AU2021209308A1 - Concrete fastener and method of fastening same - Google Patents

Concrete fastener and method of fastening same Download PDF

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Publication number
AU2021209308A1
AU2021209308A1 AU2021209308A AU2021209308A AU2021209308A1 AU 2021209308 A1 AU2021209308 A1 AU 2021209308A1 AU 2021209308 A AU2021209308 A AU 2021209308A AU 2021209308 A AU2021209308 A AU 2021209308A AU 2021209308 A1 AU2021209308 A1 AU 2021209308A1
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AU
Australia
Prior art keywords
concrete
fastener
cutting tip
diameter
hole
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.)
Pending
Application number
AU2021209308A
Inventor
Elizabeth Chidiac
Youssef Chidiac
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU2021209308A priority Critical patent/AU2021209308A1/en
Publication of AU2021209308A1 publication Critical patent/AU2021209308A1/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0094—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw the screw being assembled or manufactured from several components, e.g. a tip out of a first material welded to shaft of a second material
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0026—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being a hard non-organic material, e.g. stone, concrete or drywall
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0068—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw with multiple-threads, e.g. a double thread screws
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0084—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by geometric details of the tip
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
    • F16B25/103—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a drilling screw-point, i.e. with a cutting and material removing action
    • 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
    • F16B35/044—Specially-shaped ends
    • F16B35/045—Specially-shaped ends for retention or rotation by a tool

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

A concrete fastener configured for simultaneous drilling and fastening into concrete, the concrete fastener comprising a head via which a drill can drive the fastener into concrete; an elongate body extending downwardly from the head, the body comprising a first end proximate to the head and an opposite distal end; and a first thread extending along a length of the body, wherein the distal end of the body comprises a cutting tip configured for drilling into the concrete to form a hole via which the fastener is to be fastened in the concrete, the cutting tip having a drill diameter that is less than the first diameter of the first thread such that in use, as the hole is drilled into the concrete, the body of the fastener is configured to be driven into the hole being formed by the cutting tip such that the fastener anchors into the concrete. 4/6 4 10 8 14 16 12 Figure 4

Description

4/6
4
10
8 14
16
12
Figure 4
Concrete fastener and method of fastening same
Field of the invention
The present patent specification discloses a concrete fastener. In
particular, the specification discloses a concrete fastener comprising a
concrete screw having a cutting or drill-like tip such that the concrete
fastener can be drilled and screwed into concrete simultaneously.
Background
Figure 1 depicts a concrete screw 2 that is commonly screwed into
concrete to fix objects and structures thereto. The screw 2 comprises a
head 4 that is engageable with a drill, such as a hammer drill. The screw 2
also comprises an elongate body carrying a relatively sharp thread 8
configured to cut and anchor into concrete.
To screw a concrete screw 2 into concrete, it is conventional
knowledge and practice to first drill a pilot hole, using a drill and a drill bit,
such as a masonry drill bit. The drill diameter of the drill bit is typically
selected so that it is slightly smaller than that of the major thread
diameter of the concrete screw 2. For example, if a 12mm concrete screw
is to be screwed into concrete, then a drill bit having a 10mm drill
diameter may be selected to form the pilot hole.
As such, the well-known and long-unchanged practice for fastening
concrete screws 2 into concrete involves three main steps: the first being
the drilling of a pilot hole (typically of a smaller diameter than the concrete
screw and drilled to a greater depth than the concrete screw is intended to
penetrate into the concrete); the second being the removal of the drill bit
from the hole (and any resulting dust therein formed during drilling); the
third being screwing the concrete screw 2 into the pre-drilled hole.
Since concrete screws as fastened into concrete only after inserting
them into pre-drilled holes, existing concrete screws typically have a
relatively blunt end 9, as shown in Figure 1. While other concrete screws
may have a sharpened tip, such screws are still not configured to drill a
hole in concrete - they too are simply screwed into concrete via a
pre-formed pilot hole.
The known method and practice comprise several steps, the use of
drill bits, and often differently powered and configured drills (one for
drilling the pilot hole, the other for driving the concrete screw into the pilot
hole). As such, the known method and practice is relatively time, labour,
equipment and/or material-intensive. From a commercial standpoint, this
translates to reduced productivity and cost-effectiveness.
There is a need to address the above, and/or at least provide a
useful alternative.
Summary
According to a first aspect of the present invention, there is provided
a concrete fastener configured for simultaneous drilling and fastening into
concrete, the concrete fastener comprising:
(a) a head via which a drill can drive the fastener into concrete;
(b) an elongate body extending downwardly from the head, the
body comprising a first end proximate to the head and an opposite distal
end; and
(c) a first thread extending at least partially along a length of the body, the first thread having a first diameter,
wherein the distal end of the body comprises a cutting tip configured
for drilling into the concrete to form a hole via which the fastener is to be
fastened in the concrete, the cutting tip having a drill diameter that is less
than the first diameter of the first thread such that in use, as the hole is
drilled into the concrete, the body of the fastener is configured to be driven
into the hole being formed by the cutting tip such that the fastener
screwthreadingly anchors into the concrete.
According to embodiments of the present invention, the cutting tip is
formed from tungsten carbide.
According to embodiments of the present invention, the cutting tip is
formed from hardened steel.
According to embodiments of the present invention, the cutting tip is
integrally formed with the body.
According to embodiments of the present invention, the cutting tip is
welded or soldered to the body.
According to embodiments of the present invention, the body further
comprises a second thread in an alternating arrangement with the first
thread, the second thread having a second diameter that is smaller than
the first diameter and greater than the drill diameter.
According to a second aspect of the present invention, there is
provided method of fastening into concrete a concrete fastener according
to a first aspect of the invention, comprising driving said fastener into
concrete such that:
(a) the cutting tip forms a hole having a diameter that is
substantially the same as the drill diameter of the cutting tip; and
(b) the body of the fastener progresses into the hole and is
screwed into the concrete as the hole is formed by the cutting tip such that
the fastener is fastened to the concrete.
Brief description of the drawings
An embodiment of the invention will now be described, by way of
example only, with reference to the accompanying drawings in which:
Figure 1 is a side view of a prior art concrete screw;
Figure 2(a) is a front view of a concrete fastener according to
embodiments of the present invention;
Figure 2(b) is a side view of the concrete screw of Figure 2(a);
Figure 3(a) is a bottom view of the concrete fastener of Figure 2(a);
Figure 3(b) is a close-up bottom perspective view of a cutting tip of
the concrete fastener of Figure 2(a);
Figure 4 is a first assembly view of a concrete fastener according to
embodiments of the present invention;
Figure 5 is a second assembly view of the concrete fastener of Figure
4; Figure 6 is a bottom perspective view of a concrete fastener
according to embodiments of the present invention.
Detailed description
Figures 2 to 6 show embodiments of the present concrete fastener
10. Generally speaking, the present concrete fastener has the head 4 and
body 6 of a concrete screw, though the distal end of the body 6 comprises a cutting tip 12 similar to the tips of masonry drill bits. In this way, the present concrete fastener 10 can simultaneously be drilled and screwed into concrete via a single drilling step.
With particular reference to Figures 2(a), 2(b), and 6, the present
concrete fastener 10 comprises a head 4 that can be gripped or held by a
drill and/or a drill adapter/attachment such that the present fastener 10
can be driven by a drill.
The figures show the fastener 10 having a hex style head 4, though
other head styles are of course applicable. The head 4 is configured to be
driven into or against the concrete into which the present concrete
fastener 10 is to be fastened.
The present concrete fastener 10 also comprises a substantially
elongate body 6 extending downwardly and substantially perpendicularly
from the head 4. The length and diameter of the body 6 can of course vary
according to the requirements of the fastening to be accomplished.
A first thread 8 having a first diameter winds along an exterior of the
body 6. In the depicted embodiment, the present concrete fastener 10 also
has a parallel second thread 14 having a second diameter which winds
along an exterior of the body 6 in an alternating relationship with the first thread 8. The diameter of the first thread 8 is larger than the diameter of the second thread 14.
As depicted in the Figures, both the first and second threads 8, 14
extend along a substantial length of the body, starting at or close to the
head 4, and ending toward an opposite distal cutting end 12 of the body 6.
In use, at least the first thread 8 is configured to cut directly into concrete
to enable the present concrete fastener 10 to be fastened thereinto.
Referring also to Figures 3(a) and 3(b), the distal end of the present
concrete fastener 10 comprises a cutting tip 12. In particular, the cutting
tip 12 is configured like that of a drill bit. For example, the cutting tip 12
may be configured like the cutting tip of a masonry drill bit. As such, the
present concrete fastener 10 can be drilled directly into concrete to form a
hole.
Moreover, as the hole is being formed by the cutting tip 12, the
threaded body 6 of the concrete fastener 10 can simultaneously be driven
directly into the hole that is being formed, and thus screwthreadingly
anchor itself into the concrete. In other words, the present fastener 10 is
capable of being drilled and screwed into concrete in a single drilling
motion or action.
Stated another way, there is no need to form a pilot hole using a
separate drill bit before screwing in the present fastener 10. Instead, the
very fastening (i.e., screwing) of the present concrete fastener 10 into
concrete is configured to occur simultaneously as the fastener 10 is drilled
to form a hole in the concrete via its cutting or drilling tip. The threaded
body 6 of the present concrete fastener 10 simply follows directly behind
the cutting tip 12 as the hole is being formed and screws into the
cylindrical concrete wall of the hole being drilled.
Referring back to Figures 2(a) and 2(b), it can be seen that the drill
diameter of the cutting tip 12 is less than the diameter of the first thread
8. In other words, the diameter of the hole formed by the cutting tip 12 is
less than the diameter of the first thread 8. In this way, the hole formed
by the cutting tip 12 is narrower than the diameter of the first thread 8,
such that as the body 6 of the concrete fastener 10 follows the cutting tip
12 into the hole being formed, the diameter of the concrete hole is
sufficiently narrow such that the first thread 8 must cut through the
cylindrical wall of the hole to fasten the present concrete fastener 10 into
the concrete.
Figures 4 and 5 show an embodiment of the present concrete
fastener 10 wherein it may be formed from two parts that are integrally
joined together (e.g. via welding or soldering). For example, a lower end of
the body 6 may comprise a cross-shaped slot 16, and the cutting tip 12 may have a corresponding cross-shaped cross-section configured to be inserted in the cross-shaped slot 16. Of course, in other embodiments of the present concrete fastener 10, it may be formed as a single, integral unit.
Many modifications of the above embodiments will be apparent to
those skilled in the art without departing from the scope of the present
invention. For example, while the cutting tip 12 of the present fastener 10
may be formed from the same material as the rest of the fastener 10 (e.g.,
high tensile steel), the tip 12 may also be formed from a different material,
such as tungsten carbide. Alternatively, if the entire concrete fastener 10 is
substantially formed from steel, it is envisaged that the cutting tip 12 may
be hardened (e.g., heat-treated) so that it is better able to endure the
process of drilling into concrete.
While the present figures show the cutting tip 12 having a cross
head-like drill tip configuration, the cutting tip 12 may of course be in the
form of any other known drill tip configuration, provided that the cutting
tip 12 is sharp and strong enough to be drilled into concrete.
The material and construction of the present concrete fastener 10
may be such that, if so desired, it can be reused. In other words, it is
envisaged that the present concrete fastener 10 can be fastened into concrete, and then unfastened therefrom by unscrewing it from the concrete, and then fastened into concrete at a new location.
Throughout this specification and the claims which follow, unless the
context requires otherwise, the word "comprise", and variations such as
"comprises" and "comprising", will be understood to imply the inclusion of
a stated integer or step or group of integers or steps but not the exclusion
of any other integer or step or group ofintegers or steps.
The reference in this specification to any prior publication (or
information derived from it), or to any matter which is known, is not, and
should not be taken as an acknowledgment or admission or any form of
suggestion that that prior publication (or information derived from it) or
known matter forms part of the common general knowledge in the field of
endeavour to which this specification relates.

Claims (7)

Claims:
1. A concrete fastener configured for simultaneous drilling and fastening into concrete, the concrete fastener comprising: (a) a head via which a drill can drive the fastener into concrete; (b) an elongate body extending downwardly from the head, the body comprising a first end proximate to the head and an opposite distal end; and
(c) a first thread extending at least partially along a length of the body, the first thread having a first diameter, wherein the distal end of the body comprises a cutting tip configured for drilling into the concrete to form a hole via which the fastener is to be fastened in the concrete, the cutting tip having a drill diameter that is less than the first diameter of the first thread such that in use, as the hole is drilled into the concrete, the body of the fastener is configured to be driven into the hole being formed by the cutting tip such that the fastener screwthreadingly anchors into the concrete.
2. The concrete fastener of claim 1, wherein the cutting tip is formed from tungsten carbide.
3. The concrete fastener of claim 1, wherein the cutting tip is formed from hardened steel.
4. The concrete fastener of claim 1 or 2, wherein the cutting tip is
integrally formed with the body.
5. The concrete fastener of any one of the preceding claims, wherein
the cutting tip is welded or soldered to the body.
6. The concrete fastener of any one of the preceding claims, wherein
the body further comprises a second thread in an alternating arrangement
with the first thread, the second thread having a second diameter that is
smaller than the first diameter and greater than the drill diameter.
7. A method of fastening into concrete a concrete fastener according to
any one of the preceding claims, comprising driving said fastener into
concrete such that:
(a) the cutting tip forms a hole having a diameter that is
substantially the same as the drill diameter of the cutting tip; and
(b) the body of the fastener progresses into the hole and is
screwed into the concrete as the hole is formed by the cutting tip such that
the fastener is fastened to the concrete.
6 1/6
2
Figure 1 8
AU2021209308A 2021-07-29 2021-07-29 Concrete fastener and method of fastening same Pending AU2021209308A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2021209308A AU2021209308A1 (en) 2021-07-29 2021-07-29 Concrete fastener and method of fastening same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU2021209308A AU2021209308A1 (en) 2021-07-29 2021-07-29 Concrete fastener and method of fastening same

Publications (1)

Publication Number Publication Date
AU2021209308A1 true AU2021209308A1 (en) 2023-02-16

Family

ID=85176226

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2021209308A Pending AU2021209308A1 (en) 2021-07-29 2021-07-29 Concrete fastener and method of fastening same

Country Status (1)

Country Link
AU (1) AU2021209308A1 (en)

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