AU2007100685B4 - Spin Weld Fitting - Google Patents
Spin Weld Fitting Download PDFInfo
- Publication number
- AU2007100685B4 AU2007100685B4 AU2007100685A AU2007100685A AU2007100685B4 AU 2007100685 B4 AU2007100685 B4 AU 2007100685B4 AU 2007100685 A AU2007100685 A AU 2007100685A AU 2007100685 A AU2007100685 A AU 2007100685A AU 2007100685 B4 AU2007100685 B4 AU 2007100685B4
- Authority
- AU
- Australia
- Prior art keywords
- spin weld
- weld fitting
- central
- circular flange
- fitting
- 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.)
- Ceased
Links
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- Lining Or Joining Of Plastics Or The Like (AREA)
Description
ORIGINAL
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION For an Innovation Patent Invention title: "SPIN WELD FITTING" Applicant: DEBRA CAROL WILLIAMS DARREN ROBERT KAPUTIN Associated Provisional Application No.: The following statement is a full description of the invention, including the best method of performing it known to me: "SPIN WELD FITTING" Field of the Invention SThe present invention relates to a spin weld fitting.
Background to the Invention o00
INO
SSpin welding is a known friction welding process used to bond two Sthermoplastic parts together. The process involves providing relative rotational Smotion between the parts to be joined while the parts are in contact. Friction between the two parts heats the thermoplastic material and causes the material at the interface to melt. Removal of the rotation allows the parts to cool and join as the material sets.
It is common to use a spin weld process to fix a threaded aperture into a vessel. A threaded portion of thermoplastics material is formed having a generally circular flange. The flange is welded around a hole provided in the vessel by a spin weld process. The fitting is formed entirely of thermoplastic material and therefore the final result is a vessel having a thread of plastic material.
A particular problem with such fittings is that plastic threads can be damaged or stripped by over-tightening. The threaded part must then be replaced.
References to prior art in this specification are provided for illustrative purposes only and are not to be taken as an admission that such prior art is part of the common general knowledge in Australia or elsewhere.
Summary of the Invention According to one aspect of the present invention, there is provided a spin weld fitting comprising: a central portion of thermoplastic material having a circular aperture; Sa circular flange of thermoplastic material extending outwardly from the central C portion, the circular flange having means to engage with a tool for rotating the spin weld fitting; and N a cylindrical metal portion received in the circular aperture, the cylindrical metal portion having an internal thread; 00oo wherein the cylindrical metal portion has on an outer surface thereof surface Sfeatures for bonding with the central thermoplastics portion to prevent relative Srotational movement of the metal portion and central thermoplastic portion.
SPreferably the surface features provided on the outer surface of the metal portion comprise knurling.
Preferably, the central portion is generally cylindrical in shape and the circular flange extends perpendicular to the longitudinal axis of the aperture from a longitudinal end thereof.
The outer surface of the central portion may be tapered such that the central portion is thicker adjacent the circular flange.
The circular flange includes means to engage with a tool for rotating the spin weld fitting. Preferably, the means to engage with a tool comprises a pair of diametrically opposed lugs.
Throughout the specification, unless the context requires otherwise, the word "comprise" or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers. Likewise the word "preferably" or variations such as "preferred", will be understood to imply that a stated integer or group of integers is desirable but not essential to the working of the invention.
0 Brief Description of the Drawings The nature of the invention will be better understood from the following detailed description of preferred embodiments of the spin weld fitting, given by c way of example only, with reference to the accompanying drawings, in which: Figure 1 is a side cross sectional view of a spin weld fitting in oo00 accordance with the present invention; and
INO
Figure 2 is a top view of the spin weld fitting of Figure 1.
Detailed Description of Preferred Embodiments A preferred embodiment of the spin weld fitting 10 in accordance with the invention, as illustrated in Figures 1 and 2, comprises a central portion 12 of thermoplastic material having a circular flange 14 of thermoplastic material extending around the periphery thereof.
The central portion 12 is generally of a cylindrical shape having a circular aperture 16. The circular flange 14 extends in a plane perpendicular to the longitudinal axis of the aperture 16 from a longitudinal end of the central portion, as can be seen in Figure 1. The outer surface of the central portion 12 is tapered outwardly towards the flange 14 such that the central portion 12 is thicker adjacent the flange 14.
The spin weld fitting 10 includes also a cylindrical metal portion 18 which is received in the aperture 16 of the central portion 12. The cylindrical metal portion 18 is constructed of a suitable metal material and includes a thread on the inner surface of for receiving a complementary threaded member (not shown). If the spin weld fitting 10 were to be installed on a tank for holding fluid, the complementary threaded member may be a threaded plug for sealing the opening in the tank.
The cylindrical metal portion 18 is provided on an outer surface thereof with surface features for ensuring that the metal portion 18 bonds with the O thermoplastic central portion 12 during manufacture to prevent relative rotation c of the metal portion 18 and central portion 12. The surface features may comprise knurling. The knurling on the surface binds with the thermoplastic of the central portion 12 during manufacture and thereby prevents rotation of the cylindrical metal portion 18 relative to the central portion 12. Thus when a threaded fitting is screwed into the metal portion 18, the threaded fitting can 00 00be suitably tightened. The bond also creates a seal between the central portion 12 and the cylindrical metal portion 18 so that the spin weld fitting 10 is watertight.
c 10 The spin weld fitting 10 is also provided with means on the flange 14 for engaging with a tool for rotation of the spin weld fitting 10. In the embodiment shown, the flange is provided with a pair of diametrically opposed lugs 22. The lugs 22 may be engaged by a suitable spin weld tool. In use, the lugs 22 are engaged with the tool and the surface of the flange 14 opposite the lugs 22 is spun against the surface to which the spin weld fitting 10 is to be welded.
It will be readily apparent to persons skilled in the relevant arts that various modifications and improvements may be made to the foregoing embodiments, in addition to those already described, without departing from the basic inventive concepts of the present invention. Therefore, it will be appreciated that the scope of the invention is not limited to the specific embodiments described and is to be determined from the appended claims.
Claims (5)
1. A spin weld fitting comprising: a central portion of thermoplastic material having a circular aperture; a circular flange of thermoplastic material extending outwardly from the central 00 oo D portion, the circular flange having means to engage with a tool for rotating the 0 spin weld fitting; and Sa cylindrical metal portion received in the circular aperture, the cylindrical metal portion having an internal thread; wherein the cylindrical metal portion has on an outer surface thereof surface features for bonding with the central thermoplastics portion to prevent relative rotational movement of the metal portion and central thermoplastic portion.
2. A spin weld fitting in accordance with claim 1, wherein the surface features comprise knurling.
3. A spin weld fitting in accordance with claim 1 or, wherein the central portion is generally cylindrical in shape and the circular flange extends perpendicular to the longitudinal axis of the aperture from a longitudinal end thereof.
4. A spin weld fitting in accordance with claim 3, wherein the outer surface of the central portion is tapered such that the central portion is thicker adjacent the circular flange. Q
5. A spin weld fitting in accordance with any one of the preceding claims, wherein the circular flange includes means to engage with a tool for rotating n the spin weld fitting. oo 00 O 2 Dated this 2 5 th day of July 2007 00 Debra Carol Williams Darren Robert Kaputin by their Patent Attorneys Janet Stead Associates
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2007100685A AU2007100685B4 (en) | 2007-07-25 | 2007-07-25 | Spin Weld Fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2007100685A AU2007100685B4 (en) | 2007-07-25 | 2007-07-25 | Spin Weld Fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2007100685A4 AU2007100685A4 (en) | 2007-08-30 |
| AU2007100685B4 true AU2007100685B4 (en) | 2009-03-26 |
Family
ID=38476342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2007100685A Ceased AU2007100685B4 (en) | 2007-07-25 | 2007-07-25 | Spin Weld Fitting |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2007100685B4 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB838798A (en) * | 1958-02-15 | 1960-06-22 | Douglas Norman Manton | Improvements in or relating to flanges or neck rings for metal pipes or bodies |
| US3446688A (en) * | 1963-11-21 | 1969-05-27 | Valer Flax | Apparatus for spin welding a thermoplastic endpiece to an open-ended thermoplastic tubular body |
| US4790573A (en) * | 1986-07-07 | 1988-12-13 | Tubos E Conexoes Tigre S/A | Sealing system between a metal insert and plastic coupling, and resulting product |
| US5286001A (en) * | 1990-11-15 | 1994-02-15 | Karl Rafeld Kg Spritzgusswerk, Elektronik Und Formenbau | Plumbing and heating pipe system for water supply purposes, made either completely or mainly of plastic material, especially of polypropylene |
| AU2002317044B2 (en) * | 2001-07-25 | 2006-12-07 | Philmac Pty Ltd | Coupling or transition fitting for the connection of metal or plastic pipes |
-
2007
- 2007-07-25 AU AU2007100685A patent/AU2007100685B4/en not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB838798A (en) * | 1958-02-15 | 1960-06-22 | Douglas Norman Manton | Improvements in or relating to flanges or neck rings for metal pipes or bodies |
| US3446688A (en) * | 1963-11-21 | 1969-05-27 | Valer Flax | Apparatus for spin welding a thermoplastic endpiece to an open-ended thermoplastic tubular body |
| US4790573A (en) * | 1986-07-07 | 1988-12-13 | Tubos E Conexoes Tigre S/A | Sealing system between a metal insert and plastic coupling, and resulting product |
| US5286001A (en) * | 1990-11-15 | 1994-02-15 | Karl Rafeld Kg Spritzgusswerk, Elektronik Und Formenbau | Plumbing and heating pipe system for water supply purposes, made either completely or mainly of plastic material, especially of polypropylene |
| US5341843A (en) * | 1990-11-15 | 1994-08-30 | Rafeld Kunststofftechnik Gmbh U. Co. Kg. | Plumbing and heating pipe system for water supply purposes, made either completely or mainly of plastic material, especially of polypropylene |
| AU2002317044B2 (en) * | 2001-07-25 | 2006-12-07 | Philmac Pty Ltd | Coupling or transition fitting for the connection of metal or plastic pipes |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2007100685A4 (en) | 2007-08-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| FF | Certified innovation patent | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |