GB2460912A - An annular gasket - Google Patents
An annular gasket Download PDFInfo
- Publication number
- GB2460912A GB2460912A GB0902430A GB0902430A GB2460912A GB 2460912 A GB2460912 A GB 2460912A GB 0902430 A GB0902430 A GB 0902430A GB 0902430 A GB0902430 A GB 0902430A GB 2460912 A GB2460912 A GB 2460912A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gasket
- sealing surface
- ribs
- cross
- sealing
- 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 36
- 239000000463 material Substances 0.000 claims description 9
- 229920003051 synthetic elastomer Polymers 0.000 claims description 4
- 239000005061 synthetic rubber Substances 0.000 claims description 4
- 229920002943 EPDM rubber Polymers 0.000 claims description 2
- 239000010432 diamond Substances 0.000 claims description 2
- 229920003052 natural elastomer Polymers 0.000 claims description 2
- 229920001194 natural rubber Polymers 0.000 claims description 2
- 150000002825 nitriles Chemical class 0.000 claims description 2
- 235000012773 waffles Nutrition 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 description 15
- 238000010168 coupling process Methods 0.000 description 15
- 238000005859 coupling reaction Methods 0.000 description 15
- 150000001875 compounds Chemical class 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F16J15/02—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
- F16J15/106—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure homogeneous
-
- 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
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/06—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends
- F16L19/065—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends the wedging action being effected by means of a ring
- F16L19/0653—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends the wedging action being effected by means of a ring the ring being rotatably connected to one of the connecting parts
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
- F16L21/04—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings in which sealing rings are compressed by axially-movable members
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/08—Joints with sleeve or socket with additional locking means
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
- F16L25/14—Joints for pipes of different diameters or cross-section
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
- F16L55/17—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of rings, bands or sleeves pressed against the outside surface of the pipe or hose
- F16L55/171—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of rings, bands or sleeves pressed against the outside surface of the pipe or hose the ring or the sleeve being tightened by a wedge section
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
An annular gasket has a sealing surface 21. A series of parallel, substantially equally spaced annular ribs 22a, 22b extend annularly across the sealing surface 21. A second series of ribs 23 cross the ribs 22a, 22b to produce a waffle pattern. The ribs define a plurality of square perimeters which seal against a target pipe surface (not shown) and Isolate deep score marks, cracks or crevices from each other thereby preventing the spread of leaks by tracking. As can be seen from the cut edge, the ribs have a substantially arcuate or domed cross section 24. The gasket has a substantially L shaped cross section.
Description
NOVEL GASKET
The present invention relates to a novel gasket design with application in a variety of applications for example but not limited to; the sealing of flange adaptors, pipe couplings or repair clamps in service mains for water gas or other fluid supplies.
Couplings, flange adapters and other mechanical fittings of various designs are known for use in the connection of pipes of same or different materials and diameters, or to connect pipes to flanged products such as valves, bends tees or other such flanged pipe work.
A typical coupling might comprise a centre sleeve with its ends formed to receive an annular gasket which in turn is abutted to an end ring. The gasket is energised by compression provided by.fastener means which generally draw the end ring and sleeve together against the gasket.
In one conventional design, the fastener means comprises a plurality of nut and bolt assemblies axially aligned and spaced around the circumference of the end ring. The nut and bolt assemblies are typically received through lugs designed to receive the assemblies.
Various fastener arrangements are known, for example fasteners may extend over the entire length of a coupling. In other popular arrangements, the bolts may connect between the end ring and a lug extending radially from an end of the sleeve.
In all fastener arrangements, gaskets are included to provide a seal between the outer circumferential surface of the pipe and the end of the sleeve of the coupling.
Gaskets come in a wide range of cross sections and sizes for example but without limitation; a wedge, trapezoid, square, rectangle, round, L shape or U shape cross section. They can be of solid construction, hollowed or reinforced internally or externally with more rigid materials to the material of the main gasket body such as metal or plastic.
Known gaskets typically comprise of an elastomeric or polymeric material having a hardness which is less than that of the predominant material used in the coupling and also is less than the hardness of the material of the target pipe.
Common gaskets are provided from a synthetic rubber having a hardness in the range 50 IRHD to 80 IRHD.
These relatively soft compounds assist sealing on uneven pipe surfaces (for example, cracked or creviced due to corrosion) by flowing into crevices. These soft compounds are less well suited in couplings used to U..
seal a wide range of pipe diameters within the same coupling. In these applications, a softer compound flows easily into any gap between the *..
* pipes and the inner wall of the coupling which has the effect of *.* dramatically reducing the sealing capacity of the gasket. Because of this, harder compounds (typically in the region of 80 IRHD) are used and *:*. employed to resist unwanted extrusion of the gasket between the inner wall of the coupling and the outer circumferential surface of the pipe.
However, whilst the harder compounds obviate the unwanted extrusion problem, they have reduced effectiveness in sealing on heavily corroded (uneven) pipe surfaces. To compensate for this, couplings have been designed to provide for increased gasket loading by means of fasteners. A consequence of this is that additional material is required in the coupling components to resist the larger loads placed on the fasteners.
It is also known to introduce a plurality of small annular ribs around the surface which defines the sealing bore of an annular gasket. This serves to increase gasket pressure on a pipe locally but where pipes had deep score marks, cracks or crevices in multiple positions radially and axially, content from the pipe could escape from one defect and track via the annular grooves between the ribs to another (and another, and so on..). Where one or more of these defects traverse a rib of the gasket, eventually * external leakage of content can result.
With recent improvements in "sniffers" used by the gas industry to detect minor traces of gas leaks (at previously undetected levels of 3Oppm and less), it has come to light that conventional gaskets occasionally do not provide adequate sealing on all defective pipe surfaces.
The present invention seeks to provide a gasket which is suited both to sealing pipe joints between pipes of significantly different outside diameters and to sealing damaged pipes with multiple deep score marks, "I. cracks or crevices in their outer circumferential surface.
* In accordance with the present invention, there is provided an annular gasket having a sealing surface designated for sealing against an uneven pipe surface or pipe joint the sealing surface being provided with a raised pattern of geometric shape perimeters.
The gasket may have any known cross section.
The raised pattern may, for example, comprise one or more of the following shapes; squares, circles, diamonds, rectangle, polygon or other geometric shape which describes an enclosed area. The shapes may be of substantially equal size or a plurality of sizes. The pattern may be random or repeating.
In use the shape perimeters compress against and seal an underlying pipe surface and at least partly invade deep score marks, cracks or crevices. As the perimeters each define an enclosed area and are spaced apart across the pipe surface, the opportunity for leakage to track between shapes and from one end of the gasket to another is considerably reduced compared to ribbed gaskets. Pipe surface defects are contained locally within shape perimeters and prevented from permeating or spreading to other defects.
The raised shape perimeter walls can be minor or substantial in height but desirably they have a height of at least 1.5mm and a width to height ratio of at least 1:1. The raised shape perimeter walls may be of square cross section or buttress, triangular, domed or other shape. Other possible shapes include, without limitation; polygonal and acme thread form.
Optionally, more than one cross section may be used on a given sealing surface, for example but without limitation, in a waffled configuration circumferentially extending walls may take a buttress or acme thread from, whilst axially extending walls are of square, triangular, domed or : other geometrical shape. Various combinations of wall cross section can be envisaged and selected to best suit manufacturing requirements and/or end use.
It will be appreciated that the greater the height of the wall, the greater ** the sealing ability of the seal on damaged pipe surface. S. S * S S * S.
The inventors have found that in demonstrations gaskets in accordance with the invention create a substantially better seal than prior art gaskets used for the same application. A standard prior art gasket was compared with a gasket in accordance with the present invention on knurled and grooved test pipe as specified by the UK gas industry (GIS LC8 part 4).
This surface topography is intended to represent corroded pipe surfaces on iron or steel mains and can also be used to represent typical pipe scoring experienced on plastic pipe.
The prior art gasket experienced substantial leakage at less than 0.1 bar, the novel gasket achieved a leak tight seal at 7 bar.
A further advantage of the novel gasket design is that it permits fabrication of the gasket from harder compounds reducing the occurrence of unwanted extrusion between pipe and coupling whilst providing much improved sealing on defective pipe surfaces compared to prior art gaskets.
Previously filed UK patent application number 0811263.3 from which this application claims priority describes one embodiment of coupling in which a gasket in accordance with the invention can conveniently be used, though the gasket has potential application in a wide range of couplings, clamping devices and adapters.
Preferably the sealing surface of the gasket comprises natural rubber or synthetic rubber. Suitable synthetic rubbers include EPDM or Nitrile in a * *** hardness range of from about 5OIRHD to about 80 IRHD. *S*.
S ****
* Desirably, the sealing surface has a hardness in the range from 7OIRHD to IRHD. *.*. **S.
*:*. The invention will now be described with reference to the following Figures in which: Figure 1 illustrates a ribbed sealing surface of a gasket as known in the
prior art.
Figure 2 illustrates a first embodiment of a gasket in accordance with the present invention.
Figure 3 illustrates a second embodiment of a gasket in accordance with the present invention Figure 4 illustrates a third embodiment of a gasket in accordance with the present invention Figure 1 shows a section of a prior art annular gasket viewed from its sealing side. The gasket is trapezoidal in cross section. As can be seen, the gasket has an inner, annular sealing surface 1 along which are provided a series of parallel, substantially equally spaced ribs 2a, 2b, 2c.
Figure 2 shows a first embodiment of the invention. Again the gasket is annular and is shown in a section viewed from the sealing side. As can be seen, the gasket has an annular sealing surface 21. A series of parallel, substantially equally spaced annular ribs 22a, 22b extend annularly across the sealing surface 21. A second series of ribs 23 cross the ribs 22a 22b S...
: to produce a waffle pattern. The ribs define a plurality of square perimeters which seal against a target pipe surface (not shown) and isolate deep score marks, cracks or crevices from each other thereby preventing the spread of leaks by tracking. As can be seen from the cut edge, the ribs have a substantially arcuate or domed cross section 24. The gasket has a substantially L shaped cross section. * *. * S.
Figure 3 shows an alternative embodiment of the invention. As can be seen, the gasket has an annular sealing surface 31. A series of parallel, substantially equally spaced annular ribs 32a, 32b extend annularly across the sealing surface 31. A second series of ribs 33 cross the ribs 32a, 32b to produce a waffle pattern. The ribs define a plurality of elongate rectangle perimeters which seal against a target pipe surface (not shown) and isolate deep score marks, cracks or crevices from each other thereby preventing the spread of leaks by tracking. As can be seen from the cut edge, the ribs have a substantially trapezoidal or buttress cross section 34. The gasket has a substantially trapezoidal shaped cross section 35.
Figure 4 illustrates the gasket as described in Figure 5 of previously filed UK patent application number 0811263.3 from which this patent application claims priority. The figure shows a section of a gasket 4 in accordance with the invention. As can be seen the annular gasket has a substantially L shaped cross section. Moulded into the sealing surface are a plurality of circumferentially arranged ribs 41a, 41b, 41c and a plurality of axially extending ribs 42 crossing the circumferentially arranged ribs.
The crossed ribs define a plurality of pockets 43 which assist in sealing in leaks on deeply pitted or corroded pipe. An annular recess 44 on the reverse side of the sealing surface receives a gripping or support ring (not shown). The ribs 41a, 41b, 41c can be seen to have a substantially square cross section. * * * ** * *as. * S **. S...
I S...
S 5*5 S. *5 S
S S S S.
Claims (12)
- SCLAIMS1. An annular gasket having a sealing surface designated for sealing against an uneven pipe surface or pipe joint the sealing surface being provided with a raised pattern of geometric shape perimeters.
- 2. A gasket as claimed in claim 1 wherein the raised pattern comprises shapes selected from; squares, circles, diamonds, rectangle, polygon or other geometric shape which describes an enclosed area.
- 3. A gasket as claimed in claim 2 wherein the shapes are of substantially equal size.
- 4. A gasket as claimed in any preceding claim wherein the raised pattern is repeating. S...
- 5. A gasket as claimed in claim 4 wherein the shapes are quadrilateral and form a waffled surface. S...
- 6. A gasket as claimed in any preceding claim wherein the raised shape perimeter walls have a height of at least 1.5mm and a width to height ratio of at least 1:1.
- 7. A gasket as claimed in any preceding claim wherein the raised shape perimeter walls have a cross section selected from; square, buttress, trapezoidal, triangular, domed, polygonal and acme thread form.
- 8. A gasket as claimed in any preceding claim wherein more than one cross section of wall is employed on the sealing surface.
- 9. A gasket as claimed in any of claims 5 to 8 wherein circumferentially extending walls may take a buttress or acme thread from and axially extending walls are of square, triangular, domed or other geometrical shape.
- 10. A gasket as claimed in any preceding claim wherein the sealing surface of the gasket comprises natural or synthetic rubber.
- 11. A gasket as claimed in claim 10 wherein the material of the sealing surface is selected from include EPDM and Nitrile and has a hardness in a hardness in the range of from about 5OIRHD to about IRHD.
- 12. A gasket as claimed in any preceding claim wherein the material of the sealing surface has hardness in the range from 7OIRHD to 80 IRHD. * * * ** S S... * S *5..* *5*I I..S S. IS S. S S * S S S.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0902430A GB2460912B (en) | 2008-06-19 | 2009-02-13 | An annular gasket |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0811263A GB2461071A (en) | 2008-06-19 | 2008-06-19 | Compression pipe coupling tightened by tangential bolt |
GB0902430A GB2460912B (en) | 2008-06-19 | 2009-02-13 | An annular gasket |
Publications (3)
Publication Number | Publication Date |
---|---|
GB0902430D0 GB0902430D0 (en) | 2009-04-01 |
GB2460912A true GB2460912A (en) | 2009-12-23 |
GB2460912B GB2460912B (en) | 2010-12-22 |
Family
ID=42104597
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0902430A Active GB2460912B (en) | 2008-06-19 | 2009-02-13 | An annular gasket |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2460912B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2469858B (en) * | 2009-04-30 | 2013-10-16 | Vip Polymers Ltd | Pipe coupling |
NL2010057C2 (en) * | 2012-12-24 | 2014-06-25 | Fischer Georg Waga Nv | A coupling device for coupling with a tube. |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110579309B (en) * | 2019-10-23 | 2021-05-07 | 诸暨市竟程智能科技有限公司 | Structure for preventing detection substance from being brought out of pressure transmitter |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3150876A (en) * | 1961-11-14 | 1964-09-29 | Wylie M Lafferty | Sealing structure for pipe joints |
US3892417A (en) * | 1973-08-27 | 1975-07-01 | American Funeral Supply Corp | Gasket for sealing a casket |
GB1539261A (en) * | 1975-11-15 | 1979-01-31 | Daimler Benz Ag | Cover-sealing arrangement |
US4293138A (en) * | 1978-09-12 | 1981-10-06 | Pidou B.V. | Sealing device |
WO1995017771A1 (en) * | 1993-12-22 | 1995-06-29 | United Technologies Corporation | Crossed-ridge sealing surface |
JPH07224941A (en) * | 1993-12-13 | 1995-08-22 | Sekisui Chem Co Ltd | Packing for branch pipe coupler |
WO1999035421A1 (en) * | 1998-01-12 | 1999-07-15 | S & B Technical Products, Inc. | Pipe gasket with improved low insertion geometry |
DE19946133A1 (en) * | 1999-09-27 | 2001-03-29 | Electrolux Siegen Gmbh | Lip sealing ring for pipe joints comprises circumferential sealing lips which radially protrude outwards and/or inwards from ring body element |
GB2388637A (en) * | 2002-04-10 | 2003-11-19 | Nat Coupling Co Inc | An undersea hydraulic pipe coupling having radially extending sealing surfaces |
JP2007182950A (en) * | 2006-01-10 | 2007-07-19 | Nippon Pillar Packing Co Ltd | Spiral gasket |
EP1900980A1 (en) * | 2005-07-07 | 2008-03-19 | NOK Corporation | Gasket |
US7513536B2 (en) * | 2004-09-07 | 2009-04-07 | S & B Technical Products, Inc. | Pipe gasket with selective economy of scale |
-
2009
- 2009-02-13 GB GB0902430A patent/GB2460912B/en active Active
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3150876A (en) * | 1961-11-14 | 1964-09-29 | Wylie M Lafferty | Sealing structure for pipe joints |
US3892417A (en) * | 1973-08-27 | 1975-07-01 | American Funeral Supply Corp | Gasket for sealing a casket |
GB1539261A (en) * | 1975-11-15 | 1979-01-31 | Daimler Benz Ag | Cover-sealing arrangement |
US4293138A (en) * | 1978-09-12 | 1981-10-06 | Pidou B.V. | Sealing device |
JPH07224941A (en) * | 1993-12-13 | 1995-08-22 | Sekisui Chem Co Ltd | Packing for branch pipe coupler |
WO1995017771A1 (en) * | 1993-12-22 | 1995-06-29 | United Technologies Corporation | Crossed-ridge sealing surface |
WO1999035421A1 (en) * | 1998-01-12 | 1999-07-15 | S & B Technical Products, Inc. | Pipe gasket with improved low insertion geometry |
DE19946133A1 (en) * | 1999-09-27 | 2001-03-29 | Electrolux Siegen Gmbh | Lip sealing ring for pipe joints comprises circumferential sealing lips which radially protrude outwards and/or inwards from ring body element |
GB2388637A (en) * | 2002-04-10 | 2003-11-19 | Nat Coupling Co Inc | An undersea hydraulic pipe coupling having radially extending sealing surfaces |
US7513536B2 (en) * | 2004-09-07 | 2009-04-07 | S & B Technical Products, Inc. | Pipe gasket with selective economy of scale |
EP1900980A1 (en) * | 2005-07-07 | 2008-03-19 | NOK Corporation | Gasket |
JP2007182950A (en) * | 2006-01-10 | 2007-07-19 | Nippon Pillar Packing Co Ltd | Spiral gasket |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2469858B (en) * | 2009-04-30 | 2013-10-16 | Vip Polymers Ltd | Pipe coupling |
NL2010057C2 (en) * | 2012-12-24 | 2014-06-25 | Fischer Georg Waga Nv | A coupling device for coupling with a tube. |
WO2014102045A1 (en) * | 2012-12-24 | 2014-07-03 | Georg Fischer Waga N.V. | A coupling device for coupling with a tube |
Also Published As
Publication number | Publication date |
---|---|
GB2460912B (en) | 2010-12-22 |
GB0902430D0 (en) | 2009-04-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7204525B2 (en) | Flowline clamp connector | |
KR101512940B1 (en) | Pipe connecting apparatus for water service | |
CA2522770A1 (en) | Gasket for pipe coupling and pipe coupling incorporating same | |
TW200923239A (en) | Loose flange type pipe joint | |
US10663098B2 (en) | Dismantling joint | |
US9909695B2 (en) | Joint lock ring system for lined pipes | |
US11585442B2 (en) | Hose coupling seal | |
WO2018000538A1 (en) | Unmanned shipborne pipeline maintenance fixture | |
US20170241578A1 (en) | Pipe connecting device | |
GB2460912A (en) | An annular gasket | |
US3917324A (en) | Pipe joint | |
JP5616715B2 (en) | Piping construction confirmation method | |
US20160377208A1 (en) | Gasket for Threaded Pipe Flange | |
KR20140002952U (en) | The fitting to prevent leaks | |
KR102540073B1 (en) | Double watertight structure for water service pipe | |
US2708951A (en) | Repair sleeve | |
KR20110110501A (en) | Steel special joint unit | |
CA3054622A1 (en) | Pipe coupling encapsulation assembly | |
JP6713287B2 (en) | Repair joint | |
RU169897U1 (en) | CLUTCH FOR REPAIR OF SOCKET CONNECTIONS | |
JP2009144759A (en) | Liquid leakage preventive bolt and nut for flange joint and liquid leakage part repairing method using the liquid leakage preventive bolt and nut for flange joint | |
CN201891980U (en) | Copying pipe fitting | |
US20210088234A1 (en) | Resin-coated aluminum pipe connector for air conditioner outdoor unit | |
KR200449133Y1 (en) | Test Reducer | |
KR20210046188A (en) | Welding Zero 2 track O-ring LEE Joint Polygon Flange |