GB2163823A - Self-plugging blind rivet - Google Patents
Self-plugging blind rivet Download PDFInfo
- Publication number
- GB2163823A GB2163823A GB08422036A GB8422036A GB2163823A GB 2163823 A GB2163823 A GB 2163823A GB 08422036 A GB08422036 A GB 08422036A GB 8422036 A GB8422036 A GB 8422036A GB 2163823 A GB2163823 A GB 2163823A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stem
- shank
- rivet
- tail
- plug
- 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- Withdrawn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
- 230000000694 effects Effects 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 2
- 239000004800 polyvinyl chloride Substances 0.000 claims description 2
- 239000004677 Nylon Substances 0.000 claims 1
- 229920001778 nylon Polymers 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 abstract 1
- 239000004033 plastic Substances 0.000 abstract 1
- 230000000750 progressive effect Effects 0.000 description 4
- 230000004323 axial length Effects 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 3
- 239000013536 elastomeric material Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/04—Rivets; Spigots or the like fastened by riveting
- F16B19/08—Hollow rivets; Multi-part rivets
- F16B19/10—Hollow rivets; Multi-part rivets fastened by expanding mechanically
- F16B19/1027—Multi-part rivets
- F16B19/1036—Blind rivets
- F16B19/1045—Blind rivets fastened by a pull - mandrel or the like
- F16B19/1054—Blind rivets fastened by a pull - mandrel or the like the pull-mandrel or the like being frangible
-
- 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
Abstract
In order to effect sealing in a self-plugging blind rivet comprising a headed sleeve 12 and a headed pulling pin 10, an annular plastics seal 11 is seated in a groove 50 formed between the pin head 28 and a pin shoulder 48, the seal 11 being kept compressed by the internal surface of the sleeve 12 prior to use, to keep pin and sleeve together. When the rivet is set by pulling the pin 10, the tapered end of the sleeve bulges outwards to form the blind head, and bulges inwards to further compress the seal 11 and to abut against the pin shoulder 48 to retain the broken-off pin 10 in sleeve 12. The inner surface of the tapered end of the sleeve need not be tapered; compression of the seal 11 may be by a flange extending inwardly from the inner surface, or by increasing the external diameter of the seal 11. <IMAGE>
Description
SPECIFICATION
Self-plugging blind rivet
This invention relates to a self-plugging blind rivet, and more particularly to such a rivet having means for rendering the rivet, when set, impervious to liquids.
Self-plugging blind rivets are well known, and generally comprise a tubular rivet body having an elongate, generally cylindrical shank and a radially enlarged preformed rivet head at one end of the shank and a bore which extends through the head and shank, and an elongate stem which, in a rivetsetting operation, can be pulled so as to deform the shank of the body and thereby form a blind head, at least part of the stem being retained as a plug within the bore of the body of the set rivet.
We have found that, despite the retention of a plug within the bore of the set rivet, water and other fluids are sometimes able to percolate through the bore, passing between the plug and the surrounding shank.
We have now devised a self-plugging blind rivet incorporating means which, in the set rivet, serves to form a water-tight seal between the rivet body and the plug, and thus renders the set rivet substantially impervious.
According to the present invention, there is provided a self-plugging blind rivet comprising a tubular rivet body, an elongate stem and an annular seal of resiliently deformable material, the body having an elongate shank, a radial enlargement providing a rivet head at one end of the shank, a tail end at the other end of the shank, and a bore extending axially through the rivet head and the shank to the tail end, the stem extending through the bore of the body and comprising a stem-tail which projects from the head end of the body, and a plug connected to the stem-tail, the plug having a generally cylindrical first part adjacent to the stem-tail, a second part which is spaced from the stem-tail by the first part, and a radially enlarged terminal head at the end of the stem remote from the stem-tail, the terminal head presenting an underhead surface which faces towards the stem-tail for abutting the tail end of the shank, and the diameter of the plug in the second part being reduced to provide an annular groove adjacent to the terminal head and an abutment which faces generally towards the terminal head, the said annular seal being seated in the annular groove and extending circumferentially of the plug, the shank of the body having a main portion adjacent to the rivet head, and an end portion spaced from the rivet head by the main portion, the internal surface of the end portion compressively engaging the outer peripheral surface of the annular seal so as to resist separation of the body from the stem and seal prior to use, the external diameter of the end portion of the shank reducing progressively in a direction away from the main portion and towards the tail end to a diameter at the tail end less than that of the main portion and not appreciably greater than that of the terminal head of the plug,
so that a compressive force sufficient to set the
rivet will, when exerted on the shank by pulling the
stem tail, cause the shank to bulge at a position spaced from the tail end thus forming a blind
head, and will cause material at the tail end to enter the annular groove thus further compressing the annular seal between the body and the plug and providing means on the body for abutting the abutment of the plug so as to retain the plug within the body of the set rivet.
The diameter of the bore in the end portion of the shank may reduce towards the tail end.
The bore may be tapered towards the tail end.
The bore may be stepped down to a smaller diameter towards the tail end.
The shank may have a radially inwardly extending annular part which enters the annular groove and compressively engages the annular seal.
The bore may be a parallel bore throughout the rivet head and the main portion of the shank.
The annular seal may be a tubular cylinder.
The annular seal may be axially located between the abutment and the underhead surface of the terminal head of the plug.
Embodiments of the invention will now be described, by way of example, with reference to the accompanying diagrammatic drawings, in which:
Figure 1 is a partly sectional elevation showing a self-plugging breakstem blind rivet according to the invention and a workpiece comprising three apertured members which are to be fastened together by means of the rivet;
Figure 2 is a view similar to Figure 1, including a fragmentary sectional elevation of a rivet-setting tool and showing an early stage in the setting of the rivet;
Figure 3 is a view similar to Figure 2 but showing a later stage in the setting of the rivet, and
Figure 4 is a view similar to Figure 3 but showing the rivet after being fully set in the workpiece.
Referring first to Figure 1 of the drawings, a selfplugging blind rivet comprises an elongate stem 10, an annular seal 11, and a tubular body 12 which, prior to use of the rivet are assembled together to form a unitary structure.
The body comprises an elongate shank 14 of circular cross section and a radially enlarged preformed rivet head 16 at one end of the shank. A bore 18 extends axially through the rivet head 16 and shank 14 to the end of the shank remote from the rivet head 16, which end is indicated by the reference 20 and is hereinafter referred to as the "tail-end".
The stem comprises an elongate stem-tail 22, a plug 24 which is joined to the stem-tail by a narrow breakneck 26, and a radially enlarged terminal head 28 at the end of the plug (and hence also at the end of the stem) which is remote from the stem-tail 22. The terminal head 28 has an underhead surface 30 which faces generally towards the stem-tail 22. In this embodiment the terminal head is undercut, which is to say that the underhead surface 30 is recessed so as to present a surface which, at the periphery of the head, is slightly nearer to the stem-tail 22 than is the radially inner part of the underhead surface.
The narrow breakneck is made the weakest part of the stem 10 so that when the stem is subjected to axial tension it will break at the breakneck rather than elsewhere.
The plug 24 comprises a general cylindrical first part 36 adjacent to the breakneck and a second part 38 in which the diameter is reduced, as compared with the first part. The first part 36 comprises two adjacent zones, namely a splined zone 40 immediately adjacent to the breakneck 26, and a swageing zone 42 spaced from the breakneck by the splined zone. The swageing zone 42 has a plain cylindrical surface and a diameter greater than that of the stem-tail 22. The splined zone 40 is formed with a plurality of circumferentially spaced splines 44 which extend longitudinally of the stem and project radially outwardly.It will of course be appreciated that the diameter of the splined zone varies between a maximum and a minimum according to whether it is measured through or between the splines, but, taken at the maximum, that is, across a circle on which the radially outermost parts of the splines lie, the diameter of the splined zone is substantially the same as that of the swageing zone 42 so that, overall, the first part 36 of the plug is generally cylindrical.
In the second part 38 of the plug of this embodiment, the diameter of the plug reduces progressively from that of the first part 36 in the direction towards the terminal head 28. More particularly, the reduction in diameter is effected in two stages, there being an initial reduction providing a step 46 immediately adjacent to the first part 36 of the plug, and a further reduction at a position intermediate between the terminal head and the first part 36 of the plug, the further reduction providing an annular abutment 48 which faces generally towards the terminal head, and an annular groove 50 between the abutment and the terminal head.
The purpose of the annular abutment is to cooperate with a part of the rivet body after the rivet has been set, so as to assist retention of the plug within the body. For this reason the further reduction is made as abrupt as possible. We believe that, ideally, the abutment 48 should extend radially at right angles to the axis of the stem but, having regard to the practical difficulties of manufacturing stems, some departure from this ideal can be tolerated without great disadvantage.
The initial reduction 46 is not required to provide an abutment and does not behave as an abutment, but is provided for the purpose of contributing to the progressive reduction of the diameter of the second part of the plug so that the diameter reduces more gradually than would be the case with a single abrupt reduction alone. While the initial reduction could be provided by a taper, we find it convenient to make the initial reduction stepwise.
The annular groove 50 has a cylindrical root, and a width, between the abutment 48 and the underhead surface 30, which is substantially the same as, or slightly greater than, the wall thickness at the tail-end of the shank 14 of the rivet body. The annular seal 11 of this embodiment is formed as a tubular cylinder of an elastomeric material, in this embodiment plasticised polyvinyl chloride, and is disposed in the annular groove 50 of the plug 24 so as to extend circumferentially around the plug at the root of the groove. The internal diameter of the seal is made the same as or slightly less than the diameter of the plug at the root of the groove.
The axial length of the seal is substantially the same as the width of the groove, and the wall thickness of the seal is slightly greater than the depth of the groove so that the external surface of the seal in its undeformed state is slightly above the level of the adjacent part of initially reduced di a meter.
As the seal is formed of an elastomeric material, it is possible to tolerate a slight over- or undersize in the dimensions of the seal 11 relative to those of the groove 50.
The seal 11 is assembled with the stem 10 before the body and stem are assembled, preferably by stretching and threading it over the stem-tail and plug until it comes to lie in the annular groove 50 where it is able then to recover elastically to its original dimensions and become seated at the root of the groove. The stem, with the seal in position, is then assembled with the rivet body 12, the stemtail being inserted into the bore 18 at the tail-end 20 of the body and passed through the bore until the underhead surface 30 of the terminal head 28 abuts the tail-end 20 of the body, and the stem-tail 22 projects from the end of the body having the rivet head 16.
The shank 14 of the rivet body falls into two distinct portions, namely an externally cylindrical main portion 54 adjacent to the rivet head 16, and a tapering end portion 32 spaced from the rivet head by the main portion and which extends to the tail-end 20.
The external diameter of the end portion 32 reduces progressively in the direction away from the main portion and towards the tail-end from a diameter the same as that of the main portion to a smaller diameter at the tail-end which is slightly less than that of the terminal head of the plug, so that its external surface makes a distinct angle with the external surface of the main portion.
The axial length of the end portion is greater than the width of the annular groove 50 of the plug and corresponds generally in length to that of the second part 38 of the plug.
The diameter of the bore of the body is smaller at the tail-end 20 than that of the outer peripheral surface of the annular seal 11 so that, in the assembled rivet, the body engages and grips the elastomeric seal, compressing it radially inwardly.
In this embodiment, the diameter of the bore within the end portion 32 reduces progressively away from that within the main portion of the shank to a diameter at the tail-end 20 which is less than that of the initially reduced diameter part of the plug adjacent to the annular groove, so that part of the body adjacent the tail-end 20 not only compresses the elastomeric seal but enters into the groove between the abutment and the terminal head. The progressive reduction in diameter of the bore within the end portion can be effected conveniently by starting with a body in which the bore is constant in the end portion, and then crimping the end portion after assembling the body with the stem and seal so as to impose a constriction on the end portion which progressively increases towards the tail-end.The progressive reduction can thus be made to correspond generally to that of the second part of the plug, and the progressive reduction in the external diameter of the end portion can also be produced simultaneously in a similar manner.
The fact that the seal 11 is positively located in the groove 50 between the terminal head and the abutment 48 and that the body compressively engages the periphery of the seal assists in retaining the stem and seal within the body of the assembled rivet. In addition, however, the fact that part of the body adjacent the tail end actually enters between the abutment 48 and the terminal head 28 serves further to ensure that the stem and body do not become disassembled when being manipulated prior to use of the rivet.
The bore within the head and main portion of the rivet body 12 is generally parallel but has a locking region 56 in the vicinity of the rivet head
16, in which region the diameter of the bore is reduced to a diameter corresponding to or only slightly greater than the minimum diameter of the splined zone of the plug. The axial length of the
locking region 56 is slightly greater than that of the splined zone 40 of the plug. The body has a short counterbore 58 at the head end of the bore, the counterbore having substantially the same diameter as the main part of the bore 18 which extends from the locking region 56 as far as the tapered end portion 32.
In the unset rivet, the stem-tail 22 extends with clearance through the locking region 56. The first
part 36 of the plug is disposed in the main part of the bore 18 between the locking region 56 and the
end portion 32, and the first part 36 is of such a
maximum diameter as to be a clearance fit in the
main part of the bore and such as to be an interference fit in the locking region 56. In conse
quence, when the stem is pulled to set the rivet,
causing the splined zone 40 of the plug to be
drawn into the locking zone, the splines 44 cut or
swage their way into the material of the body pe
ripherally of the locking zone, forming in the mate
rial of the body longitudinal grooves and
complementary splines which interengage the
locking zone by projecting between the splines 44
of the plug.Subsequently, the plain cylindrical further zone 42 may enter the locking zone, swageing
the complementary splines of the body back into
the longitudinal grooves and thereby closing the
grooves behind the splines 44. The inter-engage
ment between the splined zone 40 of the plug and
the longitudinal grooves and complementary spli
nes in the locking region 56 of the body serves, in
the set rivet, to prevent rotation of the plug relative
to the body, and the closing of the longitudinal
grooves behind the splines will tend to lock the
plug in the body and thus prevent withdrawal of the plug from the tail-end of the body.
An example of the use of the rivet of the invention will now be described. In this example, the self-plugging blind rivet is used to fasten together three apertured members which are assembled together, with their apertures aligned, to form a workpiece 60. The workpiece 60 has a front side 62 which is accessible to an operator, and a rear or "blind" side 64 which need not be accessible. The aligned apertures extend from the front side to the blind side.
In order to ensure that fluids will not be able to pass through the apertures by passing between the rivet and the workpiece, an annular washer 66 of elastomeric material is disposed on the shank of the body adjacent the rivet head 16 so as to be compressed into sealing relationship between the head 16 and the workpiece 60 when the rivet is set.
The assembled rivet is inserted into the aligned apertures so that the washer 66 abuts the front side of the workpiece and lies between the workpiece and the rivet head 16, and the shank 14 extends through the workpiece, and the terminal head of the stem, the tapered end portion and part of the main portion 54 of the shank project beyond the blind side as shown in Figure 1. The stem-tail 22, which is formed with a plurality of annular pulling grooves 68, is then gripped and pulled by means of a tool having means for gripping the grooved stem-tail 22 and an annular anvil 70 (shown in Figure 2) for abutting the rivet head 22 and through which the stem-tail is inserted into engagement with the gripping means.
The tool is then operated to pull the stem axially relative to the body in a direction to draw the terminal head 28 of the stem towards the rivet head 16 while the body is supported by the anvil. At this point, it is appropriate to mention that the stem is formed of a hard material, resistant to deformation although designed to break at the breakneck when subjected to a predetermined high tensile stress, and in this embodiment is formed of very hard toughened steel, and the body is formed of a relatively soft deformable material, for example aluminium alloy or, as in this embodiment, alloy steel.
Due to the abutting of the tail-end 20 of the shank by the underhead surface 30 of the terminal head, the operation of the tool subjects the shank
14 to compressive stress, and in consequence the projecting part of the shank begins to deform, forming an outward circumferential bulge 72 between the blind face of the workpiece and the ter
minal head, and at the same time, the part of the shank within the workpiece expands radially to fill the apertures, as can be seen in Figure 2. More
particularly, the bulge 72 is centred at a position
lying between the ends of the tapered end portion 32 but spaced from the tail end 20 of the shank so that the inwardly extending part 34 remains located in the annular groove 29.
As the pulling of the stem progresses, the spli
ned zone 40 of the plug enters and passes along the locking region 56 as previously discussed, and the bulge 72 begins to engage the blind side of the workpiece around the apertures, and thus consti tute a blind head. At the same time, the end portion 32 begins to be thrown into a fold. The effect of this folding is to drive part of the end portion which is between the fold and the tail end 20 more fully into the annular groove 50. This tends to cause some of the material of the annular seal to be displaced out of the groove so that it tends to flow into a void created between the bulging part of the shank and the plug, as can be seen in Figure 3.
With continued pulling of the stem, the folding of the shank material between the terminal head and the workpiece becomes more acute so that the resultant blind head abuts a substantial area of the blind side of the workpiece peripherally of the aperture, and the folding parts of the shank close up, compressing the material of the seal in the void and forcing it into intimate contact with the plug.
Eventually, the plain cylindrical further zone 42 begins to enter the locking region of the bore and this, together with increasing resistance to further deformation of the body in the region of the blind head, results in the fact that the tension required to pull the stem further exceeds the tension which the breakneck can withstand, and consequently the stem breaks at the breakneck, allowing the tool to be removed and the stem-tail to be discarded, leaving the rivet fully set in the workpiece with the members of the workpiece tightly clamped between the rivet head and the blind head, as shown in Figure 4.
By reason of the progressively reducing external diameter of the end portion of the shank of the body, the compressive force which is applied to the tail-end of the shank by the terminal head on pulling the stem is transmitted through the tapering end portion in a direction towards the rivet head but inclining outwardly at an angle to the longitudinal axis of the shank.
This results in the generation of forces which promote the formation of a bulb-like circumferential bulge in the shank at a position spaced from the tail-end 20, and which drive the tail-end of the shank further into the groove so that the annular seal is firmly compressed between the body and the plug and thus forms a barrier to the passage of fluid between the body and plug.
Although in the foregoing embodiment the external surface of the end portion 32 of the shank is circular in cross-section, this is not essential, provided it is generally tapered towards the tail-end 20. Thus, for example, the end portion could be formed as a frustum of a pyramid so as to be polygonal in cross-section, or the end portion could be of generally circular cross-section but formed with a plurality of circumferentially spaced ribs extending in the longitudinal direction of the shank.
It is not essential for the diameter of the bore within the end portion to reduce progressively, or at all, towards the tail end 20 since it is not essential for the end portion of the body to enter the annual groove 50 in order to retain the stem and seal within the body. Thus, for example, the diameter of the bore could be constant throughout the end portion and could be the same as that in the main portion of the shank. However it will be appreciated that, if the body is to be capable of retaining the stem and seal so as to enable the assembled rivet to be manipulated without risk of the parts becoming separated prior to use of the rivet, then it is necessary for the body to engage either the stem or the annular seal in such a way as to prevent them becoming separated. This can be achieved by, for example, providing the body with a radially inwardly extending annular flange at the tail-end so as to compressively engage the seal, or by increasing the external diameter of the seal so that it will necessarily be compressively engaged by the internal surface of the end portion.
Claims (1)
1. A self-plugging blind rivet comprising a tubular rivet body, an elongate stem and an annular seal of resiliently deformable material, the body having an elongate shank, a radial enlargement providing a rivet head at one end of the shank, a tail end at the other end of the shank, and a bore extending axially through the rivet head and the shank to the tail end, the stem extending through the bore of the body and comprising a stem-tail which projects from the head end of the body, and a plug connected to the stem-tail, the plug having a generally cylindrical first part adjacent to the stem-tail, a second part which is spaced from the stem-tail by the first part, and a radially enlarged terminal head at the end of the stem remote from the stem-tail, the terminal head presenting an underhead surface which faces towards the stem-tail for abutting the tail end of the shank, and the diameter of the plug in the second part being reduced to provide an annular groove adjacent to the terminal head and an abutment which faces generally towards the terminal head, the said annular seal being seated in the annular groove and extending circumferentially of the plug, the shank of the body having a main portion adjacent to the rivet head, and an end portion spaced from the rivet head by the main portion, the internal surface of the end portion compressively engaging the outer peripheral surface of the annular seal so as to resist separation of the body from the stem and seal prior to use, the external diameter of the end portion of the shank reducing progressively in a direction away from the main portion and towards the tail end to a diameter at the tail end less than that of the terminal head of the plug, so that a compressive force sufficient to set the rivet will, when exerted on the shank by pulling the stem tail, cause the shank to bulge at a position spaced from the tail end thus forming a blind head, and will cause material at the tail end to enter the annular groove thus further compressing the annular seal between the body and the plug and providing means on the body for abutting the abutment of the plug so as to retain the plug within the body of the set rivet.
2. A self-plugging blind rivet as claimed in claim 1, wherein the diameter of the bore in the end portion of the shank reduces towards the tail end.
3. A self-plugging blind rivet as claimed in either of claims 1 or 2, wherein the bore is tapered towards the tail end.
4. A self-plugging blind rivet as claimed in either of the claims 1 or 2, wherein the bore is stepped down to a smaller diameter towards the tail end.
5. A self-plugging blind rivet as claimed in any preceding claim, wherein the shank has a radially inwardly extending annular part which enters the annular groove and compressively engages the annular seal.
6. A self-plugging blind rivet as claimed in any preceding claim, wherein the bore is parallel throughout the rivet head and the main portion of the shank.
7. A self-plugging blind rivet as claimed in any preceding claim, wherein the annular seal is a tubular cylinder.
8. A self-plugging blind rivet as claimed in any preceding claim, wherein the annular seal is axially located between the abutment and the underhead surface of the terminal head of the plug.
9. A self-plugging blind rivet as claimed in any preceding claim, wherein the annular seal is formed of plasticised polyvinyl chloride or nylon 32.
10. A self-plugging blind rivet as claimed in any preceding claim, including an annular washer circumferentially of the shank.
11. A self-plugging blind rivet substantially as hereinbefore described with reference to the accompanying drawings.
Amendments to the claims have been filed, and have the following effect: *(a) Claim 1 above has been textually amended.
*(b) A textually amended claim has been filed as follows:
CLAIMS
1. A self-plugging blind rivet comprising a tubular rivet body, an elongate stem and an annular seal of resiliently deformable material, the body having an elongate shank, a radial enlargement providing a rivet head at one end of the shank, a tail end at the other end of the shank, and a bore extending axially through the rivet head and the shank to the tail end, the stem extending through the bore of the body and comprising a stem-tail which projects from the head end of the body, and a plug connected to the stem tail, the plug having a generally cylindrical first part adjacent to the stem-tail, a second part which is spaced from the stem-tail by the first part, and a radially enlarged terminal head at the end of the stem remote from the stem-tail, the terminal head presenting an underhead surface which faces towards the stem-tail for abutting the tail end of the shank, and the diameter of the plug in the second part being reduced to provide an annular groove adjacent to the terminal head and an abutment which faces generally towards the terminal head, the said annular seal being seated in the annular groove and extending circumferentially of the plug, the shank of the body having a main portion adjacent to the rivet head, and an end portion spaced from the rivet head by the main portion, the internal surface of the end portion compressively engaging the outer peripheral surface of the annular seal so as to resist separation of the body from the stem and seal prior to use, the external diameter of the end portion of the shank reducing progressively in a direction away from the main portion and towards the tail end to a diameter at the tail end less than that of the main portion and not appreciably greater than that of the terminal head of the plug, so that a compressive force sufficient to set the rivet will, when exerted on the shank by pulling the stem tail, cause the shank to bulge at a position spaced from the tail end thus forming a blind head, and will cause material at the tail end to enter the annular groove thus further compressing the annular seal between the body and the plug and providing means on the body for abutting the abutment of the plug so as to retain the plug within the body of the set rivet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08422036A GB2163823A (en) | 1984-08-31 | 1984-08-31 | Self-plugging blind rivet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08422036A GB2163823A (en) | 1984-08-31 | 1984-08-31 | Self-plugging blind rivet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8422036D0 GB8422036D0 (en) | 1984-10-03 |
| GB2163823A true GB2163823A (en) | 1986-03-05 |
Family
ID=10566083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08422036A Withdrawn GB2163823A (en) | 1984-08-31 | 1984-08-31 | Self-plugging blind rivet |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2163823A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2231378A (en) * | 1986-08-06 | 1990-11-14 | Pastushin Victor | Pre-locked pull-type blind fastener |
| EP0571686A1 (en) * | 1992-05-27 | 1993-12-01 | William E. Anspach, Jr. | Rivet for attaching objects |
| EP0589144A1 (en) * | 1992-09-23 | 1994-03-30 | GESELLSCHAFT FÜR BEFESTIGUNGSTECHNIK GEBR. TITGEMEYER GmbH & CO. KG. | Rivet connection |
| GB2288648A (en) * | 1994-04-12 | 1995-10-25 | Avdel Systems Ltd | Removable rivet |
| WO2008037884A2 (en) * | 2006-09-27 | 2008-04-03 | Eris Sarl | Rivet-type blind fixing device |
| CN107061457A (en) * | 2017-06-16 | 2017-08-18 | 无锡安士达五金有限公司 | The outer detachable rivet of expansion is inlayed in one kind |
| CN107864636A (en) * | 2015-06-03 | 2018-03-30 | 戴姆勒股份公司 | For the method and joint element that at least two components are bonded together by flowing shaping rivet sleeve |
| WO2019104339A1 (en) * | 2017-11-27 | 2019-05-31 | Sps Technologies, Llc | Two-piece blind fastener |
| CN110541876A (en) * | 2019-08-27 | 2019-12-06 | 航天精工股份有限公司 | Sealed self-plugging rivet |
| US10974310B2 (en) | 2017-11-28 | 2021-04-13 | Sps Technologies, Llc | Automatic double-action fastener installation tool |
| EP3366932B1 (en) | 2017-02-22 | 2021-10-27 | Bollhoff Otalu | Crimping insert, attachment element and assembly comprising such an insert and methods for manufacturing such parts |
-
1984
- 1984-08-31 GB GB08422036A patent/GB2163823A/en not_active Withdrawn
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2231378A (en) * | 1986-08-06 | 1990-11-14 | Pastushin Victor | Pre-locked pull-type blind fastener |
| EP0571686A1 (en) * | 1992-05-27 | 1993-12-01 | William E. Anspach, Jr. | Rivet for attaching objects |
| EP0589144A1 (en) * | 1992-09-23 | 1994-03-30 | GESELLSCHAFT FÜR BEFESTIGUNGSTECHNIK GEBR. TITGEMEYER GmbH & CO. KG. | Rivet connection |
| GB2288648A (en) * | 1994-04-12 | 1995-10-25 | Avdel Systems Ltd | Removable rivet |
| AU682573B2 (en) * | 1994-04-12 | 1997-10-09 | Avdel Systems Limited | Rivet |
| WO2008037884A2 (en) * | 2006-09-27 | 2008-04-03 | Eris Sarl | Rivet-type blind fixing device |
| WO2008037884A3 (en) * | 2006-09-27 | 2008-05-22 | Marcel Jamin | Rivet-type blind fixing device |
| CN107864636A (en) * | 2015-06-03 | 2018-03-30 | 戴姆勒股份公司 | For the method and joint element that at least two components are bonded together by flowing shaping rivet sleeve |
| US10751788B2 (en) | 2015-06-03 | 2020-08-25 | WS Wieländer + Schill Professionelle Karosserie-Spezialwerkzeuge GmbH & Co. KG | Method and joining element for joining at least two components by means of a flow-formed rivet sleeve |
| EP3366932B1 (en) | 2017-02-22 | 2021-10-27 | Bollhoff Otalu | Crimping insert, attachment element and assembly comprising such an insert and methods for manufacturing such parts |
| CN107061457A (en) * | 2017-06-16 | 2017-08-18 | 无锡安士达五金有限公司 | The outer detachable rivet of expansion is inlayed in one kind |
| CN107061457B (en) * | 2017-06-16 | 2018-08-21 | 无锡安士达五金有限公司 | The outer detachable rivet of expansion is inlayed in one kind |
| WO2019104339A1 (en) * | 2017-11-27 | 2019-05-31 | Sps Technologies, Llc | Two-piece blind fastener |
| US11143226B2 (en) | 2017-11-27 | 2021-10-12 | Sps Technologies, Llc | Two-piece blind fastener |
| US10974310B2 (en) | 2017-11-28 | 2021-04-13 | Sps Technologies, Llc | Automatic double-action fastener installation tool |
| CN110541876A (en) * | 2019-08-27 | 2019-12-06 | 航天精工股份有限公司 | Sealed self-plugging rivet |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8422036D0 (en) | 1984-10-03 |
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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) |