Abstract: A screw comprising, in succession between a first end and a second end thereof: a first polygonal head; a breakable neck; a second polygonal head; and a threaded shank; the diameter of the breakable neck being smaller than the diameters of the heads and of the shank, the screw further comprising a cylindrical bearing surface portion situated between the breakable neck and the second head, and having a diameter not less than that of the breakable neck, but less than that of the second head. A tool for tightening such a screw comprises a tightening endpiece including resilient means that project radially into the inside of the tube while they are in the free state, and that are capable of retracting to allow the first head of the screw to be inserted as far as the engagement portion of the tube and to co-operate with the cylindrical bearing surface portion of the screw when the first head thereof is in said engagement portion.

Abstract: The present invention relates to a process for shrinking a ring to be shrunk, placed around an object to be clamped on a cylindrical support and behind an axial obstacle connected to said support. The process comprises the following steps of: a) fitting a shrinking tool around the support, over the axial obstacle, until its jaws in expanded position are disposed in the radial plane of the ring to be shrunk, b) positioning in the jaws, by the rear of the axial obstacle, a spacer presenting a central opening adapted to the ring to be shrunk, and c) finally, tightening the shrinking tool to bring the jaws and the spacer that they contain in their retracted positions.

Abstract: A clamp fitting is formed by a metal band wound on itself. One end of the band presents an ear radially projecting on the outer periphery of the clamp. The other end of the band is shaped as a hook capable of hooking behind the ear to maintain the clamp in a tightened position. After hooking, on the face of the metal band located opposite the hook bearing zone, the ear is provided with a member integral therewith and of which a zone is capable of coming into stop contact with the inner face of the hook when the latter is being hooked on the ear. This additional contact with the inner face of the hook prevents any relative displacement of the hook with respect to the ear and consequently any increase in the tightening of the clamp.

Abstract: This invention relates to a connector of a quick connection allowing tight connection of a rigid tube provided, at some distance from its free end intended to be fitted in the inlet of the connector, with a bead projecting radially with respect to the outer surface of the tube and presenting a substantially radial side opposite said end. The connector presents a first inner housing comprising an O-ring capable of coming into contact with the outer surface of the tube between its free end and its bead and a second inner housing to receive a locking ring elastically deformable in the radial direction. The locking ring is formed by a thin metal band presenting a generally oblong profile, the central region of said ring being constituted by substantially cylindrical portions whose diameter in the free state is at the most equal to the diameter of the tube.

Abstract: A clamp fitting is formed by an internal segment of metal band wound upon itself, and an external segment of metal band formed about a portion of the internal segment. The internal segment extends for more than one complete circumference such that the outer end of the internal segment overlaps the internal end of the internal segment to form a continuous internal surface. The outer end of the internal segment presents an ear formed by two folds of band placed back to back and projecting radially on the outer periphery of the clamp. The external band segment extends only for a partial circumference. One end of the external segment is attached to the outer face of the internal segment. The other end of the external segment is shaped as a hook capable of hooking behind the ear to maintain the clamp in a tightened position.

Abstract: A quick connector is provided for connecting a tube inserted into a connection element. The tube includes an annular swell spaced at a distance from its end. The connector housing of the connection element is provided with a locking member and locking ring elastically deformable in a radial direction between a free state configuration and an unlocking configuration. The outer periphery of the connector housing has two cylindrical parts separated by an axial stop. The locking ring abuts the axial stop. A locking lug is connected to the locking ring and includes a front ramp with a transverse slot. A spacer deforms the locking lug in a radially outward direction to the unlocking configuration. When the tube is fitted in the connection element, the front ramp of the locking lug cooperates with the swell of the tube to move the lug apart. When the tube has been fitted in the connector and the slot is at the axial level of the swell, the locking lug approaches its free state configuration.

Abstract: A ring for swaging constituted by a rolled-up length of metal strip whose two ends are bonded together without give rise to significant increased thickness in the bonding zone. The ends of the strip are disposed substantially in contact with each other via their terminal edges, and the thickness of each of said ends is close to half the thickness of the strip. The inside faces of the ends are offset outwardly relative to the inside surface of the ring so as to constitute a housing for a plate whose thickness is close to half the thickness of the strip. A set of complementary studs and holes is provided on the ends of the strip and on the plate, said studs being engaged in the holes and their free ends being riveted to the element opposite from the element carrying them.

Abstract: This invention relates to a band clamp fitting constituted by a metal band wound on itself, presenting, near one of its ends, an ear provided with an extension and, at the other end, a hook. The extension presents a projecting part, of transverse dimension less than that of the free edge of the hook and capable of cooperating with pre-hooking means when the clamp fitting is in non-tightened state. The free edge of the hook presents a notch, of dimensions adapted to those of the projecting part and offset with respect to the latter in the transverse sense of the band. A portion of the free edge of the hook is located in line with the projecting part and is capable of being hooked therebehind.

Abstract: The invention relates to a low-vulnerability explosive munitions element comprising a casing containing a multicomposition explosive charge, the innermost layer of which is a composite explosive comprising a filled polyurethane or polyester polymer matrix, the filling of which contains more than 20% by weight of organic nitrate explosive, and the peripheral layer of which is a pyrotechnic composition of the family of composite solid propellants comprising a filled polyurethane or polyester polymer matrix the filling of which contains at least one mineral oxidant and less than 17% by weight of organic nitrate explosive. The blast and/or bubble effect produced is close to that produced by the much more-vulnerable charge of monocomposition composite explosive of equivalent mass. The invention also relates to a method for obtaining a blast and/or bubble effect by releasing in the casing of an aforementioned munitions element according to the invention, and then rupture of the casing.

Abstract: This invention relates to a clamp constituted by a metal band wound on itself, of which the ends are respectively provided with complementary hooking means comprising, in particular a hook adapted to pass over a lug during the tightening operation, the inner end of the band extending, when the clamp is in closed position, at least beyond the hook. At the base of the lug supporting the hook, there is provided at least one undulation of the band, the maximum distance between the inner face of the undulation and the outer face of the extension of the inner end of the band being at the most equal to the thickness of the band and preferably included between one third and one half of this thickness.

Abstract: A clamp fitting is disclosed, constituted by a metal band wound on itself, whose ends are respectively provided with complementary hooking means, comprising a hook capable of passing behind a shoulder or ear during the clamping operation. The clamp fitting presents at least one group of two undulations, each in the form of an open loop, projecting radially with respect to the outer periphery of the clamp fitting, the zone of join of at least one undulation to the clamp fitting being constituted by a portion of band of circular section, whose radius is at least equal to twice the thickness of the band and which extends over an arc of at least 90.degree. and preferably close to 150.degree..

Abstract: The invention relates to a low-vulnerability explosive munitions element comprising a casing containing a multicomposition explosive charge, the innermost layer of which is a composite explosive comprising a filled polyurethane or polyester polymer matrix, the filling of which contains more than 40% by weight of organic nitrate explosive, and the peripheral layer of which is a pyrotechnic composition of the family of composite solid propellants comprising a filled polyurethane or polyester polymer matrix the filling of which contains at least one mineral oxidant and less than 10% by weight of organic nitrate explosive. The blast and/or bubble effect produced is close to that produced by the much more-vulnerable charge of monocomposition composite explosive of equivalent mass. The invention also relates to a method for obtaining a blast and/or bubble effect by releasing in the casing of an aforementioned munitions element according to the invention, and then rupture of the casing.

Abstract: An attachment clamp for securing a tube, a bundle of cables or like objects on a support is disclosed. A metal strap is wound on itself to constitute an open ring, of which one of the ends presents an extension for the passage of a fixing screw. A plurality of openings, transverse to the strap and constituted by embossed portions, are made in the end of the ring opposite the straight extension, while the other end of the ring bears an elongated tab substantially perpendicular to the straight extension. The free end of the tab is shaped as a hook directed towards the inside of the clamp and capable of being introduced in one of the openings in order to close the clamp.

Abstract: A clamp is disclosed, constituted by a metal band wound on itself, of which the ends are respectively provided with complementary fastening means adapted to be coupled to each other when a tool, for example pliers, is tightening the clamp. The clamp is further provided with an undulation forming a reserve of capacity and being deformable by flattening during tightening. In the zone of connection of the undulation to the band, located towards the inner end of the band, there is provided a gusset for reinforcing this zone of connection.

Abstract: This invention relates to a clamp comprising a metal band wound on itself, of which one of the ends is shaped as a hook and of which the other end presents a projecting lug allowing the free edge of the hook to be fastened. The lug presents a boss on its face serving as bearing for the free edge of the hook after fastening, this boss preferably being located substantially in the middle of the width of the lug, while the free edge of the hook comprises a notch whose shape is complementary to that of the boss of the lug.

Abstract: This device relates to a clamp constituted by a metal band wound on itself, comprising complementary tightening and/or joining elements in the vicinity of each of its ends. The band presents, in a zone preferably remote from the ends, a longitudinal slit thus defining two band sections, parallel and contiguous with respect to each other. On each of the band sections is provided at least one corrugation projecting outwardly of the clamp, each corrugation of one of the band sections being offset circumferentially with respect to each corrugation of the other band section.

Abstract: A torsion damping device in a clutch plate is fitted with an interposing element comprising two movable centrifugal plates. According to the invention, the two movable plates are connected to one another by at least one transmission element which is rotatable relative to the plates in such a way that a radial displacement of one of the movable plates causes rotation of the transmission element and a radial displacement in the opposite direction of the other movable plate.

Abstract: This invention relates to a clamp, adapted to be dismounted and re-used, constituted by a metal band wound on itself, comprising respectively in the vicinity of each of its ends, on the one hand, two radial stops directed outwardly of the band to constitute complementary tightening means adapted to be gripped by a tool of the pliers type, on the other hand, complementary joining means generally in the form of hooks which, in the non-tightened state of the clamp, are at a distance from each other. Each assembly of a tightening means and of a joining means is constituted by a portion of metal band of which the two ends are suitably bent to form the stop and the hook, said band portion being independent of the band constituting the clamp and being fixed thereon by any appropriate means.

Abstract: Clamp for joining two metal pipes, particularly of the type constituting the exhaust system of a vehicle engine, the ends in facing relationship of the two tubes to be joined having conical shape complementary bearing surfaces which project with respect to the cylindrical outer surface of the pipes. The clamp is constituted by an open ring of inverted V-shaped cross-section, the two ends of which ring comprise bearing elements for means provided for tightening and holding the ring in its closed position when the clamp has been placed over the pipes to be joined.

Abstract: The invention relates to a clamp constituted by a band of metal comprising, at each one of its ends, complementary tightening and/or fastening means, whereas the inner end of the band comprises an extension which goes beyond the corresponding fastening means, under the outer end of the band.In this clamp, the transversal edge of the band, which constitutes the free end of the extension, has a profile indented into the band, such as an .OMEGA.-shaped profile, whereas close to its outer end, and on this side of the corresponding tightening and/or fastening means, said band comprises an elongated boss, which projects from its inner face, and is adapted to penetrate into the indented profile of the free end of the extension, said boss having its maximum height substantially equal to the thickness of the band.