EP4278115A1 - Dichtring, dichtungsanordnung und verwendung des dichtrings - Google Patents
Dichtring, dichtungsanordnung und verwendung des dichtringsInfo
- Publication number
- EP4278115A1 EP4278115A1 EP21844267.1A EP21844267A EP4278115A1 EP 4278115 A1 EP4278115 A1 EP 4278115A1 EP 21844267 A EP21844267 A EP 21844267A EP 4278115 A1 EP4278115 A1 EP 4278115A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sealing
- sealing ring
- permeation
- permeation barrier
- sealing element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 143
- 230000004888 barrier function Effects 0.000 claims abstract description 69
- 230000001681 protective effect Effects 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 9
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 7
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 claims description 6
- 239000004715 ethylene vinyl alcohol Substances 0.000 claims description 6
- 239000003566 sealing material Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 239000012815 thermoplastic material Substances 0.000 claims description 3
- 229920001169 thermoplastic Polymers 0.000 abstract 1
- 239000004416 thermosoftening plastic Substances 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 8
- -1 chlorobutyl Chemical group 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000011324 bead Substances 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229920005556 chlorobutyl Polymers 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/021—Sealings between relatively-stationary surfaces with elastic packing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/021—Sealings between relatively-stationary surfaces with elastic packing
- F16J15/022—Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/064—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces the packing combining the sealing function with other functions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/102—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
- F16J15/3236—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings
Definitions
- Sealing ring Sealing ring, sealing arrangement and use of the sealing ring
- the invention relates to a seal and its use.
- Sealing rings are generally known and are used, for example, to seal off gaseous media.
- the sealing can be static or dynamic.
- the gaseous medium to be sealed can be pressurized.
- O-rings or X-rings have been used to seal off gaseous media, which during their intended use are arranged in a sealing manner under elastic prestress in an installation space of a sealing arrangement.
- the aforementioned sealing rings seal automatically when the elastic preload is greater than the pressure to be sealed.
- the previously known sealing rings consist, for example, of an ethylene-propylene-diene rubber (EPDM) or of chlorobutyl (Cl I R).
- EPDM ethylene-propylene-diene rubber
- Cl I R chlorobutyl
- a seal of low-molecular media by sealing rings made of the aforementioned materials is unsatisfactory because the mentioned materials have a comparatively large permeation coefficient.
- the permeation coefficient indicates the permeability, here of a medium to be sealed through the seal.
- the invention is based on the object of further developing a seal in such a way that it can also reliably seal low-molecular media over a long period of use and is therefore also well suited for such a use.
- a seal comprising at least one sealing element with a first permeation coefficient and at least one permeation barrier made of a thermoplastic material with a second permeation coefficient, the sealing element and the permeation barrier forming a unit during the intended use of the sealing ring and the first permeation coefficient is greater than the second permeation coefficient.
- the sealing ring according to the invention also reliably seals low-molecular media over a long period of use, for example gaseous media.
- the second permeation coefficient of the permeation barrier is considerably lower than the first permeation coefficient of the sealing element.
- the ratio of the first permeation coefficient to the second permeation coefficient is preferably at least 100, more preferably from 1000 to 10000 or higher.
- the good sealing effect of the sealing ring according to the invention is therefore based primarily on the permeation barrier.
- the sealing element and the permeation barrier are each designed in the best possible way to solve their respective tasks. This independent design of the sealing element and permeation barrier for their respective tasks has the advantage that compromises with regard to the functional properties of the sealing element and/or permeation barrier are not necessary.
- the permeation barrier ensures good sealing results for the sealing ring over a long period of use; the sealing element can compensate well for manufacturing tolerances and/or micro-roughness of sealing surfaces of machine elements of a sealing arrangement to be sealed.
- the permeation barrier largely prevents permeation of the medium to be sealed through the sealing element; Leaks are negligible if they occur at all.
- a sealing arrangement that includes the seal described above can have significantly longer maintenance intervals than a sealing arrangement in which conventional O-rings or X-rings are installed as 1-component rings.
- the sealing element is essentially completely covered by the permeation barrier at least on the side of the unit that faces a medium to be sealed.
- the permeation barrier can be in direct contact with the sealing element or be assigned to it indirectly, for example by a connecting support body.
- a sealing ring with a permeation barrier in the sense described above has a lower overall permeation than a single elastomer element.
- the maintenance interval of a system can be extended as a result.
- the sealing element preferably consists of a rubber-elastic sealing material.
- the advantage here is that elastomeric sealing materials are often available inexpensively in many different specifications and that manufacturing tolerances of the sealing ring and/or the installation space and/or surface roughness of sealing surfaces that limit the installation space can be easily compensated for by the elastomeric sealing material.
- the sealing element is arranged under elastic pretension in the installation space.
- the permeation barrier can consist of a thermoplastic material, particularly preferably an EVOH material.
- EVOH is an ethylene vinyl alcohol copolymer.
- Barrier layers made of EVOH are already known. For heating applications and drinking water installations, plastic pipes can be provided with EVOH barrier layers to prevent oxygen permeation.
- EVOH barrier layers in the form of composite films are used in food packaging.
- the permeation barrier is provided in order to prevent a medium to be sealed from permeating through the sealing element of the sealing ring according to the invention.
- the sealing ring has consistently good performance characteristics over a long period of use. Maintenance intervals of systems with sealing arrangements in which a such a sealing ring is used can be considerably lengthened as a result. As a result, simple and economical operation of the sealing arrangement is possible.
- the permeation barrier can be connected to a support body.
- the support body indirectly connects the permeation barrier to the sealing element.
- the permeation barrier can be integrated into the support body.
- the permeation barrier is permanently connected to the support body.
- the supporting body can consist of a plastic.
- Polyethylene for example, can be used as the material.
- this material has the advantage that the connection to the permeation barrier and the sealing element is particularly tight and durable.
- Another advantage is that polyethylene is available at low cost and has good impermeability to low-molecular fluids.
- polyethylene can be cross-linked by radiation and therefore only has a low setting behavior.
- the supporting body can be designed as a molded part.
- a molded part can be in the form of an injection molded part, an extrudate or a turned part.
- a molded part can also be designed as a cut hose ring or pipe ring. Molded parts have low manufacturing tolerances, give the sealing ring high dimensional stability and prevent gap extrusion. In addition, large quantities can be manufactured with low part costs.
- the molded part can have other functions, such as an assembly aid for better positioning/centering of the sealing ring in its installed form.
- the permeation barrier is designed as a film and is combined with the sealing element to form a composite. The advantage here is that such a composite can be produced easily and inexpensively, in particular with little use of material.
- the network is very compact.
- the sealing element, the permeation barrier and the supporting body can be connected in a non-positive and/or positive manner to form a preassembled unit.
- the assembly/disassembly of such a preassembled unit in/from the installation space of a sealing arrangement is process-reliable and easily possible.
- the risk of assembly errors is limited to a minimum by the pre-assembled unit.
- the invention also relates to a sealing arrangement, comprising the sealing ring described above and two machine elements to be sealed against one another, the first machine element being assigned to the second machine element at a distance adjacent to one another, the sealing ring being arranged in the gap formed by the distance and the permeation barrier covering the surfaces of the machine elements to be sealed touched sealingly.
- the medium to be sealed is prevented by the permeation barrier from escaping through the sealing element into the surroundings of the sealing arrangement.
- the invention further relates to the use of a sealing ring as described above.
- such a sealing ring is used as a hybrid inert gas seal.
- the permeation barrier is necessary in particular for reliable sealing of a protective gas during a long service life of the sealing ring in order to prevent leakage as far as possible.
- the permeation barrier lengthens this period of time considerably, since the medium to be sealed would first have to penetrate the permeation barrier before permeating through the sealing element.
- this period can cover the entire product life cycle.
- sealing ring were formed exclusively by a sealing element made of just one elastomeric sealing material, such as an O-ring or X-ring, low-molecular gas, for example, would penetrate the sealing material within a relatively short time and escape undesirably into the environment.
- elastomeric sealing material such as an O-ring or X-ring
- FIGS. 1 to 8 Eight exemplary embodiments of the sealing ring according to the invention are shown below with reference to FIGS. 1 to 8 and described in more detail.
- Figures 1 to 8 each show a schematic representation:
- FIG. 1 shows a first exemplary embodiment with two permeation barriers arranged in a functional series connection, between which a sealing element is arranged in the radial direction,
- FIG. 2 shows a second exemplary embodiment, in which a sealing element extends in the radial direction on both sides of the end face, with a permeation barrier extending in the axial direction from one sealing element to the other
- FIG. 3 shows a third exemplary embodiment with a U-ring-shaped sealing element
- FIG. 4 shows a fourth exemplary embodiment in which two permeation barriers are used, between which a sealing element is arranged in the radial direction,
- FIG. 5 shows a fifth exemplary embodiment, in which a sealing element which extends in the radial direction is arranged on each end face,
- FIG. 6 shows a sixth exemplary embodiment, similar to the exemplary embodiment from FIG. 3, a sealing element being used which is connected to a permeation barrier on the inner circumference,
- FIG. 7 shows a seventh exemplary embodiment, in which two sealing elements are arranged adjacent to one another at a radial distance, with a permeation barrier being arranged in the gap formed by the distance,
- FIG. 8 shows an eighth exemplary embodiment, similar to the exemplary embodiment from FIG. 8, a sealing element, viewed in cross section, having a rectangular design and being surrounded by a U-shaped permeation barrier on its side facing the medium to be sealed.
- the sealing rings provide a static seal. It is each to hybrid inert gas seals 20. Radially inside the sealing ring is the medium to be sealed 4, which is to be sealed in a space 21 of a sealing assembly 22 with a relative Overpressure is arranged. Atmospheric pressure from the environment 23 is applied to the seal radially on the outer circumference.
- the seal holds back the medium 4 to be sealed, in particular through the permeation barrier 2 in the space 21 to be sealed, and prevents the medium 4 to be sealed from permeating through the sealing ring into the environment 23.
- the sealing ring forms part of the sealing arrangement 22.
- the sealing ring is used as an inert gas seal 20 in all the exemplary embodiments shown.
- the sealing ring is arranged between the two machine elements 15, 16, which are designed as an upper 24 and lower flange 25, and seals them from one another.
- the machine elements 15, 16 delimit a gap 17 and have the surfaces 18, 19 to be sealed.
- FIG. 1 A first exemplary embodiment of the sealing ring according to the invention is shown in FIG.
- the sealing element 1 is indirectly connected to the permeation barrier 2 by the supporting body 9 , which consists of a plastic 10 .
- the permeation barrier 2 is formed by two rings which are arranged concentrically to one another and which are associated with one another at a radial distance, the radial distance being completely filled with the plastic 10 of the support body 9 .
- FIG 2 a second embodiment is shown in which the support body 9, also like the support body 9 in Figure 1, is designed as a molded part 11 and the permeation barrier 2, which is formed in Figure 2 by only one ring, essentially completely encloses.
- a sealing element 1 extends in the radial direction on both sides of the sealing ring, the sealing elements 1 being so thin and flexible that they only settle into the micro-roughness of the surfaces 18, 19 to be sealed, so that the permeation barrier 2 covers the surfaces 18, 19 to be sealed of the machine elements 15, 16 to be sealed and touched in a sealing manner.
- the sealing elements 1 are only micrometers thick and disappear after the installation of the sealing arrangement in the micro-roughness of the surfaces 18, 19 to be sealed; the permeation barrier 2 then touches the surfaces 18, 19 to be sealed again and seals them.
- FIG. 3 A third exemplary embodiment is shown in FIG. 3, in which the support body 9 is designed as a molded part 11 and, as in FIG. 2, is arranged around the permeation barrier 2 .
- the actual sealing element 1 is arranged radially on the outside of the support body 9 and, in the exemplary embodiment shown, ensures good tolerance compensation in the axial direction.
- FIG. 4 shows a fourth exemplary embodiment of a sealing ring, which has a particularly simple structure with few parts.
- the sealing ring comprises only the sealing element 1 which is sandwiched between two permeation barriers 2 .
- the permeation barriers 2 are arranged concentrically and adjacent to one another at a radial distance, the sealing element 1 being arranged in the gap formed by the distance.
- the sealing element 1 On the front side, the sealing element 1 has two sealing beads 26 extending in a circular ring shape in the circumferential direction, and on the front side only one sealing bead 27.
- the sealing beads 26, 27 influence the contact pressure, the compression and the mold filling and can vary in number and Shape are adapted to the particular circumstances of the application, in particular to pressure and temperature.
- FIG. 1 A further exemplary embodiment of a sealing ring is shown in FIG.
- the permeation barrier 2 is designed as a one-piece molded part and, as can be seen in the section shown, is essentially in the shape of a double T.
- a sealing element 1 is arranged on the front side on both sides, the sealing elements 1 being symmetrical to an imaginary radial plane that extends centrally through the permeation barrier 2 in the axial direction.
- FIG. 6 A sixth exemplary embodiment is shown in FIG. 6, the permeation barrier 2 being arranged radially on the inside of the sealing element 1 .
- the sealing element is so thin and flexible on the face side on both sides of the permeation barrier 2 that it only settles in the micro-roughness of the surfaces 18, 19 to be sealed, so that the permeation barrier 2 covers the surfaces 18, 19 of the machine elements 15, 16 fitting and sealingly touched.
- the sealing element 1 is only micrometers thick on the front side on both sides of the permeation barrier 2 and, after the installation of the sealing arrangement, has practically completely disappeared in these areas in the micro-roughness of the surfaces 18, 19 to be sealed; the permeation barrier 2 then touches the surfaces 18, 19 to be sealed again and seals them.
- the sealing elements 1, the permeation barriers 2 and/or the support bodies 9 can be connected by means of a positive and/or non-positive connection and/or material connection.
- the sealing element 1 and the permeation barrier 2 can thereby form the unit 3 .
- the sealing element 1, the permeation barrier 2 and the support body 9 can preassembled unit 14 form. This simplifies the handling of the sealing ring, in particular during its assembly.
- a form-fitting connection can be achieved, for example, in that the parts to be connected to one another have openings through which the material of the other part in each case penetrates. This results in a particularly durable clawing of the parts together.
- FIG. 13 A seventh exemplary embodiment of the sealing ring according to the invention is shown in FIG.
- the composite 13 comprises at least one of the parts of the sealing element 1 and the permeation barrier 2 in the form of the film 12.
- the permeation barrier 2 has particularly compact dimensions, so that the sealing ring also has compact dimensions overall.
- the composite 13 extends not only essentially in the axial direction of the sealing ring.
- the composite 13 extends to the two end faces and, in the section shown here, is essentially stepped. This has the advantage that, in contrast to the exemplary embodiment from FIG. 2, the end faces of the sealing ring are also sealed off by the permeation barrier 2 .
- FIG. 1 An eighth exemplary embodiment is shown in FIG.
- the sealing element 1 is surrounded by the film 12 in a U-shape on the side 5 facing the medium 4 to be sealed.
- the film 12 extends along the end faces and the radially inner boundary of the sealing element 1 .
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021100428.4A DE102021100428A1 (de) | 2021-01-12 | 2021-01-12 | Dichtring, Dichtungsanordnung und Verwendung des Dichtrings |
| PCT/EP2021/087089 WO2022152527A1 (de) | 2021-01-12 | 2021-12-21 | Dichtring, dichtungsanordnung und verwendung des dichtrings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4278115A1 true EP4278115A1 (de) | 2023-11-22 |
Family
ID=79686896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21844267.1A Withdrawn EP4278115A1 (de) | 2021-01-12 | 2021-12-21 | Dichtring, dichtungsanordnung und verwendung des dichtrings |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20240068571A1 (de) |
| EP (1) | EP4278115A1 (de) |
| DE (1) | DE102021100428A1 (de) |
| WO (1) | WO2022152527A1 (de) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5551707A (en) * | 1995-06-06 | 1996-09-03 | Freudenberg-Nok General Partnership | Multi-material seal ring |
| US6443502B1 (en) * | 1999-04-22 | 2002-09-03 | Denso Corporation | Leakage restriction device for refrigeration cycle |
| JP2005282820A (ja) * | 2004-03-30 | 2005-10-13 | Tokai Rubber Ind Ltd | 低透過性弾性シールリング |
| US20070045967A1 (en) | 2005-08-31 | 2007-03-01 | Freudenberg-Nok General Partnership | Assemblies sealed with multilayer composite torsion seals having a layer of dispersed fluoroelastomer in thermoplastic |
| BRPI0816969A2 (pt) * | 2007-09-13 | 2015-03-24 | Cameron Int Corp | Vedador de múltiplos elastômeros |
| AU2012304184B2 (en) | 2011-09-01 | 2014-07-24 | 2266170 Ontario Inc. | Multilayered material and containers and method of making same |
| DE102015107833A1 (de) | 2015-05-19 | 2016-11-24 | Von Ardenne Gmbh | Vakuumanordnung und Dichtstruktur |
| US9863536B2 (en) * | 2015-12-30 | 2018-01-09 | Onesubsea Ip Uk Limited | Multi-material seal having a seal body and core |
| US10180188B2 (en) * | 2016-02-10 | 2019-01-15 | Onesubsea Ip Uk Limited | Multi-material seal with lip portions |
-
2021
- 2021-01-12 DE DE102021100428.4A patent/DE102021100428A1/de not_active Ceased
- 2021-12-21 EP EP21844267.1A patent/EP4278115A1/de not_active Withdrawn
- 2021-12-21 WO PCT/EP2021/087089 patent/WO2022152527A1/de not_active Ceased
- 2021-12-21 US US18/260,790 patent/US20240068571A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| US20240068571A1 (en) | 2024-02-29 |
| WO2022152527A1 (de) | 2022-07-21 |
| DE102021100428A1 (de) | 2022-07-14 |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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