GB2163496A - A seal - Google Patents
A seal Download PDFInfo
- Publication number
- GB2163496A GB2163496A GB08421302A GB8421302A GB2163496A GB 2163496 A GB2163496 A GB 2163496A GB 08421302 A GB08421302 A GB 08421302A GB 8421302 A GB8421302 A GB 8421302A GB 2163496 A GB2163496 A GB 2163496A
- Authority
- GB
- United Kingdom
- Prior art keywords
- seal
- sealing ring
- outer ring
- ring
- screw
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 65
- 239000013536 elastomeric material Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 2
- 239000004952 Polyamide Substances 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 238000002203 pretreatment Methods 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000000007 visual effect 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
- F16B43/001—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts for sealing or insulation
-
- 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
- F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
- F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
- F16J15/127—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement the reinforcement being a compression stopper
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
There is proposed a seal provided with an elastic sealing ring (2) which can be placed on the shank of a screw (5) and has a seal part (19) that is directed towards the head (6) of the screw as well as a seal part (20) that is directed away from the head (6). The elastic sealing ring (2), by its outer circumferential surface (17), is fastened to an inner surface (13) of an outer ring (3) which embraces the sealing ring. The hardness or compressive strength of the outer ring (3) is considerably greater than that of the sealing ring (2). The outer ring (3) has frontally opposite stop faces (11, 12) which are respectively surmounted by the two seal parts (19, 20) of the unloaded sealing ring (2). <IMAGE>
Description
SPECIFICATION
A seal
The invention relates to a seal having the features given in the introductory part of Claim 1.
Known seals of this kind, which are placed on the shank of a screw, have in most cases to be aligned or centred before the screw is finally tightened, thus causing the assembly to be elaborate. For screwing the screw down, it is necessary or recommendabie to use a torque spanner, since it is impossible to bring about a satisfactory permanent sealing function otherwise. For, if the screw is not tightened sufficiently during the assembly there may occur a leakage, which renders necessary at least a retightening of the screw. If, by contrast, the screw is over-tightened during the assembly the sealing ring is over-stressed and pressed towards the outside. In order to obviate these disadvantages, there are often used special screw heads provided with an annular receiving groove, in which the sealing ring is mounted and supported in a centred manner.The use of the known sealing rings thus necessitates the observance of additional measures, which are not inconsiderable, or the employment of special screws. It is another disadvantage that once a screw has been screwed down a subsequent visual check whether a sealing ring has been inserted into the receiving groove in the screw head is impossible.
It is the object of the invention to develop a seal having the features given in the introductory part of Claim 1 to the effect that, while dispensing with special screws and fastening measures, there is brought about with simple means an uncomplicated, easy and absolutely reliable seal assembly with optionally different, preferably industrial screws without using special tools.
According to the invention, this problem is solved by the characterising features of Claim 1.
Preferred further designs and developments as well as further advantages and essential details of the invention emerge from the features of the Sub-Claims, the following description and the drawing, which illustrates preferred constructional forms as examples in diagrammatical representations. In the drawing:
FIGURE 1 shows a top view of a seal according to the invention, and
FIGURE 2 shows a sectioned side view of the seal according to the section ll-li of Fig. 1 with a lower part which is indicated in broken lines and into which there has been introduced a screw, which passes through the seal and is also shown in broken lines.
The seal 1 shown in the drawing comprises an inner sealing ring 2 which is enclosed by an outer ring 3. The seal 1 has been placed on the shank 4 of a screw 5 which has a head 6. Opposite to the head 6 there is a lower part 7, into whose hole 8 the shank 4 of the screw 5 has been inserted. The shank 4 can engage, with a threaded end not shown herein, in a corresponding thread of the lower part 7. It is however also possible to interlock the screw, with a threaded nut not shown herein, with the lower part 7 in the axial direction. In the representation shown in Fig. 2, the screw 5 has been interlocked with the lower part 7 to such an extent that the distance between the sealing surface 9 of the head 6 and the surface 10 of the lower part 7 is equal to the width of the sealing ring 2 in the axial direction. Thus the sealing ring 2 is here in an unloaded condition.If the screw 5 is interlocked by further tightening axially in the direction of the lower part 7, then the distance between the sealing surface 9 and the surface 10 is reduced, causing the sealing ring 2 to be compressed.
The outer ring 3 has an upper stop face 11, which is directed towards the sealing surface 9, and opposite thereto a parallel stop face 12 which is directed towards the surface 10.
The outer ring 3 furthermore has a circular inner surface 13 and a likewise circular outer surface 14. In the exemplified embodiment shown, the stop faces 11, 12 and the inner surface 13 as well as the outer surface 14 are constructed so as to be of identical length and rightangled so that the outer ring 3 has a square cross-section.
The diameter of the outer ring 3 has been dimensioned to be such that its outer surface 14 is in the same plane as the outer circumferential side 15 of the head 6 of the screw 5. The outer ring 3 may preferably be made of a metallic material, for example steel, preferably high-quality stainless steel. It may however be expedient to make the outer ring 3 of a non-ferrous metal, for example aluminium or brass. Over and above this, it may be expedient for a particularly low-cost production to produce the outer ring 3 from a firm plastics material, for example polyamide or the like, which may be reinforced with glass fibres or enriched with other fillers, for example silica sand.It is important that the outer ring 3 should have a relatively high compressive strength so that, as the screw 5 is screwed down , a satisfactory distance from the lower part 7 is ensured in that the sealing surface 9 bears against the stop face 11 and the surface 10 bears against the stop face 12 of the outer ring 3, so that the sealing ring 2 cannot be compressed further in order to prevent any over-stressing thereof.
The sealing ring 2 is constructed so as to be elastic and preferably consists of a rubberlike elastomeric material. The hardness of the elastomeric material of which the sealing ring 2 is made is preferably approximately 40 to 90 Shore A. For fulfilling the sealing function between the screw 5 and the lower part 7, the sealing ring 2 is thus considerably softer than the outer ring 3 which has a substantially greater hardness or compressive strength so as to withstand higher tightening torques of the screw 5 for keeping a satisfactory distance between the sealing surface 9 and the surface 10.
The elastomeric sealing ring 2 has a circularring-shaped inner wall part 16 and a likewise circular-ringshaped outer circumferential surface 17. In the zone of the inner wall part 16, the diameter of the sealing ring 2 has been dimensioned to be such that the inner wall part 16 closely embraces the circumferential surface 18 of the shank 4. The seal 1 is consequently mounted in a captive manner on the shank 4 of the screw 5 by way of selfretention. At the same time, a satisfactory self-centring of the seal 1 is by this means always provided so that no additional manipulations have to be carried out by the operator during the assembly for aligning or centring the seal 1. The diameter of the outer circumferential surface 17 of the sealing ring 2 has been dimensioned to be such that it is substantially equal to the diameter of the inner surface 13 zone of the outer ring 3.According to the invention, the sealing ring 2 is fixedly connected to the outer ring 3. This fastening or attachment of the sealing ring 2 to the outer ring 3 may advantageously be formed or improved by a mechanical or chemical pretreatment of the materials. For this purpose, it may be favourable to rough up or roughen mechanically or to loosen by chemical treatment, for example by solvents, so as to improve adhesion or to roughen by way of acid treatment, for example, the surface of the inner surface 13 of the outer ring 3 and/or the outer circumferential surface 17 of the sealing ring 2. It may also be favourable to join together the inner wall surface 13 and the outer circumferential surface 17 by means of an additional, preferably low-viscosity adhesive.For high-quality applications, there may be used for this purpose, for example, an epoxy resin adhesive with a continuous temperature stability exceeding 1500 Celsius.
The sealing ring 2, which in the installed state is radially absolutely reliably supported by the circumferential surface 18 of the shank 4 inside and by the inner surface 13 of the outer ring 3 outside, frontally has opposite seal parts 19, 20 which, in cross-section, are shaped approximately triangularly and each have two oblique surfaces 21, 22 which are preferably arranged at an angle of approximately 90" to each other. The angle vertex in the abutting zone of the two oblique surfaces 21, 22 is here constructed as a sealing lip 23 which thus encircles the shank 4 of the screw 5 as a circular line at a distance and sealingly bears against the sealing surface 9 of the head 6 and, on the opposite side, against the surface 10 of the lower part 7.
The oblique surface 21 sloping outwardly from the sealing lip 23 is so aligned that it adjoins the corner part 24 formed by the stop surface 11 and the stop surface 12 respectively and by the inner surface 13 of the outer ring 3. The oblique surface 22 sloping inwardly from the sealing lip 23 has been constructed so as to be somewhat longer than the outer oblique surface 22 so that here the inner wall part 16 of the sealing ring 2 is in the axial direction somewhat shorter than the outer circumferential surface 17 thereof.
It is furthermore apparent from Fig. 2 that, in the exemplified embodiment under discussion, the thickness of the sealing 2 between the inner wall part 16 and the outer circumferential surface 17 is approximately equal to or somewhat greater than the thickness of the outer ring 3 between the inner surface 13 and the outer surface 14 thereof. In the zone of the circular-line-shaped sealing lip 23, the diameter of the sealing ring 2 has been designed to be such that it is larger by approximately half the thickness of the sealing ring 2 between the inner wall part 16 and the outer circumferential surface 17 thereof than the diameter in the zone of the inner wall part 16.
Due to the special sealing lip geometry and the development of the seal 1 according to the invention, the seal is held on the shank 4 of the screw 5, beneath the head 6, in a selfcentring manner. The seal 1 according to the invention may preferably be used both in vacuum and pressure systems since the screw 5 can be firmly tightened with considerable force, the flux of force being absorbed via the outer ring 3 between the head 6 and the lower part 7. Any re-tightening of the screw 5 is therefore not necessary. For a low-cost mass production the seal 1 can, on account of its design, be placed fully automatically on the screw 5 through appropriate feeding devices.
There may be largely used industrial screws, and no additional sealing surface machining, for example for providing a receiving groove or the like, is necessary. In the assembled state, it is readily possible to detect from the outside whether the seal 1 was indeed inserted between the head 6 and the lower part 7 and has not been forgotten. It is another advantage that, due to its development according to the invention, the seal 1 acts, with the screw 5 tightened, largely as a screw lock, too, since the transverse forces acting from the sealing ring 3 on the shank 4 cause the screw 5 to be fixedly held in its position during vibrational stresses and the like. The screw lock is supported by the respective frictional contact between the stop face 11 and the sealing surface 9 as well as between the stop face 12 and the surface 10. The seal according to the invention is thus particularly distinguished in that, due to the geometry of the sealing lip according to the invention, selfcentring is brought about. Furthermore, no countersinking, in other words no depression, is necessary for receiving the seal, and there is the advantage that the installed seal is visible from the outside. Finally, a substantial advantage is to be seen in the fact that, when the screw is removed, the seal remains beneath the screw head and thus cannot be lost.
Claims (16)
1. A seal provided with an elastic sealing ring which can be placed on the shank of a screw and has a seal part that is directed towards the head of the screw as well as a seal part that is directed away from the head, characterised in that the elastic sealing ring (2), with its outer circumferential surface (17), is attached to an inner surface (13) of an outer ring (3), whose hardness (compressive strength) considerably exceeds that of the sealing ring (2), and in that the two seal parts (19, 20) of the unloaded sealing ring (2) frontally project from opposite stop faces (11, 12) of the outer ring (3).
2. A seal as claimed in Claim 1, characterised in that the attachment of the sealing ring (2) to the outer ring (3) is formed by a mechanical or chemical pre-treatment, such as surface roughing-up or loosening, of the outer circumferential surface (17) of the sealing ring (2) and/or the inner surface (13) of the outer ring (3).
3. A seal as claimed in one of Claims 1 and 2, characterised in that the sealing ring (2) attached to the inner surface (13) of the outer ring (3) consists of a rubber-like elastomeric material and has a hardness of approximately 40 to 90 Shore A.
4. A seal as claimed in one of Claims 1 to 3, characterised in that the outer ring (3) connected to the elastomeric sealing ring (2) consists of a metallic material.
5. A seal as claimed in one of Claims 1 to 4, characterised in that the outer ring (3) connected to the elastomeric sealing ring (2) consists of a non-ferrous metal, such as aluminium.
6. A seal as claimed in one of Claims 1 to 4, characterised in that the outer ring (3) connected to the elastomeric sealing ring (2) consists of a non-metallic material, more especially plastics material (for example polyamide).
7. A seal as claimed in one of Claims 1 to 6, characterised in that the elastomeric sealing ring (2) fastened to the outer ring (3), with an inner wall part (16), closely encloses the shank (4) of the screw on its circumferential surface (18) and is supported radially inside and outside between the latter and the inner surface (13) of the outer ring (3).
8. A seal as claimed in one of Claims 1 to 7, characterised in that the seal parts (19, 20) of the sealing ring (2), which project from the stop faces (11, 12) of the outer ring (3), have a circular-line-shaped sealing lip (23) in the abutting zone of two oblique surfaces (21, 22) forming an angle and are approximately triangular in cross-section.
9. A seal as claimed in Claim 8, characterised in that the two oblique surfaces (21, 22) of the triangular seal part (19, 20) are arranged at an angle of approximately 90" to each other.
10. A seal as claimed in one of Claims 1 to 9, characterised in that the diameter of the sealing ring (2), in the zone of the circular-lineshaped sealing lip (23), is smaller by approximately half the thickness of the sealing ring (2) between the inner wall part (16) thereof and the inner surface (13) of the outer ring (3) than in the zone of the outer circumferential surface (17).
11. A seal as claimed in one of Claims 1 to 10, characterised in that the thickness of the sealing ring (2), between the inner wall part (16) and the outer circumferential surface (17), is approximately equal to the thickness of the outer ring (3) between the inner surface (13) and the outer surface (14) thereof.
12. A seal as claimed in one of Claims 1 to 11, characterised in that the outer ring (3) encircling the sealing ring (2) is rectangular, preferably square, in cross-section.
13. A seal as claimed in one of Claims 1 to 12, characterised in that, in the axial direction, the inner wall part (16) of the sealing ring (2) is shorter than the outer circumferential surface (17).
14. A seal as claimed in one of Claims 1 to 13, characterised in that one oblique surface (21) of the triangular seal part (19, 20) of the sealing ring (2) adjoins the outer ring (3) corner part (24) formed by the stop face (11, 12) and the inner surface (13).
15. A seal as claimed in one of Claims 1 to 14, characterised in that, in the axial direction, the outer surface (14) of the outer ring (3) is arranged in one plane with the outer circumferential side (15) of the head (6) of the screw (5).
16. A seal substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08421302A GB2163496B (en) | 1984-08-22 | 1984-08-22 | A seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08421302A GB2163496B (en) | 1984-08-22 | 1984-08-22 | A seal |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8421302D0 GB8421302D0 (en) | 1984-09-26 |
| GB2163496A true GB2163496A (en) | 1986-02-26 |
| GB2163496B GB2163496B (en) | 1988-01-27 |
Family
ID=10565660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08421302A Expired GB2163496B (en) | 1984-08-22 | 1984-08-22 | A seal |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2163496B (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5076592A (en) * | 1989-07-13 | 1991-12-31 | Fel-Pro Incorporated | Head gasket with sealing rings having multi-stage compressibility |
| GB2247499A (en) * | 1990-08-28 | 1992-03-04 | Latty Int | Seal |
| DE9308747U1 (en) * | 1993-06-11 | 1993-08-12 | Latty International S.A., Orsay | Sealing element |
| DE4222249A1 (en) * | 1992-07-07 | 1994-01-13 | Freudenberg Carl Fa | Sealing unit of at least two radially self enclosing thrust rings - separated by gap contg. flexible sealing ring, has adhesive fixing sealing ring to thrust rings |
| US5413359A (en) * | 1993-08-31 | 1995-05-09 | Latty International S.A. | Gasket |
| DE4440682A1 (en) * | 1994-11-15 | 1996-06-13 | Parker Hannifin Gmbh | Sealing ring for high pressure, direction-adjustable screw connections |
| GB2328724A (en) * | 1997-08-29 | 1999-03-03 | Armstrong World Ind Inc | Compression failure resistant and high sealing gasket |
| GB2328725A (en) * | 1997-08-29 | 1999-03-03 | Armstrong World Ind Inc | High sealing gaskets |
| GB2338270A (en) * | 1998-06-08 | 1999-12-15 | Armstrong World Ind Inc | Edge coated soft gasket |
| US6702296B2 (en) | 2000-07-26 | 2004-03-09 | Interface Solutions, Inc. | Gaskets with selectively positioned seal enhancement zones |
| US6733015B2 (en) | 2000-03-06 | 2004-05-11 | Interface Solutions, Inc. | Gaskets with controlled flange surface adhesion properties |
| FR2878306A1 (en) * | 2004-11-23 | 2006-05-26 | Legris Sa | Sealing unit manufacturing method for e.g. pipe connector, involves cutting out washer of tube comprising portions, where resistance to deformation of one portion is lesser than that of other portion and former portion is inside tube |
| FR2921142A1 (en) * | 2007-09-18 | 2009-03-20 | Clesse Ind Soc Par Actions Sim | Sealing joint for connecting gas e.g. butane, distribution installation, has flexible ring jointly and concentrically mounted with hard ring and provided with sealing lips that axially extend beyond hard ring and on both sides of hard ring |
| GB2494614A (en) * | 2011-08-02 | 2013-03-20 | Vector Int Ltd | Seal ring and joint |
| US8789831B2 (en) | 2009-10-29 | 2014-07-29 | Dana Automotive Systems Group, Llc | Compression limiter with molded insert for gaskets |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB576233A (en) * | 1944-05-03 | 1946-03-25 | George Herbert Dowty | Improvements in sealing washers for joint-making packing |
| GB831874A (en) * | 1957-01-23 | 1960-04-06 | Walker & Co James | Improvements in sealing washers |
| GB836197A (en) * | 1956-07-02 | 1960-06-01 | Dowty Seals Ltd | Improvements in and relating to joint-making assemblies |
| GB973513A (en) * | 1961-05-15 | 1964-10-28 | Prec Rubber Products Corp | Sealing washer |
| GB1056775A (en) * | 1963-10-23 | 1967-01-25 | Parker Hannifin Corp | Gasket |
-
1984
- 1984-08-22 GB GB08421302A patent/GB2163496B/en not_active Expired
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB576233A (en) * | 1944-05-03 | 1946-03-25 | George Herbert Dowty | Improvements in sealing washers for joint-making packing |
| GB836197A (en) * | 1956-07-02 | 1960-06-01 | Dowty Seals Ltd | Improvements in and relating to joint-making assemblies |
| GB831874A (en) * | 1957-01-23 | 1960-04-06 | Walker & Co James | Improvements in sealing washers |
| GB973513A (en) * | 1961-05-15 | 1964-10-28 | Prec Rubber Products Corp | Sealing washer |
| GB1056775A (en) * | 1963-10-23 | 1967-01-25 | Parker Hannifin Corp | Gasket |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5076592A (en) * | 1989-07-13 | 1991-12-31 | Fel-Pro Incorporated | Head gasket with sealing rings having multi-stage compressibility |
| GB2247499A (en) * | 1990-08-28 | 1992-03-04 | Latty Int | Seal |
| GB2247499B (en) * | 1990-08-28 | 1994-01-19 | Latty Int | Seal |
| DE4222249A1 (en) * | 1992-07-07 | 1994-01-13 | Freudenberg Carl Fa | Sealing unit of at least two radially self enclosing thrust rings - separated by gap contg. flexible sealing ring, has adhesive fixing sealing ring to thrust rings |
| DE9308747U1 (en) * | 1993-06-11 | 1993-08-12 | Latty International S.A., Orsay | Sealing element |
| US5413359A (en) * | 1993-08-31 | 1995-05-09 | Latty International S.A. | Gasket |
| DE4440682A1 (en) * | 1994-11-15 | 1996-06-13 | Parker Hannifin Gmbh | Sealing ring for high pressure, direction-adjustable screw connections |
| DE4440682B4 (en) * | 1994-11-15 | 2005-12-29 | Parker Hannifin Gmbh | Sealing system for a high-pressure swivel joint |
| GB2328724B (en) * | 1997-08-29 | 2002-01-09 | Armstrong World Ind Inc | Compression failure resistant and high sealing gasket |
| GB2328724A (en) * | 1997-08-29 | 1999-03-03 | Armstrong World Ind Inc | Compression failure resistant and high sealing gasket |
| GB2328725A (en) * | 1997-08-29 | 1999-03-03 | Armstrong World Ind Inc | High sealing gaskets |
| GB2328725B (en) * | 1997-08-29 | 2002-01-16 | Armstrong World Ind Inc | High sealing gaskets |
| EP0964189A2 (en) * | 1998-06-08 | 1999-12-15 | Armstrong World Industries, Inc. | Edge coated soft gasket |
| EP0964189A3 (en) * | 1998-06-08 | 2000-10-25 | Armstrong World Industries, Inc. | Edge coated soft gasket |
| GB2338270B (en) * | 1998-06-08 | 2002-03-27 | Armstrong World Ind Inc | Edge coated soft gasket |
| GB2338270A (en) * | 1998-06-08 | 1999-12-15 | Armstrong World Ind Inc | Edge coated soft gasket |
| US6733015B2 (en) | 2000-03-06 | 2004-05-11 | Interface Solutions, Inc. | Gaskets with controlled flange surface adhesion properties |
| US6702296B2 (en) | 2000-07-26 | 2004-03-09 | Interface Solutions, Inc. | Gaskets with selectively positioned seal enhancement zones |
| FR2878306A1 (en) * | 2004-11-23 | 2006-05-26 | Legris Sa | Sealing unit manufacturing method for e.g. pipe connector, involves cutting out washer of tube comprising portions, where resistance to deformation of one portion is lesser than that of other portion and former portion is inside tube |
| FR2921142A1 (en) * | 2007-09-18 | 2009-03-20 | Clesse Ind Soc Par Actions Sim | Sealing joint for connecting gas e.g. butane, distribution installation, has flexible ring jointly and concentrically mounted with hard ring and provided with sealing lips that axially extend beyond hard ring and on both sides of hard ring |
| US8789831B2 (en) | 2009-10-29 | 2014-07-29 | Dana Automotive Systems Group, Llc | Compression limiter with molded insert for gaskets |
| GB2494614A (en) * | 2011-08-02 | 2013-03-20 | Vector Int Ltd | Seal ring and joint |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8421302D0 (en) | 1984-09-26 |
| GB2163496B (en) | 1988-01-27 |
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| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |