Abstract: An annular gasket intended to provide a tight assembly between a first and second pipe after crimping, including an axis of revolution, whereof a section parallel to said axis is a curve formed by a series of an odd number of circle segments Ci connected by apices Si forming a regular polygon, i varying from 1 to 2*n+1, n being a positive integer greater than or equal to 1, the apex Si being the center of the circle passing through the apices Si+n and Si+n+1 modulo 2*n+1. Such a curve is said to have a constant width. The apices Si advantageously form a polygon.

Abstract: An annular gasket intended to provide a tight assembly between a first and second pipe after crimping, including an axis of revolution, whereof a section parallel to said axis is a curve formed by a series of an odd number of circle segments Ci connected by apices Si forming a regular polygon, i varying from 1 to 2*n+1, n being a positive integer greater than or equal to 1, the apex Si being the center of the circle passing through the apices Si+n and Si+n+i modulo 2*n+1. Such a curve is said to have a constant width. The apices Si advantageously form a polygon.

Abstract: The invention seeks to provide a gasket for a quick connector that is inexpensive to fabricate, providing sealing over a wide range of fluid pressures, while presenting engagement forces that are small for flow diameters of large size. More precisely, the present invention provides a sealing gasket of elastically deformable material having a Y-shaped longitudinal axial section for use in a quick coupling for a fluid duct, the gasket (10) comprising an I-shaped stem (1) and a V-shaped portion (2), flash (3p, 3s) of join plane (P1) of the gasket being located between the I-shaped stem (1) and the V-shaped portion (2), preferably substantially perpendicularly to the longitudinal axis (P2) of the gasket (10). The invention also provides the use of such a gasket, and a mold and a method for fabricating such a gasket.

Abstract: The invention concerns a support (30) for storing, transporting and using devices (10) for applying a sealing compound onto an element projecting on a surface. The invention is characterised in that it comprises a plurality of said devices borne by a substantially planar base plate (32) and wherefrom the latter can be detached, and each device includes a cap (11) designed to cover entirely said element and containing a predetermined amount of sealing compound in frozen state. The invention is useful for producing impermeability to fluids at rigid connecting elements such as rivets, bolts or the like, for protecting projecting elements of structures against electromagnetic effects such as lightning.

Abstract: The invention seeks to enable a coupling to be made in which assembly forces during assembly of the gasket are small, even though the coupling is of large size, e.g. having a diameter equal to 50 mm. To achieve this object, the invention proposes making a gasket whose envelope in section presents a surface for bearing against the bottom of a groove that is smaller than the surface it presents for bearing against the fluid-feed endpiece. A fluid transfer coupling is for making between a fluid-feed endpiece and a connection tube, the coupling including an annular groove for housing the gasket, the gasket presenting a bearing face for bearing against the bottom of the groove and a bearing face for bearing against the endpiece, the groove presenting an opening and a groove bottom that is substantially flat and smaller in size than the opening.

Abstract: A sound insulation in tubular parts regardless of the section shape of the part, uses a piece of material that is suitable for expanding over the entire section of the section, which piece is mounted using a support suitable for fixing to the wall of the tube that is to be insulated. In a particular embodiment, a sound insulation assembly mounted in a part presenting a longitudinal direction and a tubular wall comprises a wafer that is thermally expandable to form a foam, said wafer having two parallel main faces and extending essentially along a main plane from a first wall portion towards the diametrically opposite wall portion, together with a wafer support comprising a clamp for retaining the wafer prior to expansion and coupled to fixing means in the form of a clip for fixing to the first wall portion of the part.

Abstract: The invention seeks to solve the problem of providing sound insulation in tubular parts regardless of the section shape of the part that is to be insulated, and without using an insert that is of high cost. To this end, the invention proposes using a piece of material that is suitable for expanding over the entire section of the section, which piece is mounted using a support suitable for fixing to the wall of the tube that is to be insulated. In a particular embodiment, a sound insulation assembly mounted in a part presenting a longitudinal direction and a tubular wall comprises a wafer that is thermally expandable to form a foam, said wafer having two parallel main faces and extending essentially along a main plane from a first wall portion towards the diametrically opposite wall portion, together with a wafer support comprising a clamp for retaining the wafer prior to expansion and coupled to fixing means in the form of a clip for fixing to the first wall portion of the part.

Abstract: A bellows for an airplane boarding corridor for passengers, and a corridor including such bellows. A bellows actuator device of the invention has chambers that can be inflated and deflated on command to enable the bellows to be extended and to allow the bellows to be retracted, and it also returns the bellows to the retracted condition. Advantageously, the inflatable chambers of the actuator device of the invention form at least two rows of tubes disposed symmetrically or substantially symmetrically about a longitudinal plane of symmetry of the bellows, each row being individually inflatable. The present invention is mainly applicable to making equipment, in particular weatherproofing bellows, for airport boarding corridors for passengers.

Abstract: A gangway bellows for rolling stock, where the bellows has corrugated regions forming a deformable volume, and comprises a plurality of assembled-together modules, each module being made of a rubber-base material and including at least two corrugated regions that are assembled together by vulcanization.

Abstract: A cover for a container includes a peripheral seal disposed in a peripheral chamber of the cover and radially expansible into sealing engagement with a wall of the container in response to axial or radial compression of the seal by a flexible rod inserted into the peripheral chamber and against the seal.

Abstract: A gangway bellows for rolling stock, where the bellows has corrugated regions forming a deformable volume, and comprises a plurality of assembled-together modules, each module being made of a rubber-base material and including at least two corrugated regions that are assembled together by vulcanization.

Abstract: The invention relates to a fuel tank presenting a tank body having a neck about an axis, the neck being extended by a region of section smaller than that of the neck, a plate, and a nut screwed onto the neck of the tank, an annular housing for a gasket being defined by a top edge of the neck, a bottom edge of the plate, an outer cylindrical plate of the annular region, and an inner cylindrical face of the nut, the gasket having a top edge, a bottom edge, an outer edge, and an inner edge, and the tank being made of plastics material. In section, the gasket has a profile that is elongate parallel to said axis.

Abstract: The present invention relates mainly to a sealing ring and to a method of mounting it in a groove. According to the present invention, the sealing ring is twisted before being mounted in the groove so that the reaction forces retain it therein. The retention capabilities of the present invention is improved for sealing rings of a section that includes a projection directed towards a wall of the groove that provides radial support. The present invention applies more particularly to the mechanical, motor vehicle, and aircraft industries. The sealing ring of the present invention can be used, in particular, in association with the manifolds of turbocompressors, and with air inlet and outlet manifolds, in particular those made of plastics materials, as used in the motor vehicle industry.

Abstract: An inflatable gasket sealing device for a door or a moving panel comprises an inflatable sealing gasket (14) fixed on the periphery of the door or the panel (10) and protected by a cover (30, 32) that includes a slot (36) through which a shoe (24) carried by the gasket passes, which shoe is intended to press against a fixed surface (12) when the gasket is inflated, a longitudinal internal partition (26) of the gasket forming return means for returning the shoe (24) to its rest position. The device is applicable, in particular, to the sliding or swing doors of railway cars.

Abstract: Woodwind or like musical instruments comprise a hollow body (2) pierced by tone holes (3) which are closable by means of respective finger-actuated keys (1). The keys may themselves optionally be pierced by further respective holes or orifices (11). A sealing pad (20) for such a key comprises a fixed annular portion (21) for fixing to the key, and a movable annular lip (23) suitable for being pinched between the fixed annular portion of the pad and the rim (4) of a tone hole when the tone hole is closed by the pad.

Abstract: A composite seal ring intended to be compressed between two surfaces which are to be applied against each other in a sealed manner, wherein the composite seal ring comprises firstly a metal seal ring comprising a core constituted by a spiral spring surrounded by a metal sheath which provides two peripheral lips projecting outwardly substantially in the mid-plane of the said metal seal ring, and secondly by a toroidal elastomer seal which surrounds the said metal seal ring, together with members for connecting the toroidal elastomer seal to the metal seal ring, said members being freely lodged between the projecting lips of the said metal seal ring and being rigidly lodged in a corresponding slot of the said toroidal elastomer seal.

Abstract: A toroidal ring made from a spiral spring with contiguous turns, such as those used for constituting the inner core of a metal sealing ring. The ring has a weld without filling metal connecting together the two end turns of the spring, this weld being such that continuity of the wire of the spring is provided without altering the contiguous configuration of the turns and the mechanical, physical and chemical properties of the spring are substantially unchanged at this weld. The weld can advantageously be effected by a resistance weld performed with a pulse of electric current.

Abstract: The invention concerns a metal seal ring comprising a jacket made of ductile metal intended to be clamped between two surfaces to be applied against each other in a fluid-tight manner and one or two internal spiral springs having close-wound turns made of metal wire, the jacket being provided with a bead in the vicinity of its bearing lines on the surfaces to be applied against each other, the spiral springs are formed with a wire having a cross-section such that it avoids the creeping of the metal of the jacket between the turns in the vicinity of the bearing lines on the surfaces to be applied against each other. Such a seal withstands numerous assembling and dismantling cycles and rises and lowerings of the temperature, without any appreciable loss of its fluid-tight qualities.

Abstract: Seal ring made of an elastomeric material intended to operate at a temperature at least equal to 150.degree. C and to be in contact on its opposite sides with two mediums one of which at least is a medium emitting nuclear radiations and to be able to slide with a very slight friction coefficient in contact with a body which rotates and/or moves in a linear direction, comprising a body with an outer casing made of an elastomer which is resistant to heat and to nuclear radiations and has a low friction coefficient and with an inner casing made of a heat resisting elastomer, the outer and inner casings being closely welded to each other, the body being filled with a low-pressure gas and the inner casing being impermeable to the gas for filling the body. Application to seal rings for vessels in a radioactive medium.

Abstract: Pneumatic seal consisting of a flattened casing forming a base onto which are folded back symmetrically double thickness of two lateral walls. Such a seal has, in the "rest" position, a cross-section having a very slight height and, in the "inflated" position, a cross-section in height greater than that of known seals. Such a seal is intended to provide sealing between mobile elements belonging to sealed enclosures, for example at the level of the doors of those enclosures.