AU649736B2 - Roof screw - Google Patents
Roof screw Download PDFInfo
- Publication number
- AU649736B2 AU649736B2 AU86841/91A AU8684191A AU649736B2 AU 649736 B2 AU649736 B2 AU 649736B2 AU 86841/91 A AU86841/91 A AU 86841/91A AU 8684191 A AU8684191 A AU 8684191A AU 649736 B2 AU649736 B2 AU 649736B2
- Authority
- AU
- Australia
- Prior art keywords
- threaded portion
- screw
- pitch
- head
- roof
- 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
- 125000006850 spacer group Chemical group 0.000 claims description 8
- 230000035515 penetration Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002023 wood Substances 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
- 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
- F16B25/0073—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 characterised by its pitch, e.g. a varying pitch
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
- E04D3/36—Connecting; Fastening
- E04D3/3605—Connecting; Fastening of roof covering supported directly by the roof structure
- E04D3/3606—Connecting; Fastening of roof covering supported directly by the roof structure the fastening means being screws or nails
-
- 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
- F16B25/0031—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 screw being designed to be screwed into different materials, e.g. a layered structure or through metallic and wooden parts
-
- 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
- F16B25/0057—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 the screw having distinct axial zones, e.g. multiple axial thread sections with different pitch or thread cross-sections
-
- 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
-
- 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
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
- F16B5/0275—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread the screw-threaded element having at least two axially separated threaded portions
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
Description
S F Ref: 195471
AUSTRALIA
PATENTS ACT 1990 C COMPLETE SPECIFICATION FOR A STANDARD PATENT
ORIGINAL
I--
Name and Address of Applicant: Actual Inventor(s): Address for Service: Invention Title: Council for Scientific and Industrial Research Scientia, Meiring Naude Road Pretoria REPUBLIC OF SOUTH AFRICA Nicolaas Hendrik Arnold Spruson Ferguson, Patent Attoriieys Level 33 St Martins Tower, 31 Market Street Sydney, New South Wales, 2000, Australia Roof Screw 00. 00 00 0000 000 0 a 0 00 0 g 00 The following statement is a full description of this invention, including the best method of performing it known to me/us:- FIELD OF INVENTION This invention relates to fasteners. More particularly, the invention relates to a screw suitable for securing one object to another.
BACKGROUN1D OF THE INVE ION Water penetration past conventional roof fasteners and metal roofing sheets is a problem in the building industry. Various screws and seals and combinations thereof are used for fixing roof sheeting in such a way as to attempt to prevent the entry of rain water. However, many of the prior art seals still allow water penetration.
A large proportion of this water penetration could be prevented if the screw was designed in such a manner that the roofing sheets, sealing washer and screw head were mounted in permanent contact with one another and thus in a sealed condition for the life of S.0. 15 the roof.
99 •0 In the process of driving the roof screws through the roof sheets, the sheets are bent and/or dented particularly the bottom sheet(s) in areas where they overlap and, because the screws are normally only driven through the ridges of the corrugated iron sheets, 'where they are unsupported in their immediate vicinity, small valleys are formed around the screws in the regions where they are driven through the roof sheets. Gaps usually also exist between the roof screws and the surrounding roof sheet material. In the absence of effective sealing means around the roof screws, these 25 valleys or indentations may contibute to rain water passing through the gaps, some of which could penetrate the timber into which the roof screws are secured, causing the timber to swell and S eventually to decay with a result that the roof screws become loose.
There accordingly exists a need for a fastener which either totally prevents or at least partially reduces the possibility of leakages from occurring through a gap between the fastener and the surrounding roof sheet material.
SUMMARY OF THE INVENTION In accordance with the present invention, there is provided a substantially cylindrically shaped screw comprising a head at one end thereof, a first threaded portion having a first pitch at the opposite end thereof, a second threaded portion having a second pitch which is greater than the first pitch and which is located intermediate the first threaded portion and the head, and a first unthreaded portion intermediate the head and the second threaded portion. The end opposite the head is preferably pointed, so as to facilitate its penetration through a roof sheet and into a 15 support means. In addition or as an alternative, the end may be ooo provided with one or more self-tapping cutting edges, to e 6 facilitate its entry into hard substances such as iron or steel.
Thus the screw may be driven or screwed through the roof sheet by S.means of respectively a hammer or a screw driver or similar tool.
ooe The second pitch may vary from about 1,01 times to about 4 times, more preferably from about 1,25 times to about 2,0 times the first pitch.
@Oo q In a preferred embodiment of the invention, the second pitch is about 1,5 times the first pitch.
In the context of a roof screw, i.e. a screw to be used for S securing a roof plate to a support means, the first pitch is preferably about 3,5mm and the second pitch is preferably about 5,25mm.
The length of the first threaded portion may vary from about 1,01 times the length of the second threaded portion, to about 4 times the length of the second threaded portion.
In one embodiment of the invention, the length of the first threaded portion only just exceeds 1,5 times the length of the second threaded portion. However, the length of the first threaded portion should preferably still be long enough for proper securing of the roof sheet into the support means.
Alternatively, the lengths of the first and second threaded portions may be selected such as to suit the conditions of a specific profile and of a specific material to which the roof sheet is to be secured.
For example, in a case where South African pine is to be used as a support for the roof sheet, it has been found that a length of 50mm for the first threaded portion yields good results (to firmly anchor the roof sheet in the wood). For a single IBR sheet having a crown height of 38mm, a length for the second threaded portion of from a minimum of about 20mm to a maximum of about 36mm slightly less than the crown height) is required to ensure that, even if the IBR sheet is badly bent down when the roof screw is screwed therethrough, the second threaded portion will still lift the IBR sheet to approximately its original position. The length of the first threaded portion preferably exceeds the ratio which the first pitch forms to the second pitch multiplied by the crown height of the roof sheet.
The crown height is the distance between the crowns or ridges and the valleys of the roof sheet.
In order to facilitate manufacture of the screw, it may also .*se comprise a second unthreaded portion located between the first threaded portion and the second threaded portion.
Conveniently, the minor diameter of the first threaded portion is the same as that of the second threaded portion, the first unthreaded portion and the second unthreaded portion. In the context of a roof screw, the minor diameter is preferably about 6mm, but may vary between about 1,0mm and about The crest or major diameter of the first threaded portion may be the same as or different from that of the second threaded portion.
'In the context of a roof screw, this diameter is preferably about 8mm but may vary between about 1,5mm and about Also according to the invention, the screw may comprise a cylindrically shaped spacer portion located between the head and the first unthreaded portion, the diameter of the spacer portion being larger than that of the minor diameter, preferably even slightly larger than the major diameter of the first threaded portion and that of the second threaded portion so that the spacer portion may serve as a shoulder against which the roof sheet or roof sheets may be pushed once the screw has been screwed into the support means.
The length of the spacer portion is preferably selected such that it is only slightly less than the thickness or height of a flexible seal so that the seal will be compressed when the screw is screwed down into the support means. On the other hand, the e" 'flexible seal should not be compressed too much, because excessive deformation may give rise to leakage which could either happen as ^20 a result of such excessive deformation that the seal leaks ab initio or as a result of rapid deterioration of the seal after installation.
Depending on the material of construction and the geometry of the seal, we have found that the length of the spacer portion may be varied from about 20% of the thickness or height of the seal, to about 100% thereof, more preferably from about 40% to about 98% thereof and still more preferably from about 45% to about S" thereof.
o The length of the first unthreaded portion may vary widely from S" 30 close to 0, say O,Imm, to several times the diameter of the screw.
Conveniently, its length is such as to accommodate at least one, preferably at least two and more preferably, at least four roof sheets. In this context, allowance should be made for the fact that the roof sheets often are deformed when the screw is driven therethrough, so that the space taken up by a single roof sheet may be as much as up to three to four times its thickness, and even more.
BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described, by way of example, with reference to the accompanying drawings in which: Figure 1 shows a part sectional elevational view of a screw in accordance with the invention, the lower part of which is partly screwed into a wooden beam; and Figure 2 shows the screw of Figure 1 in a position in which it has been fully screwed down.
DETAILED DESCRIPTION OF THE DRAWINGS Referring to the drawings, reference numeral 10 generally indicates the screw.
The screw 10 comprises a first threaded portion 12 having a first pitch 14 and a second threaded portion 16 having a second pitch 18, which is 1,5 times the first pitch 14.
S
20 As appears from the drawings, the screw 10 is of a substantially cylindrical shape and comprises a head 20 at its one end and a pointed tip 22 at its other end.
*see 60060° The first threaded portion 12 extends from the tip 22 to a position intermediate the tip 22 and the head 20 and the second threaded portion 16 is located between the first threaded portion 12 and the head The screw 10 further comprises a first unthreaded portion 24 located between the second threaded portion 16 and the head 20, as well as a second unthreaded portion 26 located between the first threaded portion 12 and the second threaded portion 16.
Both the minor diameter and the crest or major diameter of the first threaded portion 12 is the same as that of the second threaded portion 16. In addition, in order to avoid excessive stresses on the transition from a threaded portion to an unthreaded portion and vice versa, the minor diameters of the first and second threaded portions are the same as the diameter of the first and second unthreaded portions.
The screw 10 further comprises a cylindrical spacer portion 28 located between the head 20 and the second unthreaded portion 16, for locating a seal (not shown) and for preventing excessive compression thereof.
As is shown in the drawings, the screw 10 extends through roof oBe sheets 30, 32, 34, 36 into a beam 38.
In Figure 1, the screw 10 is shown as having penetrated the roof sheets 30, 32, 34, 36 and it is beginning to enter the wooden beam 20 38, whilst in Figure 2, the screw 10 has been screwed down fully.
In use, a pilot hole is drilled through the ridge or ridges of one, two or four roof sheets in a position in which they are to be secured to an underlying wooden or metal beam, such as the wooden beam 38. As a result of the drilling action, the bottom most roof 25 sheet 30 could be bent such that its free end 30.1 is spaced from the roof sheet 32, as is shown in Figure 1. If sufficient pressure is exerted when the pilot hole is drilled (or sometimes even punched) or when the screw 10 is driven through the roof sheets "to 36 by means of a hammer, the sheets 32, 34 and 36 may be dented 30 and/or bent in the region of the hole such as to form localised valleys.
The first threaded portion 12 of the screw 10 is then screwed into the hole until it eventually engages with the beam 38, as is shown in Figure 1. Soon afterwards, the trailing end of the first threaded portion disengages with the roof sheets 30 to 36 whereafter the leading end of the second threaded portion begins to engage with them. Upon further turning of the screw 10, the second threaded portion 16 begins to lift the roof sheets 30 to 36, because the pitch 18 of the second threaded portion 16 is greater than the pitch 14 of the first threaded portion 12. The roof sheets 30 to 36 are lifted one by one until eventually they disengage with the trailing end of the second threaded portion 16 and are "stored" in the region of the first unthreaded portion 24 (see Figure As can also be seen from Figure 2, the end 30.1 of the roof sheet 30 has now been urged back against the sheet 32.
Conveniently, the length of the first unthreaded portion 24 is selected such that it can accommodate four roof sheets 30 to 36.
•In order to time the disengagement of the roof sheets 30 to 36 ,our "from the second threaded portion 16, the length of the second threaded portion 16 is conveniently selected such as to be somewhat less than the crown height of the roof sheets 30, 32, 34 and 36.
The length of the first threaded portion 12 is selected such as to slightly exceed the distance between the crest of the top roof sheet 36 and the top of the beam 38.
25 The claims which follow are to be considered an integral part of *.No the disclosure.
6 4
Claims (9)
1. A substantially cylindrically shaped screw comprising a head at one end thereof, a firs-t threaded portion having a first pitch at the opposite end thereof, a second threaded portion having a second pitch which is greater than the first pitch and which is located intermediate the first threaded portion and the head, and a first unthreaded portion intermediate the head and the second threaded portion, wherein the length of the first threaded portion is between 1.01 times the length of the second threaded portion and 4 times the length of the second threaded portion.
2. A substantially cylindrically shaped screw suitable for mounting a profiled roof sheet to support means, the screw comprising a head at one end thereof, a first threaded portion having a first pitch at the opposite end thereof, a second threaded portion having a second pitch which is greater than the first pitch and which is located intermediate the first threaded portion and the head, and a first unthreaded portion intermediate the head and the second threaded portion, wherein the length of the first threaded portion exceeds the ratio which the first pitch fo'ms to the second pitch, multiplied by the crown height of the roof sheet.
3. A screw as claimed in claim 1 or claim 2, in which the second pitch is between 1.01 times and 4 times the first pitch.
4. A screw as claimed in any one of the preceding claims, 2 comprising a second unthreaded portion located between the first threaded S" 25 portion and the second threaded portion. 0
5. A screw as claimed in claim 4, in which the minor diameter of the first threaded portion is the same as that of the second threaded portion, the first unthreaded portion and the second unthreaded portion.
6. A screw as claimed in any one of the preceding claims, in which the major diameter of the first threaded portion is the same as that of the second threaded portion.
7. A screw as claimed in any one of the preceding claims, comprising a cylindrically shaped spacer portion located between the head and the first unthreaded portion, the diameter of the spacer portion being larger than that of the minor diameter. .ol
8. A screw as claimed in any one of the preceding claims, in which the end opposite the head is pointed so as to facilitate its penetration through a roof sheet and into a support means.
9. A screw as claimed in claim 8, in which the end opposite the head is provided with a cutting edge. A substantially cylindrically shaped screw substantially as hereinbefore described with -eference to the accompanying drawings. DATED this 7WENTY-NINTH day of MARCH 1994 Council for Scientific and Industrial Research Patent Attorneys for the Applicant SPRUSON FERGUSON 0o0 0 00 0000 0 0 0 *000 0 0 OS 000 9 Roof Screw Abstract A screw (10) is disclosed which comprises a head (20) at one end, a first threaded portion (12) having a first pitch (14) at the opposite end thereof, a second threaded portion (16) having a second pitch (18) which is greater than the first pitch (14) and which is located intermediate the first threaded portion (12) and the head and a first unthreaded portion (24) intermediate the head (20) and the second threaded portion The screw (10) is particularly useful for securing roof sheets (30, 32, 34, 36) to underlying support means such as a wooden or steel beam (38) ge Figure 1 O0 o S 00u a* a e a C 0* KRS/3062D
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA908791 | 1990-11-02 | ||
| ZA90/8791 | 1990-11-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU8684191A AU8684191A (en) | 1992-05-07 |
| AU649736B2 true AU649736B2 (en) | 1994-06-02 |
Family
ID=25580371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU86841/91A Ceased AU649736B2 (en) | 1990-11-02 | 1991-10-29 | Roof screw |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU649736B2 (en) |
| GB (1) | GB2251666A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2140475C (en) * | 1995-01-18 | 2000-03-07 | Uli Walther | Screw |
| DE29621923U1 (en) * | 1996-12-17 | 1998-04-16 | Mitek Ind Gmbh | Timber structure connection system |
| DE29805784U1 (en) * | 1998-03-30 | 1999-08-05 | Sfs Industrie Holding Ag, Heerbrugg | Screw for fastening wooden slats to a roof or wall substructure |
| CA2304694C (en) | 1997-09-22 | 2004-02-03 | Sfs Industrie Holding Ag | Screw for fixing wooden laths on a roof substructure or a wall foundation |
| DE20003705U1 (en) * | 2000-02-29 | 2001-07-12 | Sfs Ind Holding Ag Heerbrugg | Connection of two wooden beams that adjoin one another at least approximately at right angles |
| CA2452521C (en) * | 2003-01-07 | 2008-10-21 | Altenloh, Brinck & Co. Gmbh & Co. Kg | Self-tapping screw for composite materials |
| GB2428761B (en) * | 2005-08-01 | 2008-04-09 | Michael Wilkinson | Universal screw |
| US7255523B2 (en) | 2005-12-22 | 2007-08-14 | Prime Source Building Products, Inc. | Dual threaded screw for composite materials |
| DE202012013100U1 (en) * | 2012-06-15 | 2014-10-30 | Reisser Schraubentechnik Gmbh | screw |
| PL3415773T3 (en) * | 2017-06-15 | 2020-06-29 | Sfs Intec Holding Ag | Screw with a multi-speed jack thread and fastening arrangement for same |
| JP2019078153A (en) * | 2017-10-25 | 2019-05-23 | ヒロテツ工業株式会社 | Drill screw for folded-plate roof and folded-plate roof method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1277044A (en) * | 1968-09-09 | 1972-06-07 | Illinois Tool Works | Screw-type fasteners |
| GB2169051A (en) * | 1984-12-21 | 1986-07-02 | Sfs Stadler Ag | Screws for fastening roof or wall liners |
-
1991
- 1991-10-24 GB GB9122612A patent/GB2251666A/en not_active Withdrawn
- 1991-10-29 AU AU86841/91A patent/AU649736B2/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1277044A (en) * | 1968-09-09 | 1972-06-07 | Illinois Tool Works | Screw-type fasteners |
| GB2169051A (en) * | 1984-12-21 | 1986-07-02 | Sfs Stadler Ag | Screws for fastening roof or wall liners |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9122612D0 (en) | 1991-12-04 |
| AU8684191A (en) | 1992-05-07 |
| GB2251666A (en) | 1992-07-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7597518B1 (en) | Fastener apparatus for roofing and steel building construction | |
| AU649736B2 (en) | Roof screw | |
| CA2183843C (en) | Screw with increased driving resistance at proper depth | |
| AU712980B2 (en) | Screw fastener in metal connector to wood structure shear connection | |
| US4292876A (en) | Washer | |
| AU2003100147B4 (en) | Cutting screw | |
| NZ248798A (en) | Impact drivable fastener having a tapered helical fluted section with ribs and flutes increasing from zero value adjacent to tip end towards head end | |
| EP0129404B1 (en) | Fixings including screws and clamp plates | |
| AU7880998A (en) | Stress plate with depending sleeve | |
| US20160186793A1 (en) | Compression indentation fastener device | |
| AU2002214828A1 (en) | Cutting Screw | |
| US10184505B2 (en) | Compressive indentation fastener device | |
| US5529451A (en) | Self-supporting roofing nail | |
| US3909905A (en) | Gutter installation tools | |
| US1897335A (en) | Corrugated metal fastener | |
| US1995705A (en) | Nail | |
| WO2000020767A1 (en) | Threaded fastening system | |
| JP3708937B2 (en) | New roof mounting tool and new roof mounting method | |
| US1995706A (en) | Nail | |
| KR20000035902A (en) | Fastener for corrugated sheeting | |
| AU757669B2 (en) | Threaded fastening system | |
| AU694544B2 (en) | Fastener for corrugated sheeting | |
| US20240151037A1 (en) | Low-Profile Skylight Device | |
| AU666579B2 (en) | Impact drivable fastener | |
| GB2150660A (en) | A fastener |