WO2014118509A1 - Ensemble capuchon - Google Patents

Ensemble capuchon Download PDF

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Publication number
WO2014118509A1
WO2014118509A1 PCT/GB2014/050169 GB2014050169W WO2014118509A1 WO 2014118509 A1 WO2014118509 A1 WO 2014118509A1 GB 2014050169 W GB2014050169 W GB 2014050169W WO 2014118509 A1 WO2014118509 A1 WO 2014118509A1
Authority
WO
WIPO (PCT)
Prior art keywords
plunger
base
rim
cap assembly
cap
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.)
Ceased
Application number
PCT/GB2014/050169
Other languages
English (en)
Inventor
Richard DOBBIN
Darren Crew
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
Publication of WO2014118509A1 publication Critical patent/WO2014118509A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D45/00—Aircraft indicators or protectors not otherwise provided for
    • B64D45/02—Lightning protectors; Static dischargers
    • 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
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/14—Cap nuts; Nut caps or bolt caps

Definitions

  • the present invention relates to a cap assembly for forming a sealed cavity around one end of a fastener, a kit of parts for forming a cap assembly, a method of installing a cap assembly, and a joint formed using a cap assembly.
  • a known cap assembly for forming a sealed cavity around one end of a fastener is described in WO-A-2012/ 107741.
  • the assembly comprises an inner cap member with an annular base terminating at an edge which surrounds an opening into a central cavity, and an outer cap member which fits over the inner cap member.
  • the outer cap member has an annular base which forms an annular flange extending outwardly from the inner cap member at a point which is set back from the edge of the annular base of the inner cap member so as to define a pocket between the flange and the base.
  • a sealant material is provided between the inner plunger member and the outer plunger member. During installation the outer plunger member is pushed down so the sealant material flows into the pocket and adheres the cap to a structure.
  • the assembly has an outer cap filled partially with sealant, and an inner collet.
  • the outer cap engages the inner collet via a plurality of lock ribs, and the sealant extrudes between the cap and the collet via the gaps between the lock ribs.
  • a first aspect of the invention provides a cap assembly for forming a sealed cavity around one end of a fastener, the cap assembly comprising: a plunger with a body terminating at a plunger rim which surrounds a plunger opening, and a skirt extending outwardly from the body at a point which is set back from the plunger rim so as to define a pocket between the body and the skirt; and a base terminating at a base rim surrounds a base opening, wherein the plunger is fitted over the base and is slidably movable in an axial direction relative to the base, and wherein the plunger or the base comprises a cap with an end wall opposite the plunger opening or the base opening.
  • the body of the plunger has a collar (which is typically cylindrical) between the plunger rim and the point where the skirt extends outwardly from the body.
  • a pocket is defined between this collar of the body and the skirt.
  • the point which is set back from the plunger rim is set back in an axial outboard direction, that is a direction which is parallel with an axis of the cap assembly and directed from the opening into the cavity.
  • the base is partially received within the plunger and partially protrudes from the plunger opening so that the plunger rim is set back (again, in an axial outboard direction) from the base rim.
  • the plunger rim lies in a plane which is set back from a plane of the base rim.
  • the plunger may comprise a cap with an end wall opposite the plunger opening.
  • the base may also comprise a cap but more preferably it is open at both ends - that is the base has a second opening opposite the base opening.
  • the base may comprise a cap with an end wall opposite the base opening.
  • the plunger is preferably open at both ends - that is the plunger has a second opening opposite the plunger opening.
  • a bead of sealant material may be provided in the pocket, the sealant material preferably comprising a flowable material such as polysulphide.
  • the bead of sealant material may be contained entirely within the pocket or more preferably it protrudes from the pocket.
  • the skirt may extend from the body at right angles and then axially to form the pocket, but more preferably it is flared so that it extends at an acute angle to the body which is less than 90° but greater than 0°. Typically the acute angle is between 20° and 40°.
  • the pocket has a pocket opening defined by the plunger rim and a rim of the flange, and a surface area of the pocket is greater than an area of the pocket opening.
  • the plunger is axially slidably movable relative to the base from a first position to a second position (where the axial length of the cap assembly is typically reduced).
  • the end wall may completely close an outboard end of the cap, or it may have one or more small holes which allow air to escape as the plunger is moved to its second position.
  • the plunger may have a stop which engages the base when the outer plunger is in the second position.
  • the stop typically comprises a shoulder in an inner surface of the body of the plunger which extends around a circumference of the inner surface of the body of the plunger. This circumference may be circular or any other shape.
  • the stop may engage an outboard rim of the base, or the base may comprise an outer surface with a shoulder which extends around a circumference of the outer surface of the base and which engages the stop when the plunger is in the second position.
  • This circumference may be circular or any other shape.
  • the plunger rim may be set back from the base rim when the plunger is in the second position, or it may lie in the same plane as the base rim when the plunger is in the second position.
  • the plunger may engage the base via one or more annular recesses or protrusions.
  • the body of the plunger may have one or more recesses or protrusions which run around a circumference of the body, wherein the recess(es) or protrusion(s) lie in a plane which is substantially parallel with a plane of the plunger rim and can interlock with one or more corresponding protrusions or recesses in the base.
  • the recess(es) or protrusion(s) in the body of the plunger can interlock with the corresponding protrusion(s) or recess(es) in the base when the plunger is in the first position and/or in the second position.
  • the recess and protrusion ensure that the plane of the plunger rim remains aligned parallel with the plane of the base rim, and can be used to hold the plunger and base securely in place when the plunger is in the first or second position. Where they interlock in the second position, then they can interlock via a "snap-fit" connection which provides a tactile indication to a user that the plunger is in the second position.
  • the base has three or more protrusions which extend inwardly into an interior of the base and are spaced apart around a circumference of the interior of the base (which circumference may be circular or any other shape).
  • the body has an inner face and an outer face, and at least part of the inner face and/or the outer face of the body is substantially cylindrical.
  • the inner face and/or the outer face of the body may be substantially cylindrical in a collar of the body between the plunger rim and the point where the skirt extends outwardly from the body.
  • the plunger body may engage the base around a majority of its circumference.
  • the plunger body engages the base around a majority of its circumference when viewed in cross-section transverse to the axial direction.
  • Small gaps may be present (or in the case of the joint, regions of sealant which has flowed from the pocket during installation) but preferably the plunger body engages the base around its entire circumference when viewed in cross-section.
  • the plunger body and the base have inner and outer surfaces respectively which are in engagement and have substantially the same shape (for instance circular) around their full circumference when viewed in cross-section transverse to the axial direction.
  • the end wall has a domed shape.
  • the plunger rim may lie in the same plane as a rim of the skirt, or it may be set back from the rim of the skirt.
  • a further aspect of the invention provides a kit of parts according to claim 13 for forming a cap assembly according to the first aspect of the invention.
  • a further aspect of the invention provides a joint according to claim 14.
  • a further aspect of the invention provides a method of providing a sealed cavity around one end of a fastener according to claim 19.
  • alant material is adhered to the cap assembly via a first interface and to the structure via a second interface.
  • a surface area of the first interface is greater than a surface area of the second interface.
  • the first interface may consist of a plunger interface between the sealant and the plunger, with no interface between the sealant and the base.
  • the first interface may comprise a plunger interface between the sealant and the plunger and a base interface between the sealant and the base.
  • an adhesive strength of the first interface is greater than 100N and most preferably it is greater than 300N.
  • the base is partially received within the plunger cavity and partially protrudes from the end of the plunger cavity so that the plunger rim is set back axially from the base rim.
  • the plunger rim lies in a plane which is set back in an axial outboard direction from a plane of the base rim.
  • the skirt may have a skirt rim which is set back from the base rim.
  • the skirt rim typically lies in a plane which is set back in an axial outboard direction from a plane of the base rim.
  • the base is the cap
  • the plunger comprises an inboard plunger opening
  • the base comprises an inboard end including the base rim which protrudes from the inboard plunger opening
  • the plunger further comprises an outboard plunger opening opposite the inboard plunger opening.
  • the plunger is the cap, the plunger comprises an inboard plunger opening, the base comprises an inboard end including the base rim which protrudes from the inboard plunger opening, and the base further comprises an outboard base opening opposite the inboard base opening.
  • the base has three or more protrusions which extend inwardly into an interior of the base and are spaced apart around a circumference of the interior of the base.
  • the fastener is received within the base and engages the base, optionally via the three or more protrusions of the base which extend inwardly into the interior of the base and are spaced apart around its circumference.
  • the base rim engages the structure or the fastener.
  • the base rim engages the structure.
  • the end of the fastener may protrude from the structure, in which case the base rim surrounds the protruding end of the fastener.
  • the end of the fastener may lie flush with the structure or be countersunk within the structure, in which case the base rim surrounds the hole in the structure in which the fastener is countersunk.
  • the plunger does not engage the structure.
  • the plunger does not engage the fastener.
  • the cap assembly may be provided for the purpose of spark containment, for instance on an aircraft or a fuel tanker.
  • at least part of the structure through which the fastener passes typically comprises a composite material, and the fastener is electrically conductive.
  • the structure may comprise a pure composite material, or a hybrid composite/metal material.
  • the composite material is a laminar fibre- reinforced composite material, where the fibres are a conductive material such as carbon, and the matrix between the fibres has low conductivity.
  • the cap assembly may be used to seal the end of a fastener to prevent the ingress of a liquid (such as fuel). In this case the structure may not contain any composite material.
  • the structure typically comprises a pair of structural parts (for instance panels) which are joined together by the fastener.
  • the fastener may comprise a shaft with a head at one end; and a collar fitted to a second end of the shaft (the collar may for instance be a nut which is screwed onto the shaft, or a collar which is swaged onto the shaft).
  • the plunger may be used to form a sealed cavity at either the first or second end of such a fastener.
  • the end of the fastener may be housed within the cap assembly, or it may be countersunk within the structure (in which case the end of the fastener will lie outside the cap assembly).
  • FIG. 1 shows a kit of parts for forming a cap assembly
  • Figure 2 is a cross-sectional view of the cap assembly in a first installation state taken along a line B-B in Figure 3;
  • Figure 3 is a cross-sectional view of the cap assembly taken along a line A-A in Figure 2;
  • Figure 4 is a cross-sectional view of the cap assembly in a second installation state
  • Figure 5 is an enlarged cross-sectional view
  • Figure 6 is a cross-sectional view of a cap assembly according to a second embodiment of the invention in a first installation state taken along a line D-D in Figure 7;
  • Figure 7 is a cross-sectional view of the cap assembly taken along a line C-C in Figure 6;
  • Figure 8 is a cross-sectional view of the cap assembly in a second installation state; and Figure 9 is an enlarged cross-sectional view.
  • a kit of parts for forming a cap assembly is shown in Figure 1.
  • the kit comprises a plunger 1 and a base 2, each formed from a moulded polymer such as polyetherimide ULTEM 2400, or an epoxy.
  • the plunger 1 and the base 2 each have an inboard end and an outboard end (at the bottom and top respectively in the orientation of Figure 1).
  • the plunger 1 has a generally cylindrical body with an outboard part 4a and a collar 4b at its inboard end. Both parts 4a, 4b have substantially cylindrical inner and outer faces.
  • the collar 4b terminates at an annular plunger rim 5 at its inboard end which surrounds a circular plunger opening 6a into a plunger cavity 6.
  • a domed end wall 7 closes the plunger cavity 6 at its outboard end opposite the plunger opening 6a and plunger rim 5.
  • a frustoconical skirt or flange 8 extends outwardly from the outer face of the body at the junction between the parts 4a, 4b, at a point which is set back from the plunger rim 5 in the outboard direction.
  • An annular pocket or trough 9 is defined between the outer face of the collar 4b and the inner face of the skirt 8.
  • the pocket 9 has an annular opening 10 between the plunger rim 5 and a rim 11 of the skirt.
  • a surface area of the pocket 9 (given by the sum of the areas of the cylindrical outer face of the collar 4b and the frustoconical inner face of the skirt 8) is greater than the area of the pocket opening 10.
  • the inner face of the cap body is formed with an annular shoulder 12 running round its circumference.
  • the inner face of the cap body is also formed with series of annular ridges 13 running round its circumference as shown in Figure 2.
  • the shoulder 12 and ridges 13 all lie in planes which are substantially parallel with the plane of the plunger rim 5 and the skirt rim 11.
  • the plunger rim 5 lies in approximately the same plane as the skirt rim 11.
  • the base 2 has cylindrical inner and outer faces 20, 21, the inner face 20 being shown in Figure 3.
  • the base terminates at a circular inboard base rim 22 which surrounds an inboard base opening, and a circular outboard base rim 24 which surrounds an outboard base opening.
  • the base is open at both its inboard (lower) and outboard (upper) ends.
  • Six semi-cylindrical ridges or protrusions 25 extend inwardly from the inner face 20 of the base into its interior and are spaced apart equally around its circumference.
  • the ridges 25 run along the full axial length of the base.
  • the outer face 21 of the base has a series of annular grooves 26 shown in Figure 2 which lie substantially parallel to the planes of the base rims 22, 24 and match the pitch and shape of the ridges 13 in the plunger.
  • the plunger 1 Prior to installation on a fastener as shown in Figure 2, the plunger 1 is fitted over the base 2 to form a cap assembly shown in Figure 2.
  • the plunger and base are urged together until a number of the annular ridges 13 are received in corresponding annular grooves 26 as shown in Figure 2.
  • the ridges 13 and grooves 26 hold the plunger and base securely in place prior to installation and ensure that the plane of the plunger rim 5 remains aligned parallel with the plane of the base rim 22.
  • the base is partially received within the plunger cavity 6 and partially protrudes from the opening 6a at the inboard end of the plunger cavity so that the plunger rim 5 and skirt rim 11 are set back axially from the base rim 22 in the outboard direction by a distance Dl.
  • a band of poly sulphide sealant material 30 is installed in the pocket 9.
  • the sealant is extruded from a nozzle to apply a metered quantity into the pocket.
  • the nozzle and/or the cap assembly is moved so the sealant forms a bead around the full circumference of the pocket 9.
  • the bead over-fills the pocket so that part of the sealant material 30 fills the pocket and part protrudes from the opening 10 of the pocket as shown in Figure 2.
  • the sealant may be applied in a single pass around the pocket or as a series of layers laid down in a series of passes.
  • the nozzle may be angled at an acute angle to the plunger axis to ensure that sealant is fed all the way into the corner 31 of the pocket.
  • the sealant can be applied immediately prior to installation or could be supplied pre-installed in a frozen state.
  • the cap assembly is used to form a sealed cavity around a protruding end of a fastener assembly as shown in Figure 2.
  • the fastener assembly comprises a metal bolt 32 passing through a composite panel 34.
  • a washer 35 is fitted onto the protruding part of the bolt 32.
  • An internally threaded metal nut 33 is screwed onto the bolt 32 and compresses the washer 35 against the panel 34.
  • the washer 35 and nut 33 may have spherical surfaces as described in WO2012/107741 to enable the fastener to be fixed to the panel even though the bolt is not perpendicular to the panel.
  • the cap assembly is pushed onto the fastener until the inboard rim 22 of the base engages the panel 34.
  • the base 2 is sized so that the protrusions 25 engage the cylindrical outer surfaces of the nut 33 and washer 35 as a frictional or interference fit.
  • the protrusions 25 provide a standoff between the fastener and the inner face 20 of the base. They also grip the fastener so that the cap assembly is prevented from falling off under the action of gravity if the panel 34 is downward facing (that is, if the panel 34 is in the opposite orientation to Figure 2).
  • the plunger 1 is pushed inboard towards the panel 34 and slides axially relative to the base from the first position shown in Figure 2 until the shoulder 12 engages the outboard rim 24 of the base in a second position shown in Figure 4.
  • the rims 5, 11 are set back from the base rim by a distance Dl when the plunger is in the first n of Figure 2 and by a smaller distance D2 when the plunger is in the second position of Figure 4.
  • the skirt 8 of the sliding plunger 1 pushes the sealant 30 against the panel which then flows to form a seal against the panel as shown in Figure 4.
  • the inboard protruding part of the base 2 prevents the flowing sealant from flowing directly into the cavity 6 during this process.
  • only a relatively small amount of force is required to push the plunger 1 down from the first position of Figure 2 to the second position of Figure 4.
  • the sealant then cures and adheres the cap assembly to the panel 34.
  • the inner surface of the body of the plunger 1 and the outer surface 21 of the base are both circular when viewed in cross-section transverse to the axis of the cap assembly in the axial direction of motion of the plunger as it is pushed down. These two circular surfaces engage each other as a frictional fit (by way of the ridges 13 and protrusions 26) around substantially their full circumference without any large gaps.
  • both the inner surface of the body of the plunger 1 and the outer surface 21 of the base will be substantially the same shape in cross-section (circular in this case).
  • the outer surface 21 of the base will distort slightly from a circular cross-section to form a three-lobed shape (each lobe corresponding with a respective one of the protrusions 25).
  • the body of the plunger 1 is sufficiently flexible that it will also distort slightly so that its inner surface forms a similar three-lobed shape and continues to engage the outer surface 21 of the base around substantially its full circumference.
  • the plunger 1 moves from the first position of Figure 2 to the second position of Figure 4, it continues to engage the outer surface 21 of the base (by way of the ridges 13 and protrusions 26) around substantially its full circumference without any large gaps.
  • the absence of such large gaps prevents, or at least impedes, the flow of sealant into the sliding interface between the plunger and the base. If a small amount of sealant does flow into this sliding interface, then this may be beneficial since it creates an additional bond between the plunger and the base.
  • the undulating shape of the ;e created by the interlocking ridges 13 and grooves 26) will tend to prevent sealant from flowing all the way into the cavity 6.
  • the sealed cavity 6 provided by the cap assembly contains any sparking, plasma or out-gassing caused by a lightning strike.
  • the cap assembly may be immersed in fuel, in which case the sealant also prevents the ingress of fuel into the cavity.
  • Air from the plunger cavity 6 can escape as the plunger is pushed towards the panel by passing through the sliding interface between the base and the plunger and then through the interface between the sealant and the base.
  • a small hole may be provided in the apex 7a ( Figure 4) of the domed end wall 7 to allow this air to escape more easily.
  • This hole can be filled with polysulphide sealant or epoxy resin after installation to fully seal the cavity 6 around the fastener.
  • the panel may be flat as shown in Figure 1 or it may have raised features (not shown) on both sides, which may be for example fillets, ribs or spar flanges.
  • the rim of the skirt 8 is set back axially from the panel 34 and the base rim 22 by a distance D2 when the plunger is in the second position of Figure 4 and 5. This enables the plunger to be positioned close to such raised features.
  • the sealant material 30 is adhered to the cap assembly 1 ,2 via a first interface and to the panel 34 via a second interface as shown in Figure 5.
  • the first interface comprises a plunger interface between the sealant 30 and the plunger 1 and a base interface between the sealant 30 and the base 2.
  • a surface area of the first interface (given by the sum of the areas of the cylindrical outer face of the collar 4b, the frustoconical inner face 8a of the skirt 8, the annular rim 5, and the cylindrical outer face 21 of the base 2 between the plunger rim 5 and the base rim 22) is greater than a surface area of the second interface. This large surface area reduces the risk of adhesive failure at this first interface 4b, 8a, 5, 21.
  • the sealed cap assembly is pulled away from the panel 34, then failure will typically occur by adhesive failure at the first interface or by cohesive failure within the bead of sealant 30.
  • the strength of the adhesive bond is of the order of 400-500N at both the first and second interfaces.
  • the shoulder 12 in the plunger can be omitted so the plunger can be pushed all the way down to engage the panel 34.
  • this arrangement is less preferred because it reduces the area of the first interface and prevents the plunger from being positioned close to any raised features in the panel 34. It also prevents a seal being formed between the sealant and the base.
  • a cap assembly according to a second embodiment of the invention is shown in Figures 6-9.
  • the base is formed as a cap rather than the plunger.
  • the cap assembly is not shown as a kit of two parts, it can be provided as an unassembled kit as shown in Figure 1.
  • the cap assembly comprises a plunger 101 and a base 102, each formed from a moulded polymer such as polyetherimide ULTEM 2400, or an epoxy. Many parts of the plunger 101 and base 102 are similar to the first embodiment, so such similar parts will not be described again.
  • the plunger 101 has a body with an outboard part 104a and a collar 104b. Both parts 104a,104b have substantially cylindrical inner and outer faces.
  • the plunger 101 is open at both its inboard (lower) and outboard (upper) ends.
  • the rim 111 of the skirt 108 curves upwards at its end to form an outwardly extending flange.
  • the inner face of the plunger body is formed with an annular shoulder 112 running round its circumference towards its outboard end, and a single annular recess or groove 113 also running round its circumference, towards the inboard end of the collar 104b.
  • the shoulder 112 and recess 113 lie in planes which are substantially parallel to the planes of the rims 105, 111, 124.
  • the collar 104b is shorter than the axial extent of the skirt 108 so that the plunger rim 105 is set back axially in the outboard direction from the skirt rim 111.
  • the base 102 is a cap having a tubular body with cylindrical inner and outer faces 120, 121.
  • a domed end wall 117 closes the base cavity 106 at its outboard end opposite a base opening at the inboard end of the base.
  • Six cut-outs are formed in the inner face of the base, leaving six semi-cylindrical ridges or protrusions 125 extending inwardly from the inner face 120 of the base into the base cavity 106 and spaced apart equally around its circumference.
  • the outer face of the base is formed with an rd facing annular shoulder 127 running round its circumference, and a single annular ridge or protrusion 128 also running round its circumference, towards its inboard end.
  • the shoulder 127 and ridge 128 lie in planes which are substantially parallel to the plane of the base rim 122.
  • the base is partially received within the plunger and partially protrudes from the inboard end of the plunger by a distance D3.
  • a band of polysulphide sealant material 130 is installed in the pocket using a similar process to the one described above.
  • the plunger 101 is pushed inboard towards the panel and slides axially relative to the base from the first position shown in Figure 6 until the shoulder 112 of the plunger engages the shoulder 127 of the base in a second position shown in Figure 8, and the ridge 128 is received in the recess 113 as a snap fit as shown in Figure 9.
  • the ridge 128 and recess 113 ensure that the planes of the rims 122, 111, 105 remain parallel, and hold the plunger and base securely in place while the sealant cures. They also interlock via a "snap-fit" connection which provides a tactile indication to a user that the plunger is in the second position.
  • the plunger rim 105 is set back from the base rim in the outboard direction by a distance D3 when the plunger is in the first position of Figure 6 and by a smaller distance D5 when the plunger is in the second position of Figures 8 and 9.
  • the skirt 108 of the sliding plunger 101 pushes the sealant 130 which flows to form a seal against the panel as shown in Figures 8 and 9.
  • the protruding part of the base 102 prevents the flowing sealant from flowing into the base cavity 106 during this process.
  • the sealant then cures and adheres the cap assembly to the panel.
  • the plunger 101 moves from the first position of Figure 6 to the second position of Figure 8, it engages the outer surface 121 of the base around substantially its full circumference without any large gaps as shown in Figure 7.
  • the absence of such large gaps prevents, or at least impedes, the flow of sealant into this sliding interface between the plunger and the base.
  • n 111 of the skirt 108 is set back axially from the panel and from the base rim 122 by a distance D5 when the plunger is in the second position of Figure 9. This enables the plunger to be positioned close to any raised features.
  • the shoulders 112, 127 can be omitted so the plunger 101 can be pushed all the way down to engage the panel.
  • annular In all embodiments of the invention where various features are described as being annular, these parts are also circular. Note however that in the case of a non-circular (for instance square or hexagonal) cap assembly then these annular features will have a non-circular shape. Therefore the term "annular” is used herein to refer to a feature (for instance a shoulder, protrusion or recess) which runs round a circumference of the cap assembly regardless of the shape of that circumference.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Abstract

L'invention concerne un ensemble capuchon pour former une cavité étanche autour d'une première extrémité d'un organe de fixation. L'ensemble capuchon comporte un piston (1) ayant un corps (4a, 4b) se terminant à un bord (5) de piston qui entoure une ouverture (6a),de piston et une jupe (8) s'étendant vers l'extérieur du corps (4a, 4b) en un point qui est en retrait du bord (5) du piston de façon à définir une poche (9) entre le corps (4a, 4b) et la jupe (8). L'ensemble capuchon comprend également une base (2) se terminant à un bord (22) de ladite base, qui entoure une ouverture de base. Le piston (1) est monté sur la base (2) et peut coulisser par rapport à la base (2). La base (2) est partiellement reçue à l'intérieur du piston (1) et fait partiellement saillie de l'ouverture (6a) de piston de telle sorte que le bord (5) du piston est en retrait du bord (22) de la base. Un talon de produit d'étanchéité (30) est disposé dans la poche (9), le produit d'étanchéité (30) étant de préférence une matière fluide telle que du polysulfure. Le talon de produit d'étanchéité (30) peut être entièrement contenu à l'intérieur de la poche (9) ou, de préférence, faire saillie de la poche (9).
PCT/GB2014/050169 2013-01-31 2014-01-22 Ensemble capuchon Ceased WO2014118509A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1301703.3 2013-01-31
GB201301703A GB201301703D0 (en) 2013-01-31 2013-01-31 Cap Assembly

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Publication Number Publication Date
WO2014118509A1 true WO2014118509A1 (fr) 2014-08-07

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PCT/GB2014/050169 Ceased WO2014118509A1 (fr) 2013-01-31 2014-01-22 Ensemble capuchon

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GB (1) GB201301703D0 (fr)
WO (1) WO2014118509A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
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US9879711B2 (en) 2016-06-16 2018-01-30 Honda Motor Co., Ltd. Wheel bolt cap
CN111396439A (zh) * 2019-01-03 2020-07-10 波音公司 具有螺旋密封剂机构的eme保护盖系统
US20210048059A1 (en) * 2019-08-12 2021-02-18 Asyst Technologies L.L.C. Injectable cap assembly and method of use
US20210071704A1 (en) * 2019-09-11 2021-03-11 Pf Waterworks Lp Toilet Bolt Cap
US11254443B2 (en) * 2017-11-29 2022-02-22 Airbus Operations Limited Spark containment cap

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EP0040667A1 (fr) * 1980-05-27 1981-12-02 Trailer Marine Transport Corporation Calotte de sécurité pour pneu
GB2163817A (en) * 1984-08-29 1986-03-05 Rockwell International Corp Fastener seal assembly
US4659273A (en) * 1985-11-08 1987-04-21 Trailer Marine Transport Lug attachment
DE8906253U1 (de) * 1989-05-20 1989-08-17 Warema Renkhoff Gmbh & Co Kg, 8772 Marktheidenfeld Einrichtung zum in Querrichtung nachgiebigen Befestigen eines ebenen oder gewölbten plattenförmigen Bauteils auf einer festen Unterlage
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WO2009063063A1 (fr) * 2007-11-15 2009-05-22 Airbus España S.L. Dispositif de protection contre les décharges électriques dans des éléments de fixation à charges élevées
EP2551187A1 (fr) * 2010-03-23 2013-01-30 Mitsubishi Heavy Industries, Ltd. Bouchon, structure fixée utilisant celui-ci et avion doté de ladite structure fixée

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Publication number Priority date Publication date Assignee Title
US9879711B2 (en) 2016-06-16 2018-01-30 Honda Motor Co., Ltd. Wheel bolt cap
US11254443B2 (en) * 2017-11-29 2022-02-22 Airbus Operations Limited Spark containment cap
US12060162B2 (en) 2017-11-29 2024-08-13 Airbus Operations Limited Spark containment cap
CN111396439A (zh) * 2019-01-03 2020-07-10 波音公司 具有螺旋密封剂机构的eme保护盖系统
CN111396439B (zh) * 2019-01-03 2024-01-02 波音公司 具有螺旋密封剂机构的eme保护盖系统
US20210048059A1 (en) * 2019-08-12 2021-02-18 Asyst Technologies L.L.C. Injectable cap assembly and method of use
US20210071704A1 (en) * 2019-09-11 2021-03-11 Pf Waterworks Lp Toilet Bolt Cap

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