US20100221064A1 - Fastener joint with sealing gasket - Google Patents

Fastener joint with sealing gasket Download PDF

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Publication number
US20100221064A1
US20100221064A1 US12/680,911 US68091108A US2010221064A1 US 20100221064 A1 US20100221064 A1 US 20100221064A1 US 68091108 A US68091108 A US 68091108A US 2010221064 A1 US2010221064 A1 US 2010221064A1
Authority
US
United States
Prior art keywords
gasket
fastener
component
head
shaft
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.)
Abandoned
Application number
US12/680,911
Other languages
English (en)
Inventor
Colin John WEST
David Alistair SUTTON
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Airbus Operations Ltd
Original Assignee
Airbus Operations Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Airbus Operations Ltd filed Critical Airbus Operations Ltd
Assigned to AIRBUS UK LIMITED reassignment AIRBUS UK LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SUTTON, DAVID ALISTAIR, WEST, COLIN JOHN
Publication of US20100221064A1 publication Critical patent/US20100221064A1/en
Abandoned legal-status Critical Current

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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
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/008—Bolts without screw-thread; Pins, including deformable elements; Rivets with 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
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00—Features common to bolt and nut
    • F16B33/004—Sealing; 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
    • F16J15/14—Sealings between relatively-stationary surfaces by means of granular or plastic material, or fluid
    • 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
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/60—Coupler sealing means
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49947—Assembling or joining by applying separate fastener

Definitions

  • the present invention relates to a joint with a sealing gasket, a gasket for use in such a joint, and a method of manufacturing such a joint.
  • EP 1548083 A1 describes a sealing material for use in sealing joints.
  • the sealing material comprises an at least partially cured polysulphide sealant and a reinforcing element.
  • the sealing material is provided in the form of a sheet of uniform thickness. The sheet is placed between the mating surfaces of the components in the manner of a gasket, and the components are then fastened together, for example with rivets or bolts.
  • U.S. Pat. No. 3,022,870 describes a fastener joint with a self-sustaining adherent polysulphide film forming a fluid-tight seal between a pair of metal plates.
  • a first aspect of the invention provides a joint comprising: a first component having a face and a bore defined by a bore wall; a second component; a fastener joining the first component to the second component, the fastener comprising a head and a shaft protruding from the head; and a polysulphide gasket comprising a ring which is compressed between the head of the fastener and the face of the first component; and a collar between the shaft of the fastener and the bore wall.
  • a second aspect of the invention provides a method of manufacturing a joint, the method comprising:
  • the gasket of the present invention forms a collar between the shaft of the fastener and the bore wall.
  • the collar of the gasket engages both the shaft of the fastener and the bore wall.
  • the collar of the gasket forms a bond with the shaft of the fastener and/or the bore wall.
  • the ring forms a bond with the head of the fastener and the face of the first component.
  • the head of the fastener may comprise a non-tapered button-head, or more preferably the bore comprises a tapered opening and the head of the fastener comprises a tapered head which is received in the tapered opening.
  • the gasket may be un-reinforced, or more preferably the gasket further comprises a reinforcing element such as a fabric.
  • the gasket comprises a matrix-rich region which contains a lower than average density of reinforcement, for instance on an outer surface of the gasket.
  • Any suitable reinforcing material may be used, for example glass, carbon, aramid, metal (especially stainless steel) or polyamide.
  • the current solution for sealing and protecting structure from lightning strike is to prevent air voids by using wet assembled sealed joints and to provide a low impedance path between two surfaces or parts, usually through the use of bonding leads.
  • bonding leads can fail (break) creating a spark hazard, which is unacceptable particularly in areas of the aircraft containing fuel vapour.
  • a large space envelope is required to install and maintain bonding leads.
  • the polysulphide material forming the gasket may be loaded with conductive particles.
  • the gasket will provide an element of protection from lightning strike by forming an electrical path between the components without air voids.
  • the conductive particles may comprise carbon black or metals such as silver. However carbon black may not be sufficiently conductive and silver will reduce the mechanical properties of the polysulphide, especially when at higher concentrations. Therefore most preferably the conductive particles are carbon nanotubes.
  • the reinforcing material may also be formed by a conductive fabric, such as metal, for purposes of lightning protection.
  • the gasket may have a region of increased thickness towards its inner periphery. This region may extend only partly round the circumference of the ring (for instance in a series of discrete locations) or may extend around the entire circumference of the ring. Typically the region of increased thickness includes a matrix-rich protrusion which contains a lower than average density of reinforcement.
  • a further aspect of the invention provides a gasket for sealing a fastener joint, the gasket comprising a ring of sealing material surrounding a hole for receiving a fastener, the sealing material comprising an at least partially cured polysulphide sealant with a region of increased thickness positioned towards the inner periphery of the ring.
  • the gasket is specially adapted for use in the first and second aspects of the invention, since the region of increased thickness provides the necessary material to flow along the shaft of the fastener.
  • FIG. 1 is a plan view of a gasket
  • FIG. 2 is a cross-section through the gasket
  • FIG. 3 is an enlarged cross-section through part of the gasket
  • FIG. 4 is a cross-sectional view of a joint on an aircaft, before the sealant material has flowed along the shaft of the bolt;
  • FIG. 5 shows the bolt being pushed into the joint
  • FIG. 6 shows the joint after the sealant material has flowed along the shaft of the bolt.
  • a gasket 1 shown in FIGS. 1-3 comprises a ring of sealing material with an outer periphery 2 , and an inner periphery 3 surrounding a hole 4 .
  • the sealing material comprising an at least partially cured polysulphide sealant 5 , and a layer of fabric reinforcement 6 shown in cross-section in FIGS. 2 and 3 .
  • the gasket has a ring-shaped protrusion 7 which is positioned towards the inner periphery 3 of the ring, and extends around the entire circumference of the ring as shown in FIG. 1 .
  • the protrusion 7 contains substantially none of the reinforcing fabric as shown in FIGS. 2 and 3 .
  • the gasket is manufactured by the following process.
  • a paste of polysulphide material is mixed with a curing agent such as manganese dioxide.
  • a curing agent such as manganese dioxide.
  • a curing agent such as manganese dioxide.
  • suitable sealant materials are described in EP 1548083 A1, the contents of which is incorporated herein by reference.
  • the material may comprise Chemetall MC238-A1/2 or PRC-De Soto International PR1770C12.
  • the paste of polysulphide material may be filled with conductive particles, most preferably carbon nanotubes, for purposes of lightning protection.
  • a woven cloth of glass-fibre is then impregnated with the polysulphide sealant by a conventional calendering process.
  • the calendering process produces matrix-rich regions 8 , 9 shown in FIG. 3 .
  • the sheet is stamped to cut out the ring-shaped profile of the gasket which is placed between a pair of mould tools shaped to give the required shape to the protrusion 7 .
  • the ring is compressed between the mould tools and heated to a lightly raised temperature (no greater than 60° C.) to fully or partially cure the polysulphide material. Completion of the curing process may occur before or after assembly of the joint.
  • FIGS. 4-6 A method of sealing a fastener joint with the gasket 1 is shown in FIGS. 4-6 .
  • the gasket 1 is mounted on the tapered head 10 of a bolt.
  • the shaft 11 of the bolt is then passed through a pair of components 12 , 13 as shown in FIG. 4 , and a nut 14 is screwed onto the threaded distal end 15 of the shaft 11 .
  • the gasket engages a tapered opening 16 in the first component 12 as shown in FIG. 5 .
  • the gasket is un-deformed.
  • the gasket 1 becomes compressed between the tapered head 10 of the bolt and the wall of the tapered opening 16 .
  • this pressure causes the polysulphide sealing material in the matrix-rich regions 8 , 9 and the protrusion 7 to flow along the shaft 11 of the fastener to form a cylindrical collar 18 between the shaft 11 and the wall of the cylindrical bore 19 in the first component 12 as shown in the left-hand side FIG. 6 .
  • the right-hand side of FIG. 6 shows the gasket in its un-flowed state, for comparison purposes.
  • gaskets formed with polytetrafluoroethylene (PTFE) which tend to flow outwardly instead of flowing along the shaft 11 .
  • the sealing material may flow as far as the second component 13 . After a period of time, the sealing material bonds to the opposing surfaces of the tapered head 10 , tapered opening 16 , shaft 11 and the wall of the cylindrical bore 19 to form a fluid-tight seal.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gasket Seals (AREA)
US12/680,911 2007-10-23 2008-10-20 Fastener joint with sealing gasket Abandoned US20100221064A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0720705.3 2007-10-23
GBGB0720705.3A GB0720705D0 (en) 2007-10-23 2007-10-23 Fastener joint with sealing gasket
PCT/GB2008/050968 WO2009053734A1 (fr) 2007-10-23 2008-10-20 Joint de fixation avec garniture d'étanchéité

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2008/050968 A-371-Of-International WO2009053734A1 (fr) 2007-10-23 2008-10-20 Joint de fixation avec garniture d'étanchéité

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/744,054 Division US9568035B2 (en) 2007-10-23 2013-01-17 Fastener joint with sealing gasket

Publications (1)

Publication Number Publication Date
US20100221064A1 true US20100221064A1 (en) 2010-09-02

Family

ID=38829735

Family Applications (3)

Application Number Title Priority Date Filing Date
US12/680,911 Abandoned US20100221064A1 (en) 2007-10-23 2008-10-20 Fastener joint with sealing gasket
US13/744,054 Expired - Fee Related US9568035B2 (en) 2007-10-23 2013-01-17 Fastener joint with sealing gasket
US13/744,017 Abandoned US20130125374A1 (en) 2007-10-23 2013-01-17 Fastener joint with sealing gasket

Family Applications After (2)

Application Number Title Priority Date Filing Date
US13/744,054 Expired - Fee Related US9568035B2 (en) 2007-10-23 2013-01-17 Fastener joint with sealing gasket
US13/744,017 Abandoned US20130125374A1 (en) 2007-10-23 2013-01-17 Fastener joint with sealing gasket

Country Status (5)

Country Link
US (3) US20100221064A1 (fr)
EP (1) EP2201272B1 (fr)
AT (1) ATE524679T1 (fr)
GB (1) GB0720705D0 (fr)
WO (1) WO2009053734A1 (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100253014A1 (en) * 2003-12-23 2010-10-07 West Colin John Method of sealing a joint
US20130056937A1 (en) * 2010-04-28 2013-03-07 Markus Watermann Sealing Collar
WO2013039890A1 (fr) * 2011-09-16 2013-03-21 Prc-Desoto International, Inc. Compositions de matériau conducteur d'étanchéité
WO2014148963A1 (fr) * 2013-03-22 2014-09-25 Saab Ab Procédé pour assembler une première structure composite à au moins une seconde structure, et liaison mécanique et/ou électrique
US20160039465A1 (en) * 2014-08-05 2016-02-11 Magna Steyr Fahrzeugtechnik Ag & Co Kg Method of manufactoring a vehicle and vehicle
US20160045879A1 (en) * 2013-03-27 2016-02-18 University Of Washington Through Its Center For Commercialization Dynamic seal to enable movement of a film or fiber through a pressurized space while maintaining a desired pressure
USD753274S1 (en) * 2015-03-11 2016-04-05 Garlock Sealing Technologies, Llc Gasket having raised sealing surface pattern
USD753275S1 (en) * 2015-03-11 2016-04-05 Garlock Sealing Technologies, Llc Gasket having raised sealing surface pattern
USD759219S1 (en) * 2015-03-11 2016-06-14 Garlock Sealing Technologies, Llc Gasket having raised sealing surface pattern
USD759217S1 (en) * 2015-03-11 2016-06-14 Garlock Sealing Technologies, Llc Gasket having raised sealing surface pattern
USD758728S1 (en) * 2015-03-11 2016-06-14 Garlock Sealing Technologies, Llc Gasket having raised sealing surface pattern
USD759218S1 (en) * 2015-03-11 2016-06-14 Garlock Sealing Technologies, Llc Gasket having raised sealing surface pattern
US10428860B2 (en) 2015-03-18 2019-10-01 Airbus Operations Limited Self-sealing fixing element
US20210355984A1 (en) * 2016-12-15 2021-11-18 SR Systems, LLC Self-sealing fastener and method of use
US11346387B2 (en) * 2018-04-18 2022-05-31 Textron Innovations, Inc. Integral sealant O-ring
CN115255732A (zh) * 2022-08-03 2022-11-01 山东美生热能科技有限公司 一种新型隔热油套管的真空密封装置

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US10281043B2 (en) 2015-07-10 2019-05-07 Lockheed Martin Corporation Carbon nanotube based thermal gasket for space vehicles
US20180172045A1 (en) * 2016-12-17 2018-06-21 Ford Global Technologies, Llc Friction Element Weld Element Modification To Increase Corrosion Resistance of Thermal Mechanical Joint
US11299654B2 (en) 2019-08-20 2022-04-12 Roller Bearing Company Of America, Inc. Permanent, self-adhering, self-lubricating, anti-wear composite system
CN113399199B (zh) * 2021-06-23 2022-10-25 成都飞机工业（集团）有限责任公司 一种螺母罩封系统及方法
SE2330386A1 (en) * 2022-09-12 2024-03-13 Reidar Hagner Self-Sealing Mounting and Fastening Element

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US2718691A (en) * 1951-01-17 1955-09-27 Presstite Engineering Company Method of sealing
US2853330A (en) * 1956-08-13 1958-09-23 Henry A Harry Multi-ribbed sealing strip
US3022870A (en) * 1957-03-18 1962-02-27 Minnesota Mining & Mfg Adherent sealer film
US3247752A (en) * 1963-12-10 1966-04-26 L J Barwood Mfg Co Inc Sealing or cushion fastener
US3494243A (en) * 1967-06-28 1970-02-10 Standard Pressed Steel Co Sealing fastener
US3659896A (en) * 1970-03-17 1972-05-02 Thiokol Chemical Corp Adhesive semi-cured sealing strip for automobile windshield
US3837657A (en) * 1971-12-22 1974-09-24 Farnam F Co Beaded gasket and method of using same
US3936059A (en) * 1973-10-03 1976-02-03 Federal-Mogul Corporation Sealing boundary gasket for compression between flanged portions of two mating metal members
US4070219A (en) * 1974-08-12 1978-01-24 F. D. Farnam Co. Method of making densified convolute gasket structure
US5390939A (en) * 1983-12-16 1995-02-21 C. I. Kasei Co., Ltd. Joint sealing member
US4810454A (en) * 1986-06-18 1989-03-07 Dana Corporation Method of manufacturing a gasket having multiple regions of different densities and thicknesses
US5141375A (en) * 1990-11-30 1992-08-25 Nylok Fastener Corporation Self-sealing threaded fastener
US5639103A (en) * 1991-09-13 1997-06-17 Meillor S.A. Flat gasket, in particular for an internal combustion engine and related manufacturing method
US6626439B1 (en) * 1997-08-29 2003-09-30 Interface Solutions, Inc. Edge coated gaskets and method of making same
US6530575B2 (en) * 1997-09-09 2003-03-11 Federal Mogul Sealing Systems Static sealing joint
US20030015278A1 (en) * 1999-04-20 2003-01-23 Bae Systems Plc Method of sealing a panel to an aircraft structure
US20020010223A1 (en) * 1999-10-20 2002-01-24 Alexander Botrie Polymeric foam gaskets and seals
US7063327B2 (en) * 2002-10-11 2006-06-20 Federal Mogul Sealing Systems Bretten Gmbh & Co.Kg Sealing element
US7425604B2 (en) * 2003-04-30 2008-09-16 Ppg Industries Ohio, Inc. Preformed EMI/RFI shielding compositions in shaped form
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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100253014A1 (en) * 2003-12-23 2010-10-07 West Colin John Method of sealing a joint
US20130056937A1 (en) * 2010-04-28 2013-03-07 Markus Watermann Sealing Collar
WO2013039890A1 (fr) * 2011-09-16 2013-03-21 Prc-Desoto International, Inc. Compositions de matériau conducteur d'étanchéité
CN103814085A (zh) * 2011-09-16 2014-05-21 Prc-迪索托国际公司 导电性密封剂组合物
WO2014148963A1 (fr) * 2013-03-22 2014-09-25 Saab Ab Procédé pour assembler une première structure composite à au moins une seconde structure, et liaison mécanique et/ou électrique
US20160045879A1 (en) * 2013-03-27 2016-02-18 University Of Washington Through Its Center For Commercialization Dynamic seal to enable movement of a film or fiber through a pressurized space while maintaining a desired pressure
US9937475B2 (en) * 2013-03-27 2018-04-10 University Of Washington Through Its Center For Commercialization Dynamic seal to enable movement of a film or fiber through a pressurized space while maintaining a desired pressure
US9669879B2 (en) * 2014-08-05 2017-06-06 Magna Steyr Fahrzeugtechnik Ag & Co Kg Method of manufacturing a vehicle and vehicle
US20160039465A1 (en) * 2014-08-05 2016-02-11 Magna Steyr Fahrzeugtechnik Ag & Co Kg Method of manufactoring a vehicle and vehicle
USD753275S1 (en) * 2015-03-11 2016-04-05 Garlock Sealing Technologies, Llc Gasket having raised sealing surface pattern
USD759217S1 (en) * 2015-03-11 2016-06-14 Garlock Sealing Technologies, Llc Gasket having raised sealing surface pattern
USD758728S1 (en) * 2015-03-11 2016-06-14 Garlock Sealing Technologies, Llc Gasket having raised sealing surface pattern
USD759218S1 (en) * 2015-03-11 2016-06-14 Garlock Sealing Technologies, Llc Gasket having raised sealing surface pattern
USD759219S1 (en) * 2015-03-11 2016-06-14 Garlock Sealing Technologies, Llc Gasket having raised sealing surface pattern
USD753274S1 (en) * 2015-03-11 2016-04-05 Garlock Sealing Technologies, Llc Gasket having raised sealing surface pattern
US10428860B2 (en) 2015-03-18 2019-10-01 Airbus Operations Limited Self-sealing fixing element
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GB0720705D0 (en) 2007-12-05
US20130125375A1 (en) 2013-05-23
EP2201272A1 (fr) 2010-06-30
US20130125374A1 (en) 2013-05-23
ATE524679T1 (de) 2011-09-15
EP2201272B1 (fr) 2011-09-14
US9568035B2 (en) 2017-02-14
WO2009053734A1 (fr) 2009-04-30

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