Commissariat a L'energie Atomique

Garlock France Sas

Commissariat a L'engergie Atomique & Socitet Brachier Et Fils

Societe Cefilac, Joints Fargere

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Christian Rouaud

Raymond De Villepoix

Claude Abbes

Robert Forges

Philippe Caplain

Patrick Le Gallo

Michel Lefrancois

Jean-Marie Gentzbittel

Richard Levoy

Fabienne Le Guyadec

Jean Fages

Andre Gournier

Jean Valla

Fernand Bacchis

Andre Court

Robert Demay

Robert Piednoir

Fernando Martinez

Robert Besson

Michel Tressol

Laurent Mirabel

A sealing joint comprises, compressed between two parts, a stack of flexible strips separated by offset supports (); an envelop () surrounds this structure () and ensures its sealing. Under compression, the strips distort around the supports becoming very stiff for little distortion. Thus, we can rightly be wary of the consequences regarding the relief of strain on the material, notably at high temperatures.

Sealing joint with laminated internal structure for very high temperatures

The seal can be used at high temperature. It is composed of a central flexible graphite core () maintained in its shape by two metal cups () that do not touch. It is all surrounded by a tight sheath () enabling the flexible core () to be maintained in a neutral atmosphere such as a partial vacuum or a neutral gas.

Flexible graphite sealing joint with metal jacket for high temperature

Elastic metal gasket with offset projecting parts

This invention relates to a sealing O-ring of the composite metallic type with a metallic torus-shaped hollow central body (31), and at least one metallic sheet (32) surrounding this metallic body. The central body (31) is composed of a sequence forming a spiral spring with an overlap and laid out along the circumferences of meridian circles of the torus, forming a spiral spring being side by side but not touching each other.

Composite metallic type seal with spiral springs, and manufacturing

Imperviousness system composed of a metallic toric joint (9) compressed between two bearings (27, 28) which together form an acute angle (.alpha.) so as to produce a sliding and polishing of the skin of the joint and reduce the local levellings which would compromise the imperviousness capacity of the joint on each closing operation.

System with imperviousness joint compressed between two non-parallel

A gasket able to ensure static imperviousness between two parts one being fixed with respect to the other and possibly having surface irregularities and forming a joint housing which is not easily accessible. It generally has a flexible strip (2) formed by two elements (2I, 2E) each having one extremity (7I, 7E). The mechanical behavior of the gasket is ensured by a wire core (3), such a helical spring possibly surrounded by an internal casing (4). An external rigid casing formed of two portions (5E, 5I) advantageously completes this gasket while leaving the extremities (7E, 7I) free.

Ultra-flexible gasket with double jacket

Packing box whose seal lining is composed of joints having a circular or approximately circular section and provided with different diameters so that they alternately rest on the rod (9) of the packing box and the housing (2) in which they are pressed. Excellent imperviousness is obtained and the joints may be metallic which makes it possible to use the packing box at high temperatures.

Toric joints having an alternating diameter for use in a packing box

A flexible joint to ensure static imperviousness between one external medium and one internal medium, and dynamic imperviousness between the two portions of the internal medium. The joint includes a central core in the form of a spring surrounded by three casings, the second casing, with the aid of a jacket of overlapping surfaces ensures the dynamic imperviousness between the mobile element and the fixed element. The external casing ensures static imperviousness between the two portions of the fixed element.

Flexible joint with jacket

So as to embody an assembly whose imperviousness is obtained with slight gripping power and may be kept at high pressure and at a high temperature, the invention concerns proposing a gasket or joint which includes an elastic metal core with a circular section and at least one external casing made of a hard metal. The casing comes and takes support on the flanges of the assembly by projecting parts with a triangular section and having an annular surface in contact with the flanges whose width is at the most equal to about 0.05 mm once the gripping power has been applied.

Metal gasket or joint provided with an extremely high unit-area pressure

The device makes it possible to connect tightly first and second parts having a flange and locking or tightening means for the said flanges. The tightening or locking force applied to the locking of tightening means is multiplied in order to increase the compression force applied to a gasket or joint. Each flange has a conical surface of axis D and angle .lambda.. The device has two clips, each of which has a conical surface of axis D and angle .mu., as well as an intermediate member in the form of a ring constituted by several interconnected segments and having an inner surface and an outer surface. Each inner peripheral surface has a conical surface of axis D and angle .lambda. able to cooperate with the conical surface of axis D and angle .lambda. of the first and second parts. Each outer peripheral surface has a conical surface of axis D and angle .mu. able to cooperate with the conical surfaces of angle .mu. of the clips.

Tight connection device

A device for the tight connection of a first part to a second part in a direction D. It comprises a first member having a first conical surface of axis D and angle .lambda., a second member having a second conical surface of axis D and angle .mu. and a third member having a third planar surface perpendicular to axis D at least one intermediate member, at least one of the three members being connected to the first or second part. The device also has means for bringing together the first and second members.

Remotely disassemblable connection device

This invention relates to a tight connection device comprising a flexible metal joint. The joint, located in two trapezoidal grooves formed in two flanges, has in the rest condition an oval section, whereof one of the axes of symmetry is located in the plane of symmetry of the joints. The joint is in tight contact with the sides of the groove in four zones and, after securing the tie rods, is in contact with the bottom of the grooves in two zones.

The invention relates to a flexible metal joint in which two envelopes surrounding a metal core. The joint has, along its periphery which does not have an opening, at least two bosses, at which the envelope is not in contact with the joint core. A relative displacement between the flanges of the assembly between which the joint is secured consequently has no effect on the efficiency thereof.

Flexible metallic joint

A flexible metal sealing joint comprising an elastic metal core which, in the rest position, is shaped like a torus, as well as at least one outer envelope made from a ductile material. Within its thickness, the outer envelope has two substantially planar bearing surfaces and at least one projecting portion with a substantially triangular cross-section formed on each of the bearing surfaces. The dimensions of the projecting portions are such that said portions are expendable, i.e. they disappear at the end of fixing.

Flexible metal sealing joint incorporating expendable projecting portions

The invention relates to a device for the tight joining of two parts comprising tightening means of the screw-nut type compressing a gasket between the two parts. A compression part and an elastic O-ring constituted by an internal spring with contiguous turns, which is closed on itself and fitted into at least one envelope are placed between the tightening means and one of the parts in order to permit the tightening of the assembly by an auxiliary system, followed by the tensioning of the tightening means by elastic restoration of the ring after fitting tightening means and slackening or releasing the auxiliary system. Application to the joining of two pipes and to the sealing of a container by means of a plug.

Growing community of inventors

Bourg Saint Andeol, France

Christian Rouaud