Note: Claims are shown in the official language in which they were submitted.
CLAIMS:
1. A sleeve bolt for insertion in a hole delimited
by a wall, comprising a threaded fastener and an
expansion means, said threaded fastener having a
stem, said stem including a proximal stem section and
a distal threaded section, said proximal stem section
having substantially a diameter of the hole and being
provided at a distal end thereof with an expander
means, said expansion means being adapted to be
threadably engaged onto said distal threaded section
and having a proximal end adapted, upon axial
displacement of said expansion means towards said
proximal stem section resulting from a rotation of
said stem, to engage said expander means such to
expand outwardly into engagement with the wall.
2. A sleeve bolt as defined in claim 1, wherein
said expansion means comprise a distal threaded
member and a proximal expansion wedge, said threaded
member being adapted to be threadably engaged to said
threaded section of said stem, said expansion wedge
being adapted to fractionally engage the wall upon
introduction of said stem in the hole while said
threaded member is spaced from the wall such that,
upon sufficient subsequent rotation of said stem,
said expansion means displace towards said expander
means.
3. A sleeve bolt as defined in claim 2, wherein a
transversal size of said expander means reduces in
direction of said distal threaded section of said
stem such that, upon displacement of said expansion
wedge along said distal threaded section and towards
said expander means, a proximal end of said expansion
wedge engages said expander means and gradually
expands outwardly.
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4. A sleeve bolt as defined in claim 3, wherein
said expander means defines a taper.
5. A sleeve bolt as defined in claim 4, wherein
said expander means comprises a frusto-conical
portion.
6. A sleeve bolt as defined in claims 2 to 5,
wherein said threaded member of said expansion means
comprises a conical section which tapers towards said
expansion wedge, said conical section being adapted,
upon sufficient rotation of said stem and once said
expansion wedge is substantially stationary onto said
expander means, to displace towards and relative to
both said expander means and said expansion wedge
such that said conical section causes a distal end of
said expansion wedge to expand outwardly into
engagement with the wall.
7. A sleeve bolt as defined in claims 2 to 6,
wherein said expansion wedge defines at least one
opening means, said distal threaded member of said
expansion means being engaged in said opening means
such that said expansion wedge and said distal
threaded member rotate jointly with respect to said
stem.
8. A sleeve bolt as defined in claim 7, wherein
said distal threaded member comprises a tab means
extending into said opening means, said tab means
being capable of displacing along said opening means,
upon sufficient rotation of said stem and once said
expansion wedge is substantially stationary onto said
expander means, and of causing said expansion wedge
to expand outwardly.
9. A sleeve bolt as defined in claim 8, wherein
said expansion wedge defines a longitudinal slit
extending along a whole length thereof and through
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said opening means, said opening means comprising a
proximal end portion tapering in direction of
expander means, whereby said tab means, upon engaging
said proximal end portion of said opening means,
cause said expansion wedge to gradually outwardly
expand into the wall.
10. A sleeve bolt as defined in claim 9, wherein
said tab means is adapted, once having displaced past
said proximal end portion of said opening means, to
lodge in a proximal portion of said slit and maintain
said expansion wedge engaged to the wall.
11. A sleeve bolt as defined in claims 8 to 10,
wherein two diametrically opposed opening means are
defined in said expansion wedge, a pair of tabs
extending outwardly from a proximal end of said
threaded member being engaged in said opening means,
said slit extending through one of said opening
means.
12. A sleeve bolt as defined in claim 7, wherein
said distal threaded member comprises a tab means
extending into said opening means, said tab means
being capable of displacing along said opening means,
upon sufficient rotation of said stem and once said
expansion wedge is substantially stationary onto said
expander means, said opening means being closed at a
proximal end thereof.
13. A sleeve bolt for insertion in a hole
delimited by a wall, comprising a threaded fastener
and an expansion means, said threaded fastener having
a stem, said stem including a proximal stem section
and a distal threaded section, said proximal stem
section being provided at a distal end thereof with
an expander means, said expansion means being adapted
to be threadably engaged onto said distal threaded
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section and having a proximal end adapted, upon axial
displacement of said expansion means towards said
proximal stem section resulting from a rotation of
said stem, to engage said expander means such to
expand outwardly into engagement with the wall.
14. A sleeve bolt as defined in claim 13, wherein
said expansion means comprise a distal threaded
member and a proximal expansion wedge, said threaded
member being adapted to be threadably engaged to said
threaded section of said stem, said expansion wedge
being adapted to fractionally engage the wall upon
introduction of said stem in the hole while said
threaded member is spaced from the wall such that,
upon sufficient subsequent rotation of said stem,
said expansion means displace towards said expander
means.
15. A sleeve bolt as defined in claim 14, wherein a
transversal size of said expander means reduces in
direction of said distal threaded section of said
stem such that, upon displacement of said expansion
wedge along said distal threaded section and towards
said expander means, a proximal end of said expansion
wedge engages said expander means and gradually
expands outwardly.
16. A sleeve bolt as defined in claims 14 and 15,
wherein said threaded member of said expansion means
comprises a conical section which tapers towards said
expansion wedge, said conical section being adapted,
upon sufficient rotation of said stem and once said
expansion wedge is substantially stationary onto said
expander means, to displace towards and relative to
both said expander means and said expansion wedge
such that said conical section causes a distal end of
said expansion wedge to expand outwardly into
engagement with the wall.
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17. A method of setting a sleeve bolt in a hole
delimited by a wall, comprising the steps of: (a)
providing a threaded fastener and an expansion means
threadably engaged to a distal end of said fastener;
(b) inserting said expansion means and part of said
threaded fastener in the hole; (c) rotating
sufficiently said fastener with said expansion means
being fractionally engaged to the wall for causing
said expansion means to displace towards a proximal
end of said fastener and for causing a proximal end
of said expansion means to be expanded by said
fastener into engagement with the wall.
18. A method as defined in claim 17, wherein said
fastener has a stem, said stem including a proximal
stem section and a distal threaded section, said
proximal stem section having substantially a diameter
of the hole and being provided at a distal end
thereof with an expander means for expanding said
expansion means in step c), said expansion means
being adapted to be threadably engaged onto said
distal threaded section and having a proximal end
adapted, upon axial displacement of said expansion
means towards said proximal stem section resulting
from a rotation of said stem, to engage said expander
means such to expand outwardly into engagement with
the wall.
19. A method as defined in claim 18, wherein said
expansion means comprise a distal threaded member and
a proximal expansion wedge, said threaded member
being adapted to be threadably engaged to said
threaded section of said stem, said expansion wedge
being adapted to fractionally engage the wall upon
introduction of said stem in the hole while said
threaded member is spaced from the wall such that,
upon sufficient subsequent rotation of said stem,
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said expansion means displace towards said expander
means.
20. A method as defined in claim 19, wherein a
transversal size of said expander means reduces in
direction of said distal threaded section of said
stem such that, upon displacement of said expansion
wedge along said distal threaded section and towards
said expander means, a proximal end of said expansion
wedge engages said expander means and gradually
expands outwardly.
21. A method as defined in claim 20, wherein said
expander means defines a taper.
22. A method as defined in claim 21, wherein said
expander means comprises a frusto-conical portion.
23. A method as defined in claims 19 to 22, wherein
said threaded member of said expansion means
comprises a conical section which tapers towards said
expansion wedge, said conical section being adapted,
upon sufficient rotation of said stem and once said
expansion wedge is substantially stationary onto said
expander means, to displace towards and relative to
both said expander means and said expansion wedge
such that said conical section causes a distal end of
said expansion wedge to expand outwardly into
engagement with the wall.
24. A method as defined in claims 19 to 23, wherein
said expansion wedge defines at least one opening
means, said distal threaded member of said expansion
means being engaged in said opening means such that
said expansion wedge and said distal threaded member
rotate jointly with respect to said stem.
25. A method as defined in claim 24, wherein said
distal threaded member comprises a tab means
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extending into said opening means, said tab means
being capable of displacing along said opening means,
upon sufficient rotation of said stem and once said
expansion wedge is substantially stationary onto said
expander means, and of causing said expansion wedge
to expand outwardly.
26. A method as defined in claim 25, wherein said
expansion wedge defines a longitudinal slit extending
along a whole length thereof and through said opening
means, said opening means comprising a proximal end
portion tapering in direction of expander means,
whereby said tab means, upon engaging said proximal
end portion of said opening means, cause said
expansion wedge to gradually outwardly expand into
the wall.
27. A method as defined in claim 26, wherein said
tab means is adapted, once having displaced past said
proximal end portion of said opening means, to lodge
in a proximal portion of said slit and maintain said
expansion wedge engaged to the wall.
28. A method as defined in claims 25 to 27, wherein
two diametrically opposed opening means are defined
in said expansion wedge, a pair of tabs extending
outwardly from a proximal end of said threaded member
being engaged in said opening means, said slit
extending through one of said opening means.
29. A method as defined in claim 24, wherein said
distal threaded member comprises a tab means
extending into said opening means, said tab means
being capable of displacing along said opening means,
upon sufficient rotation of said stem and once said
expansion wedge is substantially stationary onto said
expander means, said opening means being closed at a
proximal end thereof.
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