AU2021221724A1 - Nut with injection port for reinforcing bar - Google Patents

Nut with injection port for reinforcing bar Download PDF

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Publication number
AU2021221724A1
AU2021221724A1 AU2021221724A AU2021221724A AU2021221724A1 AU 2021221724 A1 AU2021221724 A1 AU 2021221724A1 AU 2021221724 A AU2021221724 A AU 2021221724A AU 2021221724 A AU2021221724 A AU 2021221724A AU 2021221724 A1 AU2021221724 A1 AU 2021221724A1
Authority
AU
Australia
Prior art keywords
nut
port
reinforcing bar
injection
thread
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
AU2021221724A
Inventor
Cameron GILMOUR
Emanuele NACCINI
Terry SEAGRAVE
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.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
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 Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Priority to AU2021221724A priority Critical patent/AU2021221724A1/en
Priority to AU2022209356A priority patent/AU2022209356A1/en
Priority to US17/892,778 priority patent/US20230065174A1/en
Priority to EP22191786.7A priority patent/EP4141270A1/en
Publication of AU2021221724A1 publication Critical patent/AU2021221724A1/en
Pending legal-status Critical Current

Links

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
    • 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
    • F16B39/021—Locking of screws, bolts or nuts in which the locking takes place after screwing down by injecting a settable material after the screwing down
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups

Abstract

A nut for threading onto a reinforcing bar, wherein the nut includes a female thread for threading onto a male thread of the reinforcing bar, wherein the nut includes a port arranged such that, when the nut is in situ on the reinforcing bar the port provides a passage for injection of fluid material to flow into a cavity defined by an external surface of the reinforcing bar and an internal surface of the nut. 2/7 F6 Figure 2

Description

2/7
F6
Figure 2
NUT WITH INJECTION PORT FOR REINFORCING BAR FIELD OF THE INVENTION
The present invention relates generally, but not exclusively, to a flange nut for providing a headed anchorage to a reinforcing bar for reinforcing concrete.
BACKGROUND TO THE INVENTION
It is known to provide reinforcing bar for reinforcing concrete. It is also known to provide flange nuts for the purpose of being used as headed anchorages on the end of a reinforcing bar. Typically these flange nuts are used at the end of the reinforcement as termination points or bar ends and are secured with a half nut and recommended epoxy.
The applicant has identified that it would be desirable to use the flange nut product in expanded applications to include flange nuts being installed in mid-bar applications or installed at a certain distance from the bar end. It has been identified by the applicant that this may make the application of epoxy difficult for customers. More specifically, the applicant has identified that the current procedure and product design relies on the user applying epoxy to an internal thread of the flange nut prior to winding down the bar. This would cause a number of negative points including one or more of the following:
• epoxy coating the reinforcing bar as the flange nut is wound down causing a messy installation which requires extra labour to be cleaned (see Figure 1); and • loss of epoxy in the connection between the reinforcing bar and flange nut will compromise the joint between the two components. The applicant has determined that it is critical that epoxy completely fills a void between the external thread of the reinforcing bar and an internal thread of the flange nut to guarantee a required stiffness of the joint.
Examples of the present invention seek to provide an improved nut which obviates or at least alleviates one or more disadvantages of existing anchorage nuts.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a nut for threading onto a reinforcing bar, wherein the nut includes a female thread for threading onto a male thread of the reinforcing bar, wherein the nut includes a port arranged such that, when the nut is in situ on the reinforcing bar the port provides a passage for injection of fluid material to flow into a cavity defined by an external surface of the reinforcing bar and an internal surface of the nut.
Preferably, the port extends generally radially with respect to a longitudinal axis about which the nut rotates.
In a preferred form, the port is transverse of the nut, extending between an outer surface of the nut and an inner surface of the nut.
It is preferred that said port is a first port and the nut also includes a second port opposite the first port. More preferably, the second port is diametrically opposite the first port.
Preferably, the nut includes a cap for covering the port.
Preferably, the nut includes a flange.
In a preferred form, the port is located in a central portion of the nut with respect to a longitudinal direction of the nut.
In accordance with another aspect of the present invention, there is provided an assembly including a reinforcing bar and a nut, wherein the nut is threaded onto the reinforcing bar such that an internal thread of the nut engages with a corresponding external thread of the reinforcing bar, wherein the nut includes a port arranged such that the port provides a passage for injection of fluid material to flow into a cavity defined by an external surface of the reinforcing bar and an internal surface of the nut.
In accordance with another aspect of the present invention, there is provided a method of securing a nut on a reinforcing bar, including the steps of threading the nut onto the reinforcing bar such that an internal thread of the nut is threaded onto an external thread of the reinforcing bar, rotating the nut to locate the nut in a desired position along a length of the reinforcing bar, and injecting settable material through a port of the nut such that the settable material flows into a cavity between an external surface of the reinforcing bar and an internal surface of the nut.
Preferably, the method further includes the step of observing a second port opposite the first port to determine when sufficient settable material has been injected through the first port, and ceasing injection of the settable material in response to observing sufficient settable material through the second port.
BRIEF DESCRIPTION OF THE DRAWINGS
Preferred embodiments of the invention will be described, by way of a non-limiting example only, with reference to the accompanying drawings in which:
Figure 1 shows an epoxy coating of a reinforcing bar after a flange nut has been wound into position;
Figure 2 shows a steel flange nut in accordance with an example of the present invention, showing an injection port in position;
Figure 3 shows a cross-sectional view of a steel flange nut, showing injection port detail;
Figure 4 shows a dimensioned cross section of injection port detail;
Figure 5 shows an ISNE (Injection System Nozzle Epoxy) nozzle inserted into the injection port;
Figure 6 shows a cross section of an ISNE nozzle inserted into injection port.
Figure 7 shows a perspective view of the injection port position in relation to surrounding external detail of the nut;
Figure 8 shows a cross sectional view of the nut on a reinforcing bar with epoxy volume depicted;
Figure 9 shows a perspective view of the flange nut located on the reinforcing bar;
Figure 10 shows a perspective view of the flange nut located on the reinforcing bar, with a half nut in front of the flange nut; and
Figure 11 shows a perspective view of the flange nut located on the reinforcing bar, with a half nut behind the flange nut.
DETAILED DESCRIPTION
With reference to Figure 1 of the drawings, the applicant has determined that existing flange nuts 10 will provide difficulty to users as epoxy 12 is applied to an internal thread of the flange nut 10 prior to fitting of the flange nut 10 on the reinforcing bar 14. Accordingly, the applicant has identified that the epoxy 12 will be smeared along the length of the reinforcing bar 14 (see Figure 1), creating messiness, waste and possibly an inferior connection.
As shown in Figures 2 to 11 of the drawings, the applicant has identified that an improved flange nut 10 may be provided by including an injection port 16. In particular, the applicant has identified that the inclusion of an injection port 16 is applicable to steel flange nut 10 products. Advantageously, the inclusion of the injection port 16 aids the application of epoxy 12 as well as providing a solution for installing the flange nut 10 at a position that is not on the end of the reinforcing bar 14.
Accordingly, Figures 2 to 11 show a nut 10 for threading onto a reinforcing bar 14, wherein the nut includes a female thread 18 for threading onto a male thread 20 of the reinforcing bar 14. The nut 10 includes a port 16 arranged such that, when the nut 10 is in situ on the reinforcing bar 14 (see Figure 8) the port 16 provides a passage for injection of fluid material to flow into a cavity 22. The cavity 22 is defined between an external surface 24 of the reinforcing bar 14 and an internal surface 26 of the nut 10. The fluid material may be in the form of epoxy 12.
As shown in Figure 3, the port 16 extends generally radially with respect to a longitudinal axis 28 about which the nut 10 rotates. In the example shown, the port 16 is transverse of the nut 10, extending between an outer surface 30 of the nut 10 and an inner surface 32 of the nut 10.
The port 16 may be in the form of a first port and the nut 10 may also be provided with a second port 34 opposite the first port 16. The second port 34 may be diametrically opposite the first port 16, as shown in Figure 3.
In one example, the nut 10 may include a cap (not shown) for covering the or each port 16. Additionally, the nut 10 may include a flange 36 to assist with the purpose of being used as an anchorage on the reinforcing bar 14 within concrete when the concrete has set.
The port 16 may be located in a generally central portion of the nut 10 with respect to a longitudinal direction 28 of the nut 10.
Another aspect of the present invention provides an assembly 38 including the flange nut 10 and the reinforcing bar 14, when assembled. Accordingly, with reference to Figure 8, there is provided an assembly 38 including the reinforcing bar 14 and the nut 10. The nut 10 is threaded onto the reinforcing bar 14 such that the internal thread 18 of the nut 10 engages with the corresponding external thread 20 of the reinforcing bar 14. The nut 10 includes the port 16 arranged such that the port 16 provides a passage for injection of fluid material 12 to flow into the cavity 22 defined by the external surface 24 of the reinforcing bar 14 and the internal surface 26 of the nut 10.
The invention also provides another aspect of a method of securing the nut 10 on the reinforcing bar 14. The method includes the steps of threading the nut 10 onto the reinforcing bar 14 such that the internal thread 18 of the nut 10 is threaded onto the external thread 20 of the reinforcing bar 14, rotating the nut 10 to locate the nut 10 in a desired position along a length of the reinforcing bar 14, and injecting settable material through a port 16 of the nut 10 such that the settable material flows into the cavity 22 between an external surface 24 of the reinforcing bar 14 and an internal surface 26 of the nut 10.
The method may further include the step of observing the second port 34 opposite the first port 16 to determine when sufficient settable material has been injected through the first port 16, and ceasing injection of the settable material in response to observing sufficient settable material through the second port 34.
The following unique details and innovative features of the product component have been identified:
1. Inclusion of an injection port 16 in the design of the flange nut 10 (see Figure 2).
2. Dimensions of the injection port 16 may be standard across all flange nut sizes and may be designed to fit the ISNE (Injection System Nozzle Epoxy) nozzle 40 used with the product branded as Ramset Epcon C8 XTREM. Figure 4 shows a detailed cross-section of the injection port 16 detail, including example dimensions. An opening to the injection port 16 may be tapered outwardly to facilitate location and insertion of the nozzle used for injecting settable material.
3. Injection port 16 forms a hole through the flange nut 10 (as shown in Figure 3 and Figure 6). The second port 34 in the form of a secondary hole serves both as an alternative injection point depending on its accessibility and position and as a means to inspect and ensure epoxy 12 has fully filled the thread cavity 22.
4. Position of the injection port 16 such that it does not affect any of the existing flange nut 10 features and detail.
5. Injection port 16 detail may be included in a range of reinforcing bar flange nuts. For example, the injection port 16 detail may be included in a range of reinforcing bar products branded as "ReidBar" Steel Flange Nuts across all sizes including, RB12, RBA16, RBA20, RB20, RB25, RB32.
The system may be assembled either without a half nut 42 (see Figure 9) or with a half nut 42 (see Figures 10 and 11). For assembly without a half nut 42, the following steps are taken:
1. Position flange nut 10 at desired position on reinforcing bar 14.
2. Insert ISNE nozzle 40 fitted to Epcon C8 XTREM cartridge into injection port 16
(or second port 34), whichever is easiest to access.
3. While the nozzle 40 is positioned in the injection port 16, insert epoxy 12 until excess flows from either end of the flange nut 10 and the opposing injection port 34.
4. Do not disturb the assembly after 'gel time' (between 5 and 20 minutes, depending on the temperature) and allow the correct time for the epoxy to cure (between 8 and 60 hours depending on temperature and environmental conditions).
For assembly with a half nut 42, the following steps are taken:
1. Position half nut 10 at desired position on reinforcing bar 14.
2. Wind flange nut 10 on to half nut 42 at desired position on reinforcing bar 14 reinforcement.
3. Tighten half nut 42 on to the flange nut 42 to secure assembly on reinforcing bar 14 reinforcement.
4. Insert ISNE nozzle 40 fitted to Epcon C8 XTREM cartridge into injection port 16 (or second port 34) whichever is easiest to access.
5. While the nozzle 40 is positioned in the injection port 16, insert epoxy 12 until excess flows from free end of the flange nut 10 and the opposing injection port 34.
6. Do not disturb the assembly after 'gel time' (between 5 and 20 minutes, depending on the temperature) and allow the correct time for the epoxy 12 to cure (between 8 and 60 hours depending on temperature and environmental conditions).
Advantageously, as will be appreciated from the above, the applicant has developed an update to its existing steel flange nut design with the inclusion of an injection port 16 detailed above. This allows injection of epoxy 12 after positioning the flange nut 10 on the reinforcing bar 14. This feature update is particularly applicable to a steel flange nut as opposed to a ductile cast iron product.
While various embodiments of the present invention have been described above, it should be understood that they have been presented by way of example only, and not by way of limitation. It will be apparent to a person skilled in the relevant art that various changes in form and detail can be made therein without departing from the spirit and scope of the invention. Thus, the present invention should not be limited by any of the above described exemplary embodiments.
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.
List of numbered features
Flange nut 10 Epoxy 12 Reinforcing bar 14 Injection port 16 Female thread 18 Male thread 20 Cavity 22 External surface 24 Internal surface 26 Longitudinal axis 28 Outer surface 30 Inner surface 32 Secondport 34 Flange 36 Assembly 38 Nozzle 40 Half nut 42

Claims (11)

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:
1. A nut for threading onto a reinforcing bar, wherein the nut includes a female thread for threading onto a male thread of the reinforcing bar, wherein the nut includes a port arranged such that, when the nut is in situ on the reinforcing bar the port provides a passage for injection of fluid material to flow into a cavity defined by an external surface of the reinforcing bar and an internal surface of the nut.
2. A nut as claimed in claim 1, wherein the port extends generally radially with respect to a longitudinal axis about which the nut rotates.
3. A nut as claimed in claim 1 or claim 2, wherein the port is transverse of the nut, extending between an outer surface of the nut and an inner surface of the nut.
4. A nut as claimed in any one of claims I to 3, wherein said port is a first port and the nut also includes a second port opposite the first port.
5. A nut as claimed in claim 4, wherein the second port is diametrically opposite the first port.
6. A nut as claimed in any one of claims 1 to 5, wherein the nut includes a cap for covering the port.
7. A nut as claimed in any one of claims I to 6, wherein the nut includes a flange.
8. A nut as claimed in any one of claims 1 to 7, wherein the port is located in a central portion of the nut with respect to a longitudinal direction of the nut.
9. An assembly including a reinforcing bar and a nut, wherein the nut is threaded onto the reinforcing bar such that an internal thread of the nut engages with a corresponding external thread of the reinforcing bar, wherein the nut includes a port arranged such that the port provides a passage for injection of fluid material to flow into a cavity defined by an external surface of the reinforcing bar and an internal surface of the nut.
10. A method of securing a nut on a reinforcing bar, including the steps of threading the nut onto the reinforcing bar such that an internal thread of the nut is threaded onto an external thread of the reinforcing bar, rotating the nut to locate the nut in a desired position along a length of the reinforcing bar, and injecting settable material through a port of the nut such that the settable material flows into a cavity between an external surface of the reinforcing bar and an internal surface of the nut.
11. A method of securing a nut on a reinforcing bar as defined in claim 10, wherein the method further includes the step of observing a second port opposite the first port to determine when sufficient settable material has been injected through the first port, and ceasing injection of the settable material in response to observing sufficient settable material through the second port.
AU2021221724A 2021-08-25 2021-08-25 Nut with injection port for reinforcing bar Pending AU2021221724A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU2021221724A AU2021221724A1 (en) 2021-08-25 2021-08-25 Nut with injection port for reinforcing bar
AU2022209356A AU2022209356A1 (en) 2021-08-25 2022-07-29 Nut with injection port for reinforcing bar
US17/892,778 US20230065174A1 (en) 2021-08-25 2022-08-22 Nut with injection port for reinforcing bar
EP22191786.7A EP4141270A1 (en) 2021-08-25 2022-08-23 Nut with injection port for reinforcing bar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU2021221724A AU2021221724A1 (en) 2021-08-25 2021-08-25 Nut with injection port for reinforcing bar

Related Child Applications (1)

Application Number Title Priority Date Filing Date
AU2022209356A Division AU2022209356A1 (en) 2021-08-25 2022-07-29 Nut with injection port for reinforcing bar

Publications (1)

Publication Number Publication Date
AU2021221724A1 true AU2021221724A1 (en) 2023-03-16

Family

ID=85480436

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2021221724A Pending AU2021221724A1 (en) 2021-08-25 2021-08-25 Nut with injection port for reinforcing bar

Country Status (1)

Country Link
AU (1) AU2021221724A1 (en)

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