GB2305703A - Screwthreaded fixing device - Google Patents

Screwthreaded fixing device Download PDF

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Publication number
GB2305703A
GB2305703A GB9519663A GB9519663A GB2305703A GB 2305703 A GB2305703 A GB 2305703A GB 9519663 A GB9519663 A GB 9519663A GB 9519663 A GB9519663 A GB 9519663A GB 2305703 A GB2305703 A GB 2305703A
Authority
GB
United Kingdom
Prior art keywords
shank portion
plain
head
shank
fixing device
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.)
Withdrawn
Application number
GB9519663A
Other versions
GB9519663D0 (en
Inventor
John Michael Pitts
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 GB9519663A priority Critical patent/GB2305703A/en
Publication of GB9519663D0 publication Critical patent/GB9519663D0/en
Publication of GB2305703A publication Critical patent/GB2305703A/en
Withdrawn legal-status Critical Current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
    • 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
    • F16B15/00—Nails; Staples
    • F16B15/06—Nails; Staples with barbs, e.g. for metal parts; Drive 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
    • F16B25/001—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
    • F16B25/0015—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 soft organic material, e.g. wood or plastic
    • 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
    • F16B25/0063—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 with a non-threaded portion on the shaft of the screw

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Connection Of Plates (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

An elongate fixing device has a head 2 and an elongate shank 4, the head having a slot 3 or the like enabling the device to be turned about the longitudinal axis of the shank by a suitable tool (such as a screwdriver). The shank has a sharp pointed tip 8 remote from the head and, intermediate the pointed tip and the head, in the order specified, a plain, non-threaded outwardly partly tapering shank portion 7 and an externally threaded shank portion 6 extending between the plain shank portion and the head. The sharp pointed tip and the plain shank portion can be hammered into an object of wood or the like, and the device can then be driven further by means of a screwdriver or the like.

Description

Fixing device The present invention is concerned with a fixing device suitable for fixing into wood or similar materials.
Wood screws of conventional type are designed to be secured by driving into a partly or wholly preformed hole, which may be preformed by using a tool such as a bradawl, or by hammering a nail into the wood. This step of preforming the hole is timeconsuming, and it is sometimes difficult to remove the nail or the like without damaging the wood. Some workers therefore hammer such screws directly into wood, but the screws are not designed to be used in this way because such hammering causes tearing of the wood fibres, with consequent impairment of the holding strength. Furthermore, conventional screws do not provide good holding power when substantially parallel to the wood grain.
Nails, on the other hand, are very convenient and easy to use, but their holding power is worse than that of conventional wood screws, they do not provide good holding power when substantially parallel to the wood grain, and they are difficult to remove without damaging either the wood or the nail.
I have now developed an improved fixing device which at least alleviates the disadvantages listed above of known fixing devices.
According to the invention, therefore, there is provided an elongate fixing device which comprises a head portion and a longitudinally extending shank portion, the head portion having means enabling the device to be turned about the longitudinal axis of the shank portion by a suitable tool; the shank portion having a sharp pointed tip remote from the head portion and intermediate said pointed tip and said head portion, in the order specified, a plain, non-threaded outwardly tapering shank portion and an externally threaded shank portion extending between said plain shank portion and said head portion, the sharp pointed tip and the plain shank portion being arranged to be hammered into an object of wood or the like.
Conveniently, the threaded portion extends over about 20 to 80% of the length of the device, preferably about 60So. The threaded portion typically has a thread of the type conventionally provided on wood screws, so that the fixing device can be screwed into the object after the plain shank portion has been hammered therein. The plain shank portion typically extends over about 10 to 40% of the length of the device, preferably about 30%.
It is preferred that there is a further plain non-threaded shank portion extending between the threaded portion and the head portion.
Preferred features of the present 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 fixing device according to the invention; and Figure 2 shows alternative forms of the head of the device of Figure 1.
Referring to the drawings, the fixing device 1 includes a countersunk head 2 with a slot 3 arranged to be driven by a conventional screwdriver blade (not shown), an elongate shank 4 having, in the order specified, a short, plain, non-threaded portion 5, an externally threaded portion 6 extending along the majority of the length of the shank, and a further plain, non-threaded portion 7 extending from the threaded portion 6 up to a pointed tip 8. The threads on the threaded portion 6 are typically of the type which enables the fixing device to be driven, when rotatably driven about its longitudinal axis, into an object of wood or the like.
The fixing device just described may be used in an object of wood or the like by first hammering the pointed tip 8 and the non-threaded portion 7 into the object until the device is held firmly in position. The device is then further driven, by turning the head with a suitable screwdriver, until the head is flush with the surface of the wood. The device may be withdrawn by turning the screwdriver in the opposite sense.
The fixing device shown in Figure 1 has a slotted countersunk head; it may alternatively be provided with crossed slots to receive a screwdriver of "Phillips" type (as shown with reference numeral 9 in Figure 2). In other embodiments, the head may be of a noncountersunk type and/or of hexagonal shape to receive a spanner.

Claims (6)

Claims:
1. An elongate fixing device which comprises a head portion and a longitudinally extending shank portion, the head portion having means enabling the device to be turned about the longitudinal axis of the shank portion by a suitable tool; the shank portion having a sharp pointed tip remote from the head portion and, intermediate between said pointed tip and said head portion, in the order specified, a plain, non threaded outwardly tapering shank portion and an externally threaded shank portion extending between said plain shank portion and said head portion, the sharp pointed tip and the plain shank portion being arranged to be hammered into an object of wood or the like.
2. A device according to claim 1, wherein the threaded portion extends over 20 to 80% of the length of said device.
3. A device according to claim 1 or 2, wherein the plain shank portion extends over 10 to 40% of the length of said device.
4. A device according to any of claims 1 to 3, which includes a further plain non threaded shank portion extending between the threaded portion and the head portion.
5. An elongate fixing device substantially as described herein with reference to Figure 1 of the accompanying drawings.
6. A method of applying a fixing device according to any of claims 1 to 5 to an object, which comprises hammering said device into said object, and then driving the device further into said object using a tool engaging said turning means.
GB9519663A 1995-09-27 1995-09-27 Screwthreaded fixing device Withdrawn GB2305703A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9519663A GB2305703A (en) 1995-09-27 1995-09-27 Screwthreaded fixing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9519663A GB2305703A (en) 1995-09-27 1995-09-27 Screwthreaded fixing device

Publications (2)

Publication Number Publication Date
GB9519663D0 GB9519663D0 (en) 1995-11-29
GB2305703A true GB2305703A (en) 1997-04-16

Family

ID=10781325

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9519663A Withdrawn GB2305703A (en) 1995-09-27 1995-09-27 Screwthreaded fixing device

Country Status (1)

Country Link
GB (1) GB2305703A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2361977A (en) * 2000-05-05 2001-11-07 Robert Butler Self locating wood screw
DE10060244A1 (en) * 2000-12-05 2002-06-20 Lutz Planitz Screw has sharp, unthreaded point, allowing it to be partially driven in with hammer, after which it is screwed in as usual
DE10258238A1 (en) * 2002-12-13 2004-07-15 Audi Ag Self-piercing screw for making a joint, with diameter of the upper cylindrical shaft being smaller than the thread outer diameter
DE102022132885A1 (en) 2022-12-09 2024-06-20 Böllhoff Verbindungstechnik GmbH Two-stage joining process, joining connection with a stack of components and joining device therefor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB394398A (en) * 1932-01-01 1933-06-29 Heyman Rosenberg Improvements in threaded fasteners
GB585887A (en) * 1944-08-29 1947-02-27 Albert Ernest Applegate Improvements in screwed bolts
GB1479600A (en) * 1973-11-13 1977-07-13 British Screw Co Ltd Threaded fastener and method and tool for inserting same
GB2005171A (en) * 1977-10-06 1979-04-19 Terep Techn Res & Prod Eng Co Self-piercing and self-tapping screw
GB2275091A (en) * 1993-02-13 1994-08-17 Gordon Wall A drive bolt

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB394398A (en) * 1932-01-01 1933-06-29 Heyman Rosenberg Improvements in threaded fasteners
GB585887A (en) * 1944-08-29 1947-02-27 Albert Ernest Applegate Improvements in screwed bolts
GB1479600A (en) * 1973-11-13 1977-07-13 British Screw Co Ltd Threaded fastener and method and tool for inserting same
GB2005171A (en) * 1977-10-06 1979-04-19 Terep Techn Res & Prod Eng Co Self-piercing and self-tapping screw
GB2275091A (en) * 1993-02-13 1994-08-17 Gordon Wall A drive bolt

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2361977A (en) * 2000-05-05 2001-11-07 Robert Butler Self locating wood screw
DE10060244A1 (en) * 2000-12-05 2002-06-20 Lutz Planitz Screw has sharp, unthreaded point, allowing it to be partially driven in with hammer, after which it is screwed in as usual
DE10258238A1 (en) * 2002-12-13 2004-07-15 Audi Ag Self-piercing screw for making a joint, with diameter of the upper cylindrical shaft being smaller than the thread outer diameter
DE10258238B4 (en) * 2002-12-13 2005-11-10 Audi Ag Nail screw for producing a joint connection, and a joining method using the nail screw and a device for performing the joining process
DE102022132885A1 (en) 2022-12-09 2024-06-20 Böllhoff Verbindungstechnik GmbH Two-stage joining process, joining connection with a stack of components and joining device therefor

Also Published As

Publication number Publication date
GB9519663D0 (en) 1995-11-29

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Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)