prevented from turning with respect to the casing during screwing.

Abstract: The device connects a first end-coupler with a second end-coupler, in particular of a piping. A nut is provided with a threaded bore in which the first end-coupler is screwed along a longitudinal axis. In a tightening position, the first end-coupler is in axial stress with a second end-coupler accommodated in the nut. Anti-rotation means are provided between the nut and at least one of the end-couplers to prevent relative rotation except when a torque exceeding a predetermined threshold is applied thereto. The anti-rotation means consist of at least one tab made in the material of the nut to lockingly interfere with substantially planar faces formed on the second end-coupler.

Abstract: The device connects a first end fitting to a second end fitting, particularly of a pipe. A nut is provided with a threaded bore into which the first end fitting is screwed along a longitudinal axis. In the tightened position, the first end fitting is axially stressed relative to the second end fitting housed in the nut. Rotation-proofing structure is provided between the nut and at least one of the first and second end fittings hereafter referred to as the locking end fitting. The rotation-proofing structure includes at least one strip arranged around the locking end fitting. The strip comprises at least one protrusion radially penetrating into at least one concavity.

Abstract: The device connects a first end-coupler with a second end-coupler, in particular of a piping. A nut is provided with a threaded bore in which the first end-coupler is screwed along a longitudinal axis. In a tightening position, the first end-coupler is in axial stress with a second end-coupler accommodated in the nut. Anti-rotation means are provided between the nut and at least one of the end-couplers to prevent relative rotation except when a torque exceeding a predetermined threshold is applied thereto. The anti-rotation means consist of at least one tab made in the material of the nut to lockingly interfere with substantially planar faces formed on the second end-coupler.

Abstract: The invention relates to a self-locking screwing attachment device (1a, 1b) including a nut (2a, 2b) screwed onto a threaded tip (3a, 3b) extending in a screwing axis (X), characterized in that the nut (2a, 2b) includes: a first element (6a, 6b) rotating relative to the tip (3a, 3b) when screwing; a second element (13a, 13b) rotatably engaged with the tip (3b) or an adjacent part (5) to be assembled, the tip (3a) passing therethrough; a stop member (23a, 23b) rotatably secured to the first element (6a, 6b); a releasable coupling means (26a, 26b, 27a, 27b, 28a, 28b) between the stop member (23a, 23b) and the second element (13a, 13b), the nut also being provided with an area for direct clamping between a first clamping surface (20a, 20b) of the first element (6a, 6b) and a second clamping surface (21a, 21b) of the second element (13a, 13b), when the second element (13a, 13b) axially engages with the tip (3a, 3b) or said adjacent part (5) to be assembled.

Abstract: The invention relates to a shut-off device comprising a plug intended to be placed over a threaded orifice of a casing, or to be removed therefrom, by screwing and unscrewing respectively, the plug comprising a central body bearing a screw thread, and locking and unlocking means that oppose the spontaneous unscrewing of the plug and that are activated automatically by the turning of the plug and its corresponding progression in the direction of screwing along a longitudinal axis. The locking and unlocking means comprise two releaseable coupling members, of which a first member is coupled to and turns with the central body via a protective skirt and of which a second member can be prevented from turning with respect to the casing during screwing.

Abstract: The device connects a first end fitting to a second end fitting, particularly of a pipe. A nut is provided with a threaded bore into which the first end fitting is screwed along a longitudinal axis. In the tightened position, the first end fitting is axially stressed relative to the second end fitting housed in the nut. Rotation-proofing means are provided between the nut and at least one of the first and second end fittings hereafter referred to as the locking end fitting. The rotation-proofing means consist of at least one strip arranged around the locking end fitting. The strip comprises at least one protrusion radially penetrating into at least one concavity.

Abstract: The invention relates to a self-locking screwing attachment device (1a, 1b) including a nut (2a, 2b) screwed onto a threaded tip (3a, 3h) extending in a screwing axis (X), characterised in that the nut (2a, 2b) includes: a first element (6a, 6b) rotating relative to the tip (3a, 3b) when screwing; a second element (13a, 13b) rotatably engaged with the tip (3b) or an adjacent part (5) to be assembled, the tip (3a) passing therethrough; a stop member (23a, 23b) rotatably secured to the first element (6a, 6b); a releasable coupling means (26a, 26b, 27a, 27b, 28a, 28b) between the stop member (23a, 23b) and the second element (13a, 13b), the nut also being provided with an area for direct clamping between a first clamping surface (20a, 20b) of the first element (6a, 6b) and a second clamping surface (21a, 21b) of the second element (13a, 13b), when the second clement (13a, 13b) axially engages with the tip (3a, 3b) or said adjacent part (5) to be assembled.

Abstract: A locking device (1) is fixed to a nut (4) and includes a coupling unit (42) insertable into a hexagonal configuration (11) of a spigot end (2) at a reduced axial distance being coupled by mutually interpenetrable gears (49, 51) with a stop unit (38) which axially slides in a body (18) opposite to a compression spring (36). The gears (49, 51) are symmetric and are insertable into each other with a predetermined elastic resistance by the action of compression or loosing torque. The device is embodied in one piece which is mounted by assembling with the nut without affecting the spigot ends (2, 3).

Abstract: A locking device (1) is fixed to a nut (4) and includes a coupling unit (42) insertable into a hexagonal configuration (11) of a spigot end (2) at a reduced axial distance being coupled by mutually interpenertratable gears (49, 51) with a stop unit (38) which axially sliding in a body (18) oppositely to a compression spring (36). The gears (49, 51) are symmetric and are insertable into each other with a predetermined elastic resistance by the action of compression or loosing torque. The device is embodied in one piece which is mounted by assembling with the nut without effecting the spigot ends (2, 3). The device is used for locking a coupling in a systematic manner and makes it possible to unlock it without any preliminary voluntary operation.

Abstract: An anti-rotation locking unit includes a support member having a mounting portion, a lock-support portion and first engagement part; a locking member having a bearing portion movably supported by the lock-support portion between a locking position and a release position, a coupling formation, and second engagement part, where in the locking position, the first and second engagement parts are mutually engaged so as to prevent rotation of the locking member with respect to the support member; and a return part mounted operatively between the locking member and the support member for biasing the locking member into the locking position, the first and second engagement parts arranged as abutment parts preventing axial movement of the locking member with respect to the support member beyond the locking position.

Abstract: An obturating device including a body (11) with a recess (8) at one end engageable by a spanner, and a screw thread (2) at the other end for engaging a complementary screw thread (7) in an opening (6) of a housing (3). A locking ring (31) biased by a spring in the obturating device (1) and a complementary locking ring (47) in the opening have asymmetrical teeth which interlock when screwing-in is complete and snap together to prevent loosening of the rings. The tooth flanks that engage one another on loosening are nevertheless sufficiently angled to enable forced unscrewing using a spanner. A skirt (14) protects the mechanism and acts as an abutment in the fully screwed-in position. The obturating device enables locking and unlocking, requires no direct manual operation and is particularly suitable for endoscope insertion openings in aircraft engines.