US20010040378A1 - Face seal gland with raised peripheral ring having circumferentially spaced recesses - Google Patents
Face seal gland with raised peripheral ring having circumferentially spaced recesses Download PDFInfo
- Publication number
- US20010040378A1 US20010040378A1 US08/929,719 US92971997A US2001040378A1 US 20010040378 A1 US20010040378 A1 US 20010040378A1 US 92971997 A US92971997 A US 92971997A US 2001040378 A1 US2001040378 A1 US 2001040378A1
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- United States
- Prior art keywords
- gasket
- bead
- coupling member
- gland
- coupling
- 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.)
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Classifications
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- 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
- F16L19/0218—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means comprising only sealing rings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S285/00—Pipe joints or couplings
- Y10S285/917—Metallic seals
Definitions
- the present invention contemplates a new and improved coupling assembly that overcomes all of the above referenced problems and others and provides positive stop feedback, resists torque and elimination of relative motion between mating components, and increases the resistance of the coupling assembly to loosening.
- a preferred form of coupling assembly includes end faces of glands/coupling members disposed for sealing against opposite faces of an annular gasket.
- the end faces include a bead extending outwardly from the bore of the gland/coupling member, an annular substantially planar region disposed radially outward thereof, and a raised ring located radially outward of the annular planar region.
- the ring includes a recess for receiving the gasket therein during make-up of the coupling assembly.
- the raised ring extends axially outward from the end face a dimension greater than the seal bead.
- a principal advantage of the invention is the ability to lock the gasket relative to the coupling members through use of the raised ring.
- Still another advantage of the invention resides in the increase in torque associated with the annular planar region that provides a distinct feedback to the user during make-up.
- Still another advantage of the invention resides in the additional sealing area provided by the annular planar region and, ultimately, a coupling assembly that exhibits increased resistance to loosening due to torque applied to the made-up assembly.
- FIG. 1 which is an exploded longitudinal cross-sectional view of the individual components of a preferred coupling assembly
- FIG. 2A is a longitudinal cross-sectional view of the assembly in a made-up condition
- FIG. 2B is an enlarged view of the encircled region of FIG. 2A showing the made-up coupling assembly
- FIG. 3 is an enlarged detail view of the encircled area in FIG. 1;
- FIG. 4 is an elevational view of the seal face of the coupling member
- FIG. 5 is a schematic representation of the increased torque associated with the coupling assembly compared to prior arrangements
- FIG. 6 is a longitudinal cross-sectional view of a universal use of the present invention with a conventional coupling member
- FIG. 7A is an elevational view of the preferred end face shown on a block body.
- FIG. 7B is an end view taken generally from the right-hand side of FIG. 7A.
- FIG. 1 a preferred embodiment of a coupling assembly A is shown therein. It includes a first coupling member or gland 10 and a second coupling member or gland 12 .
- the coupling member may be a gland (as illustrated in FIG. 1) or a surface of a fluid component such as a valve, regulator, or the like, that is to be sealingly connected to another coupling member.
- a gland as illustrated in FIG. 1
- a fluid component such as a valve, regulator, or the like
- a first end 14 of the gland is adapted for connection with a fluid system (not shown) such as a tube or pipe.
- a second end 16 of the gland has an enlarged diameter dimension that defines a rear shoulder 18 that faces the first end 14 and a seal or end face 20 facing in the opposite direction.
- each gland has a through bore or passage 22 that extends from the first end to the second end.
- the passage provides fluid communication through the coupling assembly.
- a nut assembly 30 defined by a first or male nut member 32 and a second or female nut member 34 , is received about the facing glands. That is, the end faces are disposed in opposed facing relation so that the through passages of the glands are in substantially aligned relation.
- the male nut member 32 includes external threads 36 that cooperate with internal threads 38 of the female member.
- Tool or wrench flats 40 are typically provided on the nut members to facilitate make-up of the fitting, i.e., threaded advancement of the male member relative to the female nut member, thereby urging the first and second glands toward one another (FIG. 2A).
- an end 42 in the male nut member engages the radial shoulder 18 of the first gland.
- a shoulder 44 of the female nut member engages the rear shoulder 18 of the second gland.
- annular flat metal gasket 50 Interposed between the end faces of the first and second glands is an annular flat metal gasket 50 .
- the gasket has an inner opening 52 that substantially matches that of the diameter of the through passages in the glands. Additionally, the outer perimeter of the gasket is dimensioned to be approximately the same diameter as the terminal edge perimeter of the end faces. Thus, the gasket is located between the first and second glands.
- each end face 20 of the respective first and second glands are adapted to sealingly engage opposed faces of a gasket.
- each end face includes a circumferentially continuous bead 60 preferably defined by a smooth arcuate or curved surface (FIGS. 2B and 3).
- a preferred bead configuration has a generally arcuate shape defined by a generally constant radius (FIG. 3).
- the center of curvature is disposed radially outward from the wall of the through passage a dimension closely approximating the radius of the curve, although the bead is intended to extend axially outward from the end face of the gland.
- the inner radial edge portion of the bead is smoothly transitioned into the through passage.
- a chamfered surface 62 interconnects the seal bead profile with the wall defining the through passage of the gland.
- the bead is disposed at the radial inner area of the end face and protrudes axially outward from the seal face a predetermined dimension D 1 .
- a substantially annular planar region 64 that extends over a substantial portion of the overall radial dimension of the gland seal face.
- the planar region 64 is recessed relative to the bead on the order of thousandths of an inch.
- the planar region provides a positive feedback to the user upon make-up of the coupling assembly since when it contacts the gasket it provides an increase in the torque. This torque increase acts as a positive feedback to the user making up the coupling assembly.
- a raised rim 70 Disposed at the radial outermost portion of the seal face is a raised rim 70 . While the bead and planar region are circumferentially continuous, the raised rim is substantially continuous. It includes first and second recesses 72 , 74 (FIG. 4) which extend axially inward only a few thousandths of an inch into the raised rim. Preferably the recesses 72 , 74 are disposed in diametrically opposed relation. It will be understood, however, that the recesses preferably only extend in a circumferential direction over a minor portion of the entire circumference. This will become more apparent for reasons to be detailed below. Moreover, although a different number of recesses can be provided, the preferred arrangement includes discreet spaced recesses as opposed to a continuous series of recess such as a knurled perimeter. Again, this will become more apparent for reasons to be described further below.
- the raised rim extends axially outward from the seal face a height or a dimension D 2 (FIG. 3) slightly greater than that of the bead. This dimensioning assures that the seal face engages the gasket initially along the raised rim. As the coupling assembly is made-up, relative rotation between the coupling member and gasket is thus prevented.
- D 2 a dimension
- the receipt of the gasket in the recesses provides a locking feature which assures that the gasket and the coupling member do not rotate relative to one another, even at elevated torque levels.
- the gasket would fail and shear as opposed to the gasket rotating relative to the coupling member because of the recess provided in the raised rim.
- the gasket forms a primary seal between the beads 60 . Moreover, that radial portion of the gasket between the bead and the raised rim is received in the cavity defined by the planar region 64 . This cavity is ultimately filled with gasket material radially outward of the primary seal of the beads. Further, once the annular portion of the gasket engages the enlarged, radial planar region 64 the seal face, a substantial increase in torque is experienced by the user during make-up. This, of course, is related to the larger surface area of contact between the gasket and the coupling member. Turning, for example, to FIG.
- upper curve 80 illustrates the substantial increase in torque (y-axis) associated with the tube coupling assembly as it is made-up, e.g., turns past finger tight (x-axis).
- a conventional, prior art arrangement which exhibits a more linear increase is shown as bottom curve 82 .
- the more rapid increase of the upper curve 80 relative to the lower curve 82 provides a positive feedback or indication to the use during make-up that the desired amount of displacement has occurred and make-up of the fitting is complete.
- the preferred sealing pressure is applied to the gasket, and the gasket substantially fills any dead space disposed radially inward of the bead so that a region of low dead space is provided by the completed coupling assembly.
- FIG. 6 illustrates the universal adaptability of the present coupling assembly to existing systems.
- the first gland or coupling member 10 is constructed as described in detail above.
- the second or right-hand gland or coupling member 10 ′ is of a conventional structure. That is, the beads are disposed at a radial median region of the enlarged diameter shoulder of the coupling member. Thus, there is no raised peripheral rim nor is there any substantially planar region that extends over a major portion of the radial seal face.
- the conventional median-spaced bead of the second coupling member is adapted to contact the gasket in a region opposite that of the planar region 64 associated with a new coupling member.
- make-up of the fitting allows an old-style coupling member 10 ′ to be functionally compatible with the new-style coupling member 10 .
- the bead 90 of the prior style of coupling member urges the gasket material axially inward into the planar region 64 of the new-style coupling member.
- the new-style coupling member provides a universal comparability with conventional coupling members already in use.
- FIGS. 7A and 7B also demonstrate that the coupling assembly is not limited to tube coupling arrangements. That is, an end face of a block 92 such as a valve, regulator, etc. is formed with the preferred bead, substantially planar region, and raised rim configuration as described above. A fastener(s) (not shown) associated with the coupling member to be secured to the block engages the external threads 94 integrally formed in the block to urge the end faces together toward opposite faces of the gasket.
- the coupling assembly is substantially identical in structure and function to that described above.
Abstract
Description
- This invention is concerned with couplings of the type shown and described in U.S. Pat. Nos. 3,521,910 and 5,145,219. These patents are incorporated herein by reference and describe tube couplings wherein first and second coupling components or glands with central through passages or bores are disposed in mating relation. Particularly, end faces include annular raised beads arranged to sealingly engage on opposite sides of an annular metal gasket. A threaded nut assembly acts to drive the end faces toward each other and cause the beads to sealingly engage the gasket. The sealing end faces can be located on separate glands or on a “block”, e.g. a face of a fluid component such as a valve, regulator, etc.
- Commercially successful versions of this type of coupling assembly require a desired amount of compression of the sealing end faces on opposite sides of the gasket. This is achieved by design of the components and instructing the user to rotate the nut assembly a predetermined amount. Because of the pitch of the thread and the design of the individual components, a desired compression is thus achieved.
- In order to eliminate the potential for over tightening by the user, it has been suggested that a restraint be provided to limit the amount of compression imposed on the seal gasket. For example, U.S. Pat. No. 5,482,332 provides axial projections adapted to engage one another and limit the potential for over tightening.
- Still another concern with the face seals of this general type is relative movement between the end face seals and the gasket. In order that a precise seal be formed, it is desired that the gasket be locked into place relative to end faces and that the end faces be axially advanced toward one another and into sealing engagement with opposite faces of the gasket.
- It is also desired that the sealed relationship between the gasket and the respective glands be maintained even if torque is applied to the fitting after make-up. For example, if torque is applied to a tube end while the remainder of the coupling assembly is held in place, then there is a concern that the seal may be compromised.
- Still another issue associated with these coupling assemblies is the requirement for ultra-high purity. That is, the ultra-clean environment associated with these types of fluid components requires elimination of minute particles that might otherwise be ignored in less demanding environments. Any opportunity to decrease the prospect for particle generation is desired.
- The present invention contemplates a new and improved coupling assembly that overcomes all of the above referenced problems and others and provides positive stop feedback, resists torque and elimination of relative motion between mating components, and increases the resistance of the coupling assembly to loosening.
- According to the present invention, a preferred form of coupling assembly includes end faces of glands/coupling members disposed for sealing against opposite faces of an annular gasket. The end faces include a bead extending outwardly from the bore of the gland/coupling member, an annular substantially planar region disposed radially outward thereof, and a raised ring located radially outward of the annular planar region.
- According to another aspect of the invention, the ring includes a recess for receiving the gasket therein during make-up of the coupling assembly.
- According to another aspect of the invention, the raised ring extends axially outward from the end face a dimension greater than the seal bead.
- A principal advantage of the invention is the ability to lock the gasket relative to the coupling members through use of the raised ring.
- Still another advantage of the invention resides in the increase in torque associated with the annular planar region that provides a distinct feedback to the user during make-up.
- Still another advantage of the invention resides in the additional sealing area provided by the annular planar region and, ultimately, a coupling assembly that exhibits increased resistance to loosening due to torque applied to the made-up assembly.
- Still other advantages and benefits of the invention will become apparent to those skilled in the art upon a reading and understanding of the following detailed description.
- The invention may take physical form in certain parts and arrangements of parts. Preferred embodiments of the invention will be described in detail in the specification and illustrated in the accompanying drawings. The drawings include:
- FIG. 1 which is an exploded longitudinal cross-sectional view of the individual components of a preferred coupling assembly;
- FIG. 2A is a longitudinal cross-sectional view of the assembly in a made-up condition;
- FIG. 2B is an enlarged view of the encircled region of FIG. 2A showing the made-up coupling assembly;
- FIG. 3 is an enlarged detail view of the encircled area in FIG. 1;
- FIG. 4 is an elevational view of the seal face of the coupling member;
- FIG. 5 is a schematic representation of the increased torque associated with the coupling assembly compared to prior arrangements;
- FIG. 6 is a longitudinal cross-sectional view of a universal use of the present invention with a conventional coupling member;
- FIG. 7A is an elevational view of the preferred end face shown on a block body; and;
- FIG. 7B is an end view taken generally from the right-hand side of FIG. 7A.
- Reference is now made to the drawings which illustrate the preferred embodiment of the invention only and are not intended as a limitation. Turning first to FIG. 1, a preferred embodiment of a coupling assembly A is shown therein. It includes a first coupling member or
gland 10 and a second coupling member orgland 12. As briefly mentioned above, the coupling member may be a gland (as illustrated in FIG. 1) or a surface of a fluid component such as a valve, regulator, or the like, that is to be sealingly connected to another coupling member. Thus, the following description applies to various types of coupling members and should not be construed as being limited to the preferred embodiment shown unless specifically noted. Each gland is of generally hollow cylindrical configuration and like reference numerals will refer to like parts. Afirst end 14 of the gland is adapted for connection with a fluid system (not shown) such as a tube or pipe. Asecond end 16 of the gland has an enlarged diameter dimension that defines arear shoulder 18 that faces thefirst end 14 and a seal orend face 20 facing in the opposite direction. Before describing the particulars of the end face, the remainder of the tube coupling assembly will be described, since it is relatively conventional and well-known. - For example, each gland has a through bore or
passage 22 that extends from the first end to the second end. As will be understood, the passage provides fluid communication through the coupling assembly. Anut assembly 30, defined by a first ormale nut member 32 and a second orfemale nut member 34, is received about the facing glands. That is, the end faces are disposed in opposed facing relation so that the through passages of the glands are in substantially aligned relation. As is well known in the art, themale nut member 32 includesexternal threads 36 that cooperate withinternal threads 38 of the female member. Tool orwrench flats 40 are typically provided on the nut members to facilitate make-up of the fitting, i.e., threaded advancement of the male member relative to the female nut member, thereby urging the first and second glands toward one another (FIG. 2A). In this particular arrangement, anend 42 in the male nut member engages theradial shoulder 18 of the first gland. Likewise, ashoulder 44 of the female nut member engages therear shoulder 18 of the second gland. Thus, as the nut assembly is tightened, the glands are axially advanced toward one another. - Interposed between the end faces of the first and second glands is an annular
flat metal gasket 50. The gasket has aninner opening 52 that substantially matches that of the diameter of the through passages in the glands. Additionally, the outer perimeter of the gasket is dimensioned to be approximately the same diameter as the terminal edge perimeter of the end faces. Thus, the gasket is located between the first and second glands. - As previously indicated, the end faces20 of the respective first and second glands are adapted to sealingly engage opposed faces of a gasket. According to the preferred embodiment, each end face includes a circumferentially
continuous bead 60 preferably defined by a smooth arcuate or curved surface (FIGS. 2B and 3). A preferred bead configuration has a generally arcuate shape defined by a generally constant radius (FIG. 3). Of course, other bead profiles may be advantageously used without departing from the scope and intent of the present invention. Preferably the center of curvature is disposed radially outward from the wall of the through passage a dimension closely approximating the radius of the curve, although the bead is intended to extend axially outward from the end face of the gland. The inner radial edge portion of the bead is smoothly transitioned into the through passage. For example, a chamferedsurface 62 interconnects the seal bead profile with the wall defining the through passage of the gland. Thus, the bead is disposed at the radial inner area of the end face and protrudes axially outward from the seal face a predetermined dimension D1. - Extending radially outward from the bead is a substantially annular
planar region 64 that extends over a substantial portion of the overall radial dimension of the gland seal face. Theplanar region 64 is recessed relative to the bead on the order of thousandths of an inch. As will become described in greater detail below, the planar region provides a positive feedback to the user upon make-up of the coupling assembly since when it contacts the gasket it provides an increase in the torque. This torque increase acts as a positive feedback to the user making up the coupling assembly. - Disposed at the radial outermost portion of the seal face is a raised
rim 70. While the bead and planar region are circumferentially continuous, the raised rim is substantially continuous. It includes first andsecond recesses 72, 74 (FIG. 4) which extend axially inward only a few thousandths of an inch into the raised rim. Preferably therecesses - The raised rim extends axially outward from the seal face a height or a dimension D2 (FIG. 3) slightly greater than that of the bead. This dimensioning assures that the seal face engages the gasket initially along the raised rim. As the coupling assembly is made-up, relative rotation between the coupling member and gasket is thus prevented. Continued axial advancement of the coupling members toward one another and into compressed, sealing engagement with opposite faces of the gasket ultimately results in gasket material being axially displaced into the
recess 72, 74 (FIG. 2B). The receipt of the gasket in the recesses provides a locking feature which assures that the gasket and the coupling member do not rotate relative to one another, even at elevated torque levels. Preferably, if undue torque were applied, the gasket would fail and shear as opposed to the gasket rotating relative to the coupling member because of the recess provided in the raised rim. - As the coupling members are advanced toward one another during make-up of the assembly, the gasket forms a primary seal between the
beads 60. Moreover, that radial portion of the gasket between the bead and the raised rim is received in the cavity defined by theplanar region 64. This cavity is ultimately filled with gasket material radially outward of the primary seal of the beads. Further, once the annular portion of the gasket engages the enlarged, radialplanar region 64 the seal face, a substantial increase in torque is experienced by the user during make-up. This, of course, is related to the larger surface area of contact between the gasket and the coupling member. Turning, for example, to FIG. 5, upper curve 80 illustrates the substantial increase in torque (y-axis) associated with the tube coupling assembly as it is made-up, e.g., turns past finger tight (x-axis). A conventional, prior art arrangement which exhibits a more linear increase is shown asbottom curve 82. Thus, the more rapid increase of the upper curve 80 relative to thelower curve 82 provides a positive feedback or indication to the use during make-up that the desired amount of displacement has occurred and make-up of the fitting is complete. - At the time of a substantial increase in torque, the preferred sealing pressure is applied to the gasket, and the gasket substantially fills any dead space disposed radially inward of the bead so that a region of low dead space is provided by the completed coupling assembly.
- FIG. 6 illustrates the universal adaptability of the present coupling assembly to existing systems. There, the first gland or
coupling member 10 is constructed as described in detail above. The second or right-hand gland orcoupling member 10′ is of a conventional structure. That is, the beads are disposed at a radial median region of the enlarged diameter shoulder of the coupling member. Thus, there is no raised peripheral rim nor is there any substantially planar region that extends over a major portion of the radial seal face. However, the conventional median-spaced bead of the second coupling member is adapted to contact the gasket in a region opposite that of theplanar region 64 associated with a new coupling member. Thus, make-up of the fitting allows an old-style coupling member 10′ to be functionally compatible with the new-style coupling member 10. The bead 90 of the prior style of coupling member urges the gasket material axially inward into theplanar region 64 of the new-style coupling member. Thus, as components of the coupling assembly are necessarily replaced, the new-style coupling member provides a universal comparability with conventional coupling members already in use. - FIGS. 7A and 7B also demonstrate that the coupling assembly is not limited to tube coupling arrangements. That is, an end face of a
block 92 such as a valve, regulator, etc. is formed with the preferred bead, substantially planar region, and raised rim configuration as described above. A fastener(s) (not shown) associated with the coupling member to be secured to the block engages theexternal threads 94 integrally formed in the block to urge the end faces together toward opposite faces of the gasket. In all other respects, the coupling assembly is substantially identical in structure and function to that described above. - The invention has been described with reference to the preferred embodiments. Obviously, changes and modifications will become apparent to those skilled in the art and the present invention is intended to cover such changes insofar as they fall within the scope of the appended claims.
Claims (19)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/929,719 US6318766B1 (en) | 1997-09-15 | 1997-09-15 | Face seal gland with raised peripheral ring having circumferentially spaced recesses |
PCT/US1998/019087 WO1999014525A1 (en) | 1997-09-15 | 1998-09-15 | Face seal gland |
EP98948191A EP1015803A1 (en) | 1997-09-15 | 1998-09-15 | Face seal gland |
IL13504998A IL135049A0 (en) | 1997-09-15 | 1998-09-15 | Face seal gland |
KR1020007002693A KR20010023976A (en) | 1997-09-15 | 1998-09-15 | Face seal gland |
JP2000512031A JP2001516862A (en) | 1997-09-15 | 1998-09-15 | Ground sealed with surface |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/929,719 US6318766B1 (en) | 1997-09-15 | 1997-09-15 | Face seal gland with raised peripheral ring having circumferentially spaced recesses |
Publications (2)
Publication Number | Publication Date |
---|---|
US20010040378A1 true US20010040378A1 (en) | 2001-11-15 |
US6318766B1 US6318766B1 (en) | 2001-11-20 |
Family
ID=25458341
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/929,719 Expired - Fee Related US6318766B1 (en) | 1997-09-15 | 1997-09-15 | Face seal gland with raised peripheral ring having circumferentially spaced recesses |
Country Status (6)
Country | Link |
---|---|
US (1) | US6318766B1 (en) |
EP (1) | EP1015803A1 (en) |
JP (1) | JP2001516862A (en) |
KR (1) | KR20010023976A (en) |
IL (1) | IL135049A0 (en) |
WO (1) | WO1999014525A1 (en) |
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US20170120429A1 (en) * | 2015-10-28 | 2017-05-04 | UCT Additive Manufacturing Center Pte. Ltd. | Precision connections and methods of forming same |
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US20090232595A1 (en) * | 2008-03-13 | 2009-09-17 | Benjamin Willemstyn | Connector, Gasket and Method of Attaching The Same |
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---|---|---|---|---|
US3521910A (en) | 1968-11-12 | 1970-07-28 | Cajon Co | Tube coupling |
US3747963A (en) | 1972-05-17 | 1973-07-24 | Cajon Co | High vacuum flange assembly with o-ring gasket |
US4303251A (en) | 1978-12-04 | 1981-12-01 | Varian Associates, Inc. | Flange sealing joint with removable metal gasket |
IT207607Z2 (en) * | 1986-04-18 | 1988-02-08 | Zoboli Walter | DIELECTRIC COUPLING OF THE PERFECT TYPE, ESPECIALLY FOR METAL CONDUCT OF LIQUIDS AND / OR GASES |
WO1989003495A1 (en) | 1987-10-09 | 1989-04-20 | Eferel S.A. | Connector with interchangeable annular metal joint |
US5145219A (en) | 1990-08-01 | 1992-09-08 | Cajon Company | Tube coupling with gasket retainer |
WO1992019891A2 (en) | 1991-05-09 | 1992-11-12 | Bostec Engineering, Inc. | Gland and seal |
US5251941A (en) | 1991-10-11 | 1993-10-12 | General Components, Inc. | Fail safe fitting with first and second flange projections |
US5366261A (en) * | 1992-04-27 | 1994-11-22 | Fujikin Incorporated | Pipe joint with a gasket retainer |
IL118267A (en) | 1995-08-09 | 2000-02-17 | Ohmi Tadahiro | Pipe joint |
-
1997
- 1997-09-15 US US08/929,719 patent/US6318766B1/en not_active Expired - Fee Related
-
1998
- 1998-09-15 WO PCT/US1998/019087 patent/WO1999014525A1/en not_active Application Discontinuation
- 1998-09-15 KR KR1020007002693A patent/KR20010023976A/en not_active Application Discontinuation
- 1998-09-15 IL IL13504998A patent/IL135049A0/en unknown
- 1998-09-15 EP EP98948191A patent/EP1015803A1/en not_active Withdrawn
- 1998-09-15 JP JP2000512031A patent/JP2001516862A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104024715A (en) * | 2011-12-27 | 2014-09-03 | 中央硝子株式会社 | Fitting for gas filling container, gas filling container, gasket, and pipe fitting |
US20170120429A1 (en) * | 2015-10-28 | 2017-05-04 | UCT Additive Manufacturing Center Pte. Ltd. | Precision connections and methods of forming same |
US10144119B2 (en) * | 2015-10-28 | 2018-12-04 | UCT Additive Manufacturing Center Pte. Ltd. | Precision connections and methods of forming same |
US11041566B2 (en) | 2016-10-31 | 2021-06-22 | Fujikin Incorporated | Seal structure, sealing method, and coupling equipped with said seal structure |
US11953135B2 (en) | 2017-07-04 | 2024-04-09 | Nippon Pillar Packing Co., Ltd. | Fitting assembly for fluid device |
Also Published As
Publication number | Publication date |
---|---|
JP2001516862A (en) | 2001-10-02 |
EP1015803A1 (en) | 2000-07-05 |
IL135049A0 (en) | 2001-05-20 |
WO1999014525A1 (en) | 1999-03-25 |
KR20010023976A (en) | 2001-03-26 |
US6318766B1 (en) | 2001-11-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SWAGELOK MARKETING CO., OHIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BABUDER, GERALD A.;BARNEY, TIMOTHY A.;PIPER, GREGORY L.;REEL/FRAME:009101/0243 Effective date: 19980324 |
|
AS | Assignment |
Owner name: SWAGELOK COMPANY, OHIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SWAGELOK MARKETING CO.;REEL/FRAME:010547/0948 Effective date: 20000111 |
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REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20051120 |