GB2419167A - Expandable fastener forming fluid tight seal - Google Patents
Expandable fastener forming fluid tight seal Download PDFInfo
- Publication number
- GB2419167A GB2419167A GB0423083A GB0423083A GB2419167A GB 2419167 A GB2419167 A GB 2419167A GB 0423083 A GB0423083 A GB 0423083A GB 0423083 A GB0423083 A GB 0423083A GB 2419167 A GB2419167 A GB 2419167A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sleeve
- end portion
- fastener according
- axially segmented
- screw
- 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.)
- Withdrawn
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 21
- 239000000565 sealant Substances 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 210000002445 nipple Anatomy 0.000 claims description 19
- 239000004519 grease Substances 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 244000025254 Cannabis sativa Species 0.000 claims description 7
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 7
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 7
- 235000009120 camo Nutrition 0.000 claims description 7
- 235000005607 chanvre indien Nutrition 0.000 claims description 7
- 239000011487 hemp Substances 0.000 claims description 7
- 230000004323 axial length Effects 0.000 claims description 6
- 229910000760 Hardened steel Inorganic materials 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 241000543375 Sideroxylon Species 0.000 claims 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims 1
- 239000011780 sodium chloride Substances 0.000 claims 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000003345 natural gas Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 241000937413 Axia Species 0.000 description 1
- 208000003643 Callosities Diseases 0.000 description 1
- 206010020649 Hyperkeratosis Diseases 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/02—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose in one piece with protrusions or ridges on the shaft
-
- 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
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/041—Specially-shaped shafts
-
- 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
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
-
- 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
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/023—Locking of screws, bolts or nuts in which the locking takes place after screwing down by driving a conic or wedge-shaped expander through the threaded element
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
An expandable fastener includes a hollow sleeve (102 - see figure 2) having a screw threaded end (106 - see figure 2) to receive a nut (109 - see figure 2) and an axially segmented end (105 - see figure 2). An expansion rod (112) is inserted along the hollow sleeve (102) to cause the segmented end (105) to expand. Means (117) are provided to supply a settable liquid sealant from the screw threaded end (105), the sealant forming a fluid tight seal between the fastener and an aperture the fastener engages with.
Description
TITLE
EXPANDABLE FASTENER FORMING FLUID TIGHT SEAL
DESCRIPTION
Technical Field
The invention relates to expandable fasteners that join components together and form a fluid-tight seal between the fastened components and the fastener. More particularly, the invention relates to fasteners having a hollow sleeve, with an axially segrne'1ted end, through which gettable liquid sealant can be supplied to the axially segmented end, which on setting forms the fluid-tight seal.
Background art
Many existing fluid storage vessels, such as natural gas storage towers for storing' natural gas, were built using metal plates that were riveted together with meta] rivets.
Usually the rivets were iron rivets. The tight fit between the exterior surface of the rivet and the metal plates meant that little or no fluid could escape from the interior of the storage vessel to the exterior of the storage vessel through the rivet holes.
.:.20 . With the passage of time, the rivets have corroded so that fluid now leaks from the . interior of the storage vessel along the path of the rivets. To repair the fluid storage vessels, each faulty rivet must be replaced. To replace the rivet with another fastener, a: it is necessary to have access to both the interior and the exterior of the storage vessel at the location of the faulty rivet. Currently, this is achieved by cutting an entrance postal into the storage vessel through the metal plates. This is exceedingly dangerous in the case of natural gas storage towers, because the storage vessel can still be holding natural gas, which is inflarnn1able. It is an object of this invention to provide a fastener that requires access from the outside of a fluid storage vessel only.
After cutting the entrance portal, the head of the faulty rivet on the interior of the vessel is removed and the rivet is pushed out from the inside. A standard bolt which has been adapted is used to replace the faulty rivet. The standard bolt has been adapted as follows. A blindended bore has been drilled into the end of the standard bolt distal fion the head end. The bore extends along the axial length of the bolt but terminates short of the head end. A passageway is drilled radially inwardly at the end of the bore through the wall of the bolt. A sealant fluid is later supplied to the bore, and flows along the bore and out through the passageway to surround a part of the bolt before setting to form a fluid-tight seal between the bolt and the metal plates.
To join the plates together, two washers are first placed over the adapted bolt. The washers are a first hemp washer and a first metal washer. The adapted bolt is tlJen threaded through the apertures in the plates from the inside, so that the screw-threaded end protrudes outside the storage vessel. The first hemp washer dies adjacent the metal plate. Then, a second hen1p washer and a second metal washer are placed over the screw-tleaded end. A nut is screwed on the screw-threaded end, and tightened to a - 2 desired torque. This requires access to both ends of the adapted bolt. Finally, sealant fluid is supplied to the bore from the screw-threaded end as described above.
It is an object of this invention to provide a fastener that can form a fluid tight seal and fasten components together where access is restricted. It is a further object of this invention to provide a fastener that is safer and cheaper to use.
Summary of invention
The present invention provides a fastener as set forth in claim 1.
Fluid means a material in any phase that has the properties of a fluid.
The expansion rod's axial length may be substantially equal to or less than the length of the axially segmented end portion of the sleeve. Thus when the expansion rod has caused maximum expansion of the axially segmented end portion, the entire length of the expansion rod is contained within the axially segmented end portion and a gap exists linking the hollow interior of the sleeve with the spaces between axial segments.
.:. 20 em. The diameter of the expansion rod may be substantially equal to the diameter of the . hollow interior of the sleeve in the zone from the screw-threaded end portion to the step. Thus the expansion rod will readily pass along the zone to the step, whereupon : lo: contacting the step it will force the axial segments outwardly.
The expansion rod may have an inwardly tapering leading end, to facilitate passage of the leading end past the step within the hollow sleeve. aces
The external screw thread on the hollow sleeve may extend from the screw threaded end portion partially onto the axially segmented end portion. Part of the screw thread will thus overlap with part of the spaces between the axial segments. The troughs of the screw thread may offer an easier flow path for the liquid sealant to flow along.
The axially segmented end portion of the sleeve may be formed by at least two radial slots extending axially from an end of the sleeve to terminate at the end of the axially segmented end portion, each slot having a terminal end, the slots being circumferential]y spaced around the axially segmented end. Preferably three or four radial slots are used.
IThe tip of at least one axia] slot may be widened to provide a widened chancel for the gettable liquid sealant to flow through.
The means for supplying the settab]e liquid sealant may comprise a one way grease nipple removably connected to the screw threaded end portion, so that when collected to the sleeve, the interior of the hollow sleeve is in fluid communication with the other side of the grease nipple through the grease nipple only.
An internal screw thread may be provided within the bore of the hollow sleeve at the screw-threaded end portion, and the grease nipple may be screwed into the internal screw thread.
The fastener may further comprise a cap to seal the screw-threaded end of the hollow sleeve after the gettable sealant has set and after the means for providing the gettable liquid sealant has been removed.
The fastener may further comprise a metal washer placed over the sleeve before the nut is screwed onto the external screw thread.
The fastener may further comprise a hemp washer for absorbing excess sealant placed over the sleeve before the metal washer is placed over the sleeve.
The fastener may further comprise a setting tool to fully drive the expansion rod along the hollow sleeve, the setting tool comprising a hardened steel rod having two end portions, one end portion having a large diameter and the other end portion having a narrower diameter, the narrower diameter portion being of substantially the same diameter as the expansion rod and having an axial length sufficient to drive the :.. 20 expansion rod along the length of the sleeve until the trailing end of the expansion rod has passed into the axially segmented end portion of the sleeve. Thus the setting rod I. will drive the expansion rod down the hollow sleeve and position it in exactly the right place within the sleeve. .e .
The hollow interior of the sleeve may have a larger diameter section and a narrower diameter section, the narrower diameter section being located within the axially segmented end and separated from the larger diameter section by the step. i...
The step within the hollow sleeve may comprise a tapered section. au
The fastener according to the invention may be used in a method comprising the following steps: optionally removing any existing fasteners joining the components together; screwing the nut onto the screw-threaded end portion of the sleeve; positioning the sleeve through the aligned apertures in the components to be joined together so that the axially segmented end portion protrudes from the far side of the components to be joined together and the nut abuts against the near side of the components; driving the expansion rod down the hollow interior of the sleeve to expand the axially segmented end portion radially outwardly; tightening the nut to a required torque; attaching the grrcase nipple to the screw-threaded end portion; supplying the gettable liquid sealant Lough the grease nipple so that the sealant flows along the hollow interior of the sleeve, and therefrom radially outwardly to surround part of the sleeve and set, so as to Corns the fluid-tight seal; removing the grease nipple; and applying a sealing cap to the screw-threaded end portion of the sleeve to close the interior.
Dlagrams Figure I shows a drawing of a prior art fastener in use; Figure 2 shows an unexpanded sleeve, nut and expansion rod of the fastener according to the invention; Figure 3 shows an expanded sleeve according to the invention; Figure 4 shows an embodiment of the fastener according to the invention in use; Figure 5 shows an embodiment of the fastener according to the invention in use, iT1 which the tip of at least one axial slot has been widened; and Figure 6 shows the setting tool of the invention in use to drive an expansion rod along the sleeve of a fastener according to the invention.
: . 20 ë It will be understood that the drawings are schematic only. ëe.
With reference to Figure 1, a bolt I with a head 2 is shown joining components S Ale. together through aligned apertures. Tile faulty rivet (not shown) has been removed prior to the installation of the bolt 1. The bolt has been inserted front the interior (on the left of Figure]) of a storage vessel so that its screw-threaded end protrudes froth the exterior of the fluid storage vessel (on the right). The bolt was modified prior to 8. insertion; a bore 3 was drilled up froth the screw-threaded end towards the head end 2 but tenninating short of the head end 2, and a passageway 4 was drilled radially 30 inwardly through the wall of the bolt to join the bore 3.
The bolt 2 is inserted through a metal washer 6 and a hemp washer 7, before being inserted through the aligned apertures in the components S. A hemp washer 7 and a metal washer 6 are placed over the screw-threaded end, and a nut is screwed on said end and tightened to the desired torque. The nut 2 is held immobile throughout.
Finally, sealant is supplied to the bore 3 from the screw-threaded end, and flows up through the bore 3 and out through the passageway 4, before flowing around the circumference of the bolt in the region of the passageway and setting to forte a sea].
Figure 2 shows an embodiment of the fastener 10] according to the invention. A hollow sleeve 102 has a hollow interior 103. The sleeve 102 has a screw-threaded end portion 106 and an axially segmented end portion 105. The sleeve 102 is substantially CYIindriCaI. A step 104 is located in the hollow interior 103 of the sleeve, and is situated within the axially segmented end portion 105. An expansion rod 112 for insertion and subsequent driving along the hollow interior 103 is provided. The expansion rod has a leading end 113 with a taper 114 and a trailing end 11S. In use (Figures 3-6), the leading end is inserted into the hollow interior of the sleeve 102 from the screw-threaded end portion, and is driven along the interior 103 in the direction of the axially segmented end portion 105. The axially segmented end portion of the sleeve is formed by cutting at least two axial slots 108, one of which Is shown in Figure 2 axially along sleeve to divide that end into segments.
The sleeve 1()2 has an external screw thread which extends over the screwthreaded end portion 106 and overlaps with the tip of the axial slot 108. A nut 109 can be screwed onto the external screw thread 109.
Figure 3 shows how the expansion rod 112 can cause radial expansion of the axially segmented end portion 105. The rod 112 is driven along the sleeve by an applied force, for example using the setting tool 123 (Figure 6), until the leading end comes into contact with the step 104 within the sleeve 102. The step has a narrower diameter than the diameter of the interior of the sleeve in the zone from the screw threaded end portion to the step. Further driving the rod along the sleeve forces the leading end through and past the step] 04, which forces the segments outwardly. After the applied force is removed, the expansion rod is held in place by friction. In Figure 3, the segments have reached their maximtm expansion, and the rod 1]2 is in its correct position, fully contained within the axially segmented end portion. The slightly : . 20 shorter axial length of the rod 112 compared to the axially segmented end portion means that the trailing end of the rod is fully within the axially segmented end . portion, and that there is a gap linking the hollow interior of the sleeve with the spaces between acijacent axial segments through which fluid can flow. .
Figure 4 shows an cmbodinent of the fastener in use to replace a corroded rivet in a gas storage vessel. The rivet has already been removed. The sleeve 102 has been inserted through the aligned holes, and a hemp washer 122, metal washer 121 and a nut 109 screwed on to the screw-threaded end 106. The expansion rod has been driven along the sleeve and expanded the segmented end. The position and length of the rod 30 Is such that after expansion of the segments a gap exists at the trailing end 115 of the expansion rod, which connects the hollow interior 103 of the sleeve 102 with the axial slots 108. In the embodiment shown, the length of the expansion rod 112 is such that it is contained completely within the axially segmented end portion 105. After the rod has been driven to its correct position, a grease nipple mount 116 is removably screwed into an internal screw thread 110 in the hollow interior of the sleeve at the screw-threaded end portion. The grrease nipple mount 116 temporarily seals the hollow interior, so that the hollow interior is only in fluid communication with the other side of the grrease mpple mount via a one-way grease nipple 1 17.
Settahle liquid sealant (not shown) is supplied to the grrease nipple 117, and flows along the hollow Ulterior 103 and out though the gap, to surround the sleeve in the region of the gap. The liquid sealant sets rapidly in the presence of the fluid within the storage vessel to form a fluid-tigllt seal.
After the liquid has set, the grease nipple mount 116 is removed and a cap (not shown) Is fitted over the open screw tl-eaded end to close tle interior 103. - 6
Figure 5 shows another embodiment of the fastener according to the invention, in which the tip of at least one axial slot 108 has been widened to provide an easier flow path for the liquid sealant. This may be combined with narrower slots]08 to limit liquid sealant flow into the interior of the storage vessel and aid fluid flow out through the gaps between segments to fill any voids between the sleeve and apertures. A fluid tight seal (not shown) forms rapidly around the sleeve 102 to sea] off the interior of the storage vessel 126 from the outside enviromnent 127.
Figure 6 shows a setting tool 123 according to the invention in use, to drive an expansion rod 112 along a hollow sleeve. The setting tool 123 has a smaller diameter portion and a larger diameter portion 125. The setting tool is made of hardened steel.
The smaller diameter portion 124 contacts the trailing end 115 of the rod 112, and drives the rod 112 along the sleeve when a force is applied to the larger diameter portion 125 of the setting tool. The length of the smaller diameter portion 124 is designed to precisely position the rod 112 within the sleeve. The larger diameter portion 125's diameter is larger than the diameter of the hollow interior 103, so that the rod] 12 is precisely positioned when the shoulder between the larger diameter portion 125 and the smaller diameter portion 124 impacts the screw- threaded end of the sleeve preventing further movement of the setting tool 123.
: em. 20 I:.
I - 7
Claims (1)
- CLAII\4S 1. An expandable fastener for fastening together components andproviding a fluid-tight seal between the fastened components and the fastener, comprising a hit anchor in which a hollow sleeve is extemal]y screw- threaded at least at one end portion and receives a nut thereon, and is axially segmented at the other end portion, with a step in the hollow interior of the sleeve within the axially segmented end portion, and in which an expansion rod is drivable down the hollow interior of the sleeve from the screw-threaded end portion after inserting the hollow sleeve through aligned apertures in the components to be fastened, until a leading end of the expansion rod contacts and passes the step in the hollow interior of the sleeve, and forces apart the segments to create a rivet head to secure the hollow sleeve against removal from the aligned apertures in the direction of the nut, characterized in that the expansion rod is of a length such that by the time its leading end has forced the segments Bully apart, its trailing end has passed into the axially segmented end portion of the sleeve; and means are provided for supplying a gettable liquid sealant from the screw-threaded end portion of the sleeve after the expansion rod has forced the segments fully apart, so that the liquid sealant flows through the spacesbetween adjacent axial se=nents and fills any voids between the hit anchor and the aligned apertures through which the hit anchor passes. I..:..CLME: 25 2. A fastener according to claim 1, wherein the expansion rod's axial length is substantially equal to or less than the length of the axially segmented end portion of the sleeve. a.3. A fastener according Lo claim 1 or 2, wherein the diameter of the expansion " " 30 rod is substantially equal to the diameter of the hollow interior of the sleeve in the zone from the screw-threaded end portion to the step.4. A fastener according to claim 3, wherein the expansion rod has an inwardly tapering leading end.5. A fastener according to any preceding claim, wherein the external screw thread on the hollow sleeve extends from the screw threaded end portion partially onto the axially segmented end portion.6. A fastener according to any preceding claim, wherein the axially segmented end portion of the sleeve is Conned by two radial slots extending axially from an end of the sleeve to terminate at the end of the axially segmented end portion, each slot having a terminal end, the slots being circumferentially spaced around the axially segmented end.7. A fastener according to any preceding claim, wherein the axially segmented end portion of the sleeve is formed by three radial slots extending axially fi-om an end of the sleeve to terminate at the end of the axially segmented end portion, each slot having a terminal end, the slots being circumferentia]]y spaced around the axially segmented end.8. A fastener according to any preceding claim, wherein the axially segmented end portion of the sleeve is Conned by four radia] slots extending axially from an end of the sleeve to terminate at the end of the axially segmented end portion, each slot having a terminal end, the slots being circumferentially spaced around the axially segmented end 9. A fastener according to any of claims 6 to 8, wherein the tip of at least one aria] slot is widened to provide a widened channel for the gettable liquid sealant to flew through.l 0. A fastener according to any preceding claim, wherein the means for supplying the gettable liquid sealant comprises a one way grease nipple removably comlected to the screw threaded end portion, so that when connected to the sleeve, the interior of the hollow sleeve is in fluid communication with the other side of the grease nipple through the grrease nipple only. . 20I 1. A fastener according to claim 10, wherein an internal screw thread is provided . within the bore of the hollow sleeve at the screw-threaded end portion, and tile grrease nipple is screwed into the internal screw thread. ë25]2. A fastener according to any preceding claim, further comprising a cap to seal the screw-threaded end of the hollow sleeve after the gettable sealant has set and after the means for providing the gettable liquid sealant has been removed. me13. A fastener according to any preceding claim, further comprising a metal : : flu washer placed over the sleeve before the nut Is screwed onto the external screw thread.14. A fastener according to claim]3, further comprising a hemp washer for absorbing excess sealant placed over the sleeve before the metal washer is placed over the sleeve.IS. A fastener according to any preceding claim, further comprising a setting tool to fully drive the expansion rod along the hollow sleeve, the setting tool comprising a hardened steel rod having two end portions, one end portion having a large diameter and the other end portion having a narrower diameter, the narrower diameter portion being of substantially the saline diameter as the expansion rod and having an axial length sufficient to drive the expansion rod along the length of the sleeve until the trailing end of the expansion rod leas passed into the axially segmented end pOtOTl of the sleeve.OK - 9 -16. A fastener according to any preceding claim, wherein the hollow interior of the sleeve has a larger diameter section and a narrower diameter section, the narrower diameter section being located within the axially segmented end and separated from the larger diameter section by the step.17. A fastener according to any preceding claim, wherein the step comprises a tapered section.18. A method of using the fastener according to any preceding claim, comprising the following steps: optionally removing any existing fasteners joining the components together; screwing the nut onto the screw-threaded end portion of the sleeve; positioning the sleeve through the aligned apertures in the components to be joined together so that the axially segmented end portion protrudes from the far side of the components to be joined together and the nut abuts against the near side of the components; driving the expansion rod down the hollow interior of the sleeve to expand the axially segmented end portion radially outwardly; . 20 tightening the nut to a required torque; . attaching the grease nipple to the screw-threaded end portion; supplying the gettable liquid sealant through the grease nipple so that the sealant flows along the hollow interior of the sleeve, and therefrom radially outwardly to surround part of the sleeve and set, so as to form the 25 fluid-tight seal; removing the grease nipple; and applying a sealing cap to the screw-threaded end portion of the sleeve : .. . to close the interior . : .: 30 19. A fastener as described harem with reference to the drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0423083A GB2419167A (en) | 2004-10-18 | 2004-10-18 | Expandable fastener forming fluid tight seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0423083A GB2419167A (en) | 2004-10-18 | 2004-10-18 | Expandable fastener forming fluid tight seal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0423083D0 GB0423083D0 (en) | 2004-11-17 |
| GB2419167A true GB2419167A (en) | 2006-04-19 |
Family
ID=33462901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0423083A Withdrawn GB2419167A (en) | 2004-10-18 | 2004-10-18 | Expandable fastener forming fluid tight seal |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2419167A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2383475A3 (en) * | 2010-03-22 | 2012-02-22 | HILTI Aktiengesellschaft | Attachment device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043541B (en) * | 2019-05-07 | 2024-05-17 | 哈尔滨工程大学 | Bolt device for expanding and damping cylinder body |
| CN112879403A (en) * | 2021-01-25 | 2021-06-01 | 谢亚洲 | Non-woven fabric roll mounting mechanism of mask machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0178405A1 (en) * | 1984-10-10 | 1986-04-23 | Fischerwerke Arthur Fischer GmbH & Co. KG | Plastic dowel, in particular for fastenings at moist room gypsum plaster walls provided with tiles |
| US20040109738A1 (en) * | 2001-08-15 | 2004-06-10 | Ducker Andrew L. | Sealable fastener with sealant delivery passageway to circumferential sealant channel and method |
-
2004
- 2004-10-18 GB GB0423083A patent/GB2419167A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0178405A1 (en) * | 1984-10-10 | 1986-04-23 | Fischerwerke Arthur Fischer GmbH & Co. KG | Plastic dowel, in particular for fastenings at moist room gypsum plaster walls provided with tiles |
| US20040109738A1 (en) * | 2001-08-15 | 2004-06-10 | Ducker Andrew L. | Sealable fastener with sealant delivery passageway to circumferential sealant channel and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2383475A3 (en) * | 2010-03-22 | 2012-02-22 | HILTI Aktiengesellschaft | Attachment device |
| EP2420713A1 (en) * | 2010-03-22 | 2012-02-22 | HILTI Aktiengesellschaft | Device for tensioning objects |
| EP2372174A3 (en) * | 2010-03-22 | 2012-08-29 | HILTI Aktiengesellschaft | Device and method for fixing and device for generating strokes |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0423083D0 (en) | 2004-11-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |