WO2001021993A2 - Pipe fitting gasket having enhanced surface properties - Google Patents
Pipe fitting gasket having enhanced surface properties Download PDFInfo
- Publication number
- WO2001021993A2 WO2001021993A2 PCT/US2000/025442 US0025442W WO0121993A2 WO 2001021993 A2 WO2001021993 A2 WO 2001021993A2 US 0025442 W US0025442 W US 0025442W WO 0121993 A2 WO0121993 A2 WO 0121993A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gasket
- film
- lubricant
- waxes
- forming polymer
- Prior art date
Links
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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L17/00—Joints with packing adapted to sealing by fluid pressure
- F16L17/02—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket
- F16L17/04—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket with longitudinally split or divided sleeve
-
- 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
- Y10S277/00—Seal for a joint or juncture
- Y10S277/935—Seal made of a particular material
- Y10S277/936—Composite
Definitions
- the present invention relates to a gasket having a dry lubricant and, more particularly, to an elastomeric gasket for use in any system using an elastomeric gasket, for example, pipe couplings.
- the benefits of the present invention may be beneficially applied to any system in which a dry lubricant can be used to assist gasket seating and emplacement.
- Typical of such pipe couplings are the (i) groove pipe couplings as typically shown in the U.S. Patent 4,601,495, (ii) the T couplings for branch pipes to be secured to a main pipe, as typically shown in U.S. Patent 3,999,785, (iii) the cam actuated couplings, as typically shown in U.S. patent 4,165,892, and (iv) the boltless locking pin secured couplings as typically shown in U.S. patent 4,561,678, all of which are assigned to the assignee of the present invention and the disclosures of which are incorporated herein by reference.
- a deformable gasket which is typically constructed of an elastomeric compound, such as natural or synthetic rubber.
- the gasket is contained within a suitably configured recess and is employed to seal the pipes meeting at the coupling, to prevent leakage when the coupling is in an assembled condition.
- the installer must then remove, clean, and lubricate the gasket during the process of installing the coupling joint onto the pipe.
- FIG. 1 is an exploded perspective view of one form of a segmented pipe coupling intended to utilize the gasket of the present invention.
- Fig. 2 is an enlarged sectional view taken along the line 2-2 of the gasket of FIG. 1.
- the present invention provides an elastomeric gasket or seal, for use in sealing devices designed to make a pressure-tight joint between stationary parts to prevent the leakage of liquids and fluids, which has a dry lubricating film adhered to its surface.
- the present invention finds particular application with respect to gaskets used in pipe couplings for grooved pipe.
- the solid, dry lubricating film provides continuous and uniform lubrication so that the coupling slides easily, gasket pinching is prevented and ready rotation of the coupling is facilitated.
- FIG. 1 there is depicted one form of a segmented pipe coupling intended for grooved pipe and which includes the gasket of the present invention having a dry lubricant film adhered to its surface.
- This coupling is of the type which is the subject of the aforementioned U.S. Patent
- the segmented coupling of Fig. 1 is illustrated in disassembled condition, with the respective coupling segments being indicated at 10 and 12.
- the coupling segments are identical with each other and are substantially semi-circular in form, each coupling member half being comprised by an arcuate body portion 14 which terminates at its ends in radially outwardly extending bolting pads 16 formed integrally with the body portion 14.
- Each of the radially outwardly extending bolting pads 16 includes apertures 18 for the reception of fastening members, which, in the drawing, are shown as headed bolts 20.
- fastening members which, in the drawing, are shown as headed bolts 20.
- the respective coupling segments 10 and 12 are secured to each other in encircling relationship with the pipe ends by the headed bolts 20 and conventional nuts or lock nuts 22 threadedly received on the bolts.
- a recess 26 Internally of each coupling segment half 10 and 12 and intermediate the axial length thereof in the embodiment illustrated, is a recess 26 in which a gasket 28 is accommodated, having a dry lubricating film 29 bonded thereto in accordance with the present invention, the gasket 28 being employed to seal the pipes 24 when the coupling is in an assembled condition and prevent leakage.
- each coupling segment Located immediately adjacent the recess 26 in each coupling segment is an axially inner key 30 formed integrally with the coupling segment, and, spaced from each of the axially inner keys 30 are axially outer keys 32, which similarly are formed integrally with the respective coupling segments.
- the invention may also be used in similar grooved pipe couplings intended for lower pressure applications which may include only a single key for each pipe.
- the respective keys 30 and 32 are dimensioned, as later discussed, for them to be received within corresponding axially spaced annular grooves 34 formed in the respective pipes adjacent the ends thereof.
- the respective coupling segments are positioned over the gasket 28 with the gasket contained within the recess 26, and the keys 30 and 32 are inserted into the annular grooves 34 in the respective pipe ends.
- the bolts 20 are then inserted through the aligned apertures 18 of the coupling segments, and the coupling segments are drawn towards each other by tightening the nuts 22 down on the bolts 20. This draws the respective coupling segments towards the pipes, and compresses the gasket 28 into intimate sealing contact with the respective pipe ends.
- the respective coupling segments may be formed by any known techniques, such as by pressing or drop-forging steel or any other suitable high-strength metal, the respective coupling segments are formed by close tolerance casting techniques from ductile iron or a similar high-strength metal.
- the inner surface of gasket 28 when viewed in cross-section, defines a substantially U-shaped channel having a flat upper surface 28a which merges into inwardly inclined inner lips 28b.
- the outer surface of gasket 28 includes a flat upper surface 28c which merges into downwardly and outwardly extending sidewalls 28d and then into
- the gasket lubricant of the present invention comprises a lubricant in
- the elastomeric gaskets which can be used in accordance with the present invention are typically made from various synthetic rubbers.
- Exemplary elastomeric gaskets can be made from EPDM, nitrile rubber, epichlorohydrin, neoprene, silicone and halogenated butyl rubber.
- the lubricant employed in the present invention is an aqueous suspension of graphite, soaps or a natural or synthetic wax dispersed in a film- forming polymer, with waxes being preferred.
- Suitable waxes include natural waxes, such as beeswax, spermaceti, carnauba wax, candelilla wax, montan wax, ozocerite wax (ceresin wax), paraffin waxes and petrolatum waxes, amongst others; and synthetic waxes, such as long-chain polymers of ethylene, long-chain polymers of ethylene oxide combined with a dihydric alcohol, e.g.
- Carbowax poly oxy ethylene glycol
- Halowaxes chlorinated naphthalenes
- waxy polyol ether- esters e.g., poly oxy ethylene sorbitol
- synthetic hydrocarbon waxes Fischer- Tropsch waxes
- straight-chain wax-like ketones e.gs., laurone, palmitone and stearone
- cylic ketones e.g., phenoxyphenyl heptadecyl ketone
- amide derivatives of fatty acids phthalimide waxes
- poly oxy ethylene fatty acid esters e.g., "Carbowax 4000 (Mono) Stearate”
- Paraffin waxes are especially preferred due to their ready availability.
- the lubricant e.g. wax
- a water-miscible polymer comprising an ether of a polypropylene
- Preferred polypropylene glycol ethers for use in the practice of the present invention are monoalkyl ethers of tripropylene glycol, with the use of tripropylene glycol monomethyl ether being particularly preferred.
- PTFE polytetrafluoroethylene
- a lubricating film of the present invention is applied to the gaskets after their manufacture by any of a variety of conventional application methods including spraying, fogging, dipping, sponging, painting, etc.
- HVLP high volume, low pressure
- Uniform application is insured by placing the gaskets on a positioning belt and then employing a plurality of spray nozzles which emit an airborne mist which can apply a 1 mil film coating. Thereafter, in order to insure that the wax containing polymeric film is properly dried, air is directed at the gaskets having a wet film on their surface.
- the gaskets are removed from the belt and can be dried still further by heated air to complete the drying process.
- Completion of the curing of the polymer and its bonding to the elastomeric gasket in the form of a dry bonded film can be achieved by maintaining the gasket at ambient temperature for about 14 days. Curing and bonding can be accelerated, if desired, by subjecting the partially dried film to a temperature of about 150° F. for about 20 to about 35 minutes which is sufficient to complete the curing of the polymer.
- gaskets in accordance with the present invention can be shipped to the installation site without need of further protection, it may be advantageous to package them in a protective environment, such as a clear plastic shrink wrap which is the subject of patent application Serial No. 09/162,954, filed September 29, 1998, the disclosure of which is incorporated herein by reference and which is assigned to the assignee of the present
- Elastomeric gaskets having a dry lubricating film deposited thereon in accordance with the present invention are, once they are dried, stable in water. It has been determined that pre-lubricated gaskets in accordance with the present invention meet NSF Standard 14 as being completely safe for the passage of potable water through pipes coupled with such gaskets. Further, once the lubricant is applied to the gasket, it will not run or seep out, as is the case with conventional gasket lubricants. Thus, plant personnel are provided with visible assurance and a high level of confidence that the gaskets are functioning properly and are providing sustained and continuous lubrication.
- gaskets were initially dried with air jets at ambient temperature. Thereafter, the gaskets were allowed to dry at ambient temperature for 14 days to complete the curing of the lubricating film to the surface of the
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00963545A EP1226380A2 (en) | 1999-09-21 | 2000-09-14 | Pipe fitting gasket having enhanced surface properties |
AU74945/00A AU756963B2 (en) | 1999-09-21 | 2000-09-14 | Pipe fitting gasket having enhanced surface properties |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/399,834 US6371491B1 (en) | 1999-09-21 | 1999-09-21 | Pipe fitting gasket having enhanced surface properties |
US09/399,834 | 1999-09-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001021993A2 true WO2001021993A2 (en) | 2001-03-29 |
WO2001021993A3 WO2001021993A3 (en) | 2001-10-04 |
Family
ID=23581148
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/025442 WO2001021993A2 (en) | 1999-09-21 | 2000-09-14 | Pipe fitting gasket having enhanced surface properties |
Country Status (7)
Country | Link |
---|---|
US (1) | US6371491B1 (en) |
EP (1) | EP1226380A2 (en) |
CN (1) | CN1384906A (en) |
AU (1) | AU756963B2 (en) |
PL (1) | PL366133A1 (en) |
TW (1) | TW521136B (en) |
WO (1) | WO2001021993A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003029712A1 (en) * | 2001-09-28 | 2003-04-10 | Central Sprinkler Corporation | Ferrous pipe couplings and prelubricated coupling gaskets |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6871838B2 (en) * | 2003-04-03 | 2005-03-29 | B. Braun Medical Inc. | Injection port valve |
JP2005225969A (en) * | 2004-02-12 | 2005-08-25 | Sumitomo Rubber Ind Ltd | Semiconductive rubber member |
JP5052498B2 (en) * | 2005-03-22 | 2012-10-17 | ストラブ ウェーク アーゲー | Fixing element for pipe connection |
US20100263884A1 (en) * | 2005-09-07 | 2010-10-21 | Lubrizol Advanced Materials, Inc. | System And Method Of Assembly Of CPVC Piping System Employing Mechanical Couplings And Supports |
US20070182106A1 (en) * | 2006-02-06 | 2007-08-09 | Biesenberger Jeffrey J | Lubeless pipe gasket and method of fabrication |
US8186721B2 (en) * | 2006-05-19 | 2012-05-29 | Oiles Corporation | Spherical annular seal member, exhaust pipe joint device using the same, and method of manufacturing spherical annular seal member |
US8282136B2 (en) | 2008-06-30 | 2012-10-09 | Mueller International, Llc | Slip on groove coupling with multiple sealing gasket |
US9140398B2 (en) | 2010-04-02 | 2015-09-22 | Pentair Flow Technologies, Llc | Air aspiration device |
US8608173B2 (en) * | 2011-08-25 | 2013-12-17 | Hamilton Sundstrand Corporation | Method and apparatus to provide sealing contact between first and second fueldraulic components |
US9039046B2 (en) | 2012-01-20 | 2015-05-26 | Mueller International, Llc | Coupling with tongue and groove |
US9500307B2 (en) | 2012-01-20 | 2016-11-22 | Mueller International, Llc | Slip-on coupling gasket |
US9534715B2 (en) | 2012-01-20 | 2017-01-03 | Mueller International, Llc | Coupling gasket with multiple sealing surfaces |
US9194516B2 (en) | 2012-01-20 | 2015-11-24 | Mueller International, Llc | Slip-on coupling |
US9168585B2 (en) | 2012-11-02 | 2015-10-27 | Mueller International, Llc | Coupling with extending parting line |
CN103724741A (en) * | 2013-12-16 | 2014-04-16 | 芜湖万润机械有限责任公司 | Compounded rubber seal pad material and preparation method thereof |
US11183795B2 (en) * | 2018-11-05 | 2021-11-23 | Alpha/Omega Energy Solutions, LLC | Three-phase electrical connector securing apparatus with flexible inserts |
US11421804B2 (en) | 2019-04-19 | 2022-08-23 | Aalberts integrated piping systems APAC, Inc. | Quick installation coupling |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US3999785A (en) | 1974-11-18 | 1976-12-28 | Victaulic Company Of Canada, Ltd. | Mechanical pipe outlet |
US4165892A (en) | 1977-08-12 | 1979-08-28 | Victaulic Company Of America | Coupling for releasably securing one end of a rod-like member |
US4561678A (en) | 1983-05-04 | 1985-12-31 | Victaulic Company Of America | Pipe coupling |
US4601495A (en) | 1982-04-23 | 1986-07-22 | Victaulic Company Of America | Pipeline system and method of assembly |
Family Cites Families (21)
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USRE23184E (en) | 1948-10-08 | 1949-12-20 | Precoated material and dry lubri | |
US3271308A (en) | 1960-05-17 | 1966-09-06 | Garlock Inc | Packing material and method and apparatus utilizing said packing material |
US3129812A (en) | 1961-04-17 | 1964-04-21 | Smith Blair Inc | Packaged flanged coupling adapter assembly |
CA882187A (en) * | 1968-03-13 | 1971-09-28 | Farbenfabriken Bayer Aktiengesellschaft | Thermoplastic-elastic moulding compounds |
US3785841A (en) | 1969-02-10 | 1974-01-15 | W Beard | Wax composition |
US3654744A (en) | 1969-12-30 | 1972-04-11 | Harry A Smith | Flexible skin package |
US4319924A (en) | 1974-02-12 | 1982-03-16 | Coatings For Industry, Inc. | Low-temperature curing coating composition |
US3941393A (en) * | 1974-03-15 | 1976-03-02 | Garlock Inc. | Seal method and article |
US4063640A (en) | 1977-03-09 | 1977-12-20 | Combustion And Controls Company, Inc. | Merchandise package |
US4381323A (en) | 1980-04-28 | 1983-04-26 | Coatings For Industry, Inc. | Low-temperature curing coating composition |
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JP3261767B2 (en) * | 1992-10-12 | 2002-03-04 | オイレス工業株式会社 | Spherical band-shaped seal body and method for producing the same |
US5342655A (en) | 1993-02-17 | 1994-08-30 | Ball Corporation | Solid film lubricant |
CA2147939C (en) | 1994-04-28 | 1999-07-06 | Elliott Y. Spearin | In-line application of solid lubricant to steel strip |
US5687974A (en) | 1996-03-15 | 1997-11-18 | Calconn, Inc. | Packing material having expanded graphite dispersed throughout |
US6164422A (en) * | 1996-11-15 | 2000-12-26 | Lucas Industries Public Limited Company | Method for assembling a disk brake with a lacquer-coated sealing ring and a disk brake assembly |
-
1999
- 1999-09-21 US US09/399,834 patent/US6371491B1/en not_active Expired - Fee Related
-
2000
- 2000-09-14 CN CN00813163A patent/CN1384906A/en active Pending
- 2000-09-14 AU AU74945/00A patent/AU756963B2/en not_active Ceased
- 2000-09-14 EP EP00963545A patent/EP1226380A2/en not_active Withdrawn
- 2000-09-14 PL PL00366133A patent/PL366133A1/en unknown
- 2000-09-14 WO PCT/US2000/025442 patent/WO2001021993A2/en not_active Application Discontinuation
- 2000-09-19 TW TW089119199A patent/TW521136B/en active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3999785A (en) | 1974-11-18 | 1976-12-28 | Victaulic Company Of Canada, Ltd. | Mechanical pipe outlet |
US4165892A (en) | 1977-08-12 | 1979-08-28 | Victaulic Company Of America | Coupling for releasably securing one end of a rod-like member |
US4601495A (en) | 1982-04-23 | 1986-07-22 | Victaulic Company Of America | Pipeline system and method of assembly |
US4561678A (en) | 1983-05-04 | 1985-12-31 | Victaulic Company Of America | Pipe coupling |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003029712A1 (en) * | 2001-09-28 | 2003-04-10 | Central Sprinkler Corporation | Ferrous pipe couplings and prelubricated coupling gaskets |
Also Published As
Publication number | Publication date |
---|---|
WO2001021993A3 (en) | 2001-10-04 |
TW521136B (en) | 2003-02-21 |
PL366133A1 (en) | 2005-01-24 |
EP1226380A2 (en) | 2002-07-31 |
AU756963B2 (en) | 2003-01-30 |
US6371491B1 (en) | 2002-04-16 |
CN1384906A (en) | 2002-12-11 |
AU7494500A (en) | 2001-04-24 |
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