GB2368106A - Screw head driving formation - Google Patents

Screw head driving formation Download PDF

Info

Publication number
GB2368106A
GB2368106A GB0025363A GB0025363A GB2368106A GB 2368106 A GB2368106 A GB 2368106A GB 0025363 A GB0025363 A GB 0025363A GB 0025363 A GB0025363 A GB 0025363A GB 2368106 A GB2368106 A GB 2368106A
Authority
GB
United Kingdom
Prior art keywords
screw
chamber
head
blade
screws
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Withdrawn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
GB0025363A
Other versions
GB0025363D0 (en
Inventor
Nigel Watkins
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 GB0025363A priority Critical patent/GB2368106A/en
Publication of GB0025363D0 publication Critical patent/GB0025363D0/en
Publication of GB2368106A publication Critical patent/GB2368106A/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Withdrawn legal-status Critical Current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
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

A screw head (101) has a chamber (103) with a slot (104) for receiving the blade of a driver tool (i.e. screwdriver). The chamber (103) is shaped so that the blade is positively locked within the chamber (103).

Description

SCREW HEAD The present invention relates to screws and set screws.
Conventional screws and certain set screws have heads which incorporate a single transverse slot into which a screw driver is fitted to turn the screw. Other screws have heads which incorporate a tapering depression the crosssection of which is a cross. Such screws and set screws suffer from the disadvantage that the amount of torque which can be applied to the head of the screw or set screw is limited. This is true particularly in the case of round or dome-headed screws where the head is thinnest at the edges where the torque forces are largest.
It is an object of the present invention to provide an improved head for a screw or set screw.
According to the present invention, there is provided a screw or set screw having a head portion and a screw-threaded stem wherein the head of the screw or set screw includes a chamber having an orifice through which a driver blade can be inserted, the chamber being so shaped that on rotation of the driver blade the driver blade is locked positively within the said chamber and engages with bearing surfaces included therein.
The invention will now be described, by way of example, with reference to the accompanying drawing which shows a plan and cross-sectional view of an embodiment of the invention.
Referring to the drawing, a screw 100 has a head portion 101 and a screwthreaded tapering stem portion 102 in the conventional manner.
Formed in the head 101 of the screw 100 there is a chamber 103 which has an entrance slot 104 through which an appropriately shaped screw driver blade (not shown in the drawing) can be inserted. The chamber 103 in the head 101 of the screw 100 is bi-lobate in form and provides two pairs of bearing surfaces 105,106, respectively. The pair of bearing surface 105 enables torque to be applied to the screw in a clockwise direction and the pair of bearing surfaces 106 enables torque to be applied to the screws in a counter clockwise direction.
In use, a screw drier with a T-shaped blade of an appropriate size is inserted into the chamber 103 in the head 101 of the screw 100 through the slot 104. Initial rotation of the screw driver blade causes it to be locked within chamber 103 in the head 101 of the screw 100. Further rotation of the screw driver blade causes it to bear on one or other of the pairs of bearing surfaces 105,106 and turn the screw in the appropriate direction.
As the screw driver blade is locked within the chamber 103 in the head 101 of the screw 100 and the bearing surfaces 105,106 have almost the whole radial thickness of the head 101 of the screw 100 backing them, considerably more torque can be applied to the screw 100 than is possible with conventional screws.
The same principle can be applied to screws and engineering set screws which have parallel-sided stems.

Claims (5)

  1. CLAIMS 1. A screw or set screw having a head portion and a screw-threaded stem wherein the head of the screw or set screw includes a chamber having an orifice through which a driver blade can be inserted, the chamber being so shaped that on rotation of the drive blade, the driver blade is locked positively within the said chamber and engages with bearing surfaces included therein.
  2. 2. A screw or set scrw according to Claim 1 wherein the orifice comprises a transverse slot.
  3. 3. A screw or set screw according to Claim 1 wherein the chamber is bi-lobate in plan.
  4. 4. A screw driver the end of the blade of which is adapted to co-operate with the orifice and chamber of a screw or set screw according to any preceding claim.
  5. 5. A screw or set screw substantially or hereinbefore described and with reference to the accompanying drawings.
GB0025363A 2000-10-17 2000-10-17 Screw head driving formation Withdrawn GB2368106A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0025363A GB2368106A (en) 2000-10-17 2000-10-17 Screw head driving formation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0025363A GB2368106A (en) 2000-10-17 2000-10-17 Screw head driving formation

Publications (2)

Publication Number Publication Date
GB0025363D0 GB0025363D0 (en) 2000-11-29
GB2368106A true GB2368106A (en) 2002-04-24

Family

ID=9901406

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0025363A Withdrawn GB2368106A (en) 2000-10-17 2000-10-17 Screw head driving formation

Country Status (1)

Country Link
GB (1) GB2368106A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008029240A1 (en) * 2008-06-19 2009-12-31 Adam Obersat Connecting device i.e. screw, for connecting work piece i.e. arbitrary component, with dental impact, has under cuts introduced into longitudinal side of side limiting surface, where bracket of tool body is resorted by under cuts
WO2010100434A1 (en) * 2009-03-05 2010-09-10 The University Of Wolverhampton A rotating device and driver
US20220316513A1 (en) * 2021-04-02 2022-10-06 William Norton Fastener
PL131186U1 (en) * 2023-01-05 2024-07-08 Krzysztof Horak Screw

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4339971A (en) * 1978-12-13 1982-07-20 Zatorre Alfredo E Fastener and driving tool
US4538486A (en) * 1982-11-22 1985-09-03 Jacques Lutrat Non-slip screw
WO1994017961A1 (en) * 1993-02-10 1994-08-18 Marvin Bassell Fastener and driving tool
WO2000020766A1 (en) * 1998-10-06 2000-04-13 Lutz Edler Von Der Planitz Screw and screwdriver for a non-slip screw/screw driver pairing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4339971A (en) * 1978-12-13 1982-07-20 Zatorre Alfredo E Fastener and driving tool
US4538486A (en) * 1982-11-22 1985-09-03 Jacques Lutrat Non-slip screw
WO1994017961A1 (en) * 1993-02-10 1994-08-18 Marvin Bassell Fastener and driving tool
WO2000020766A1 (en) * 1998-10-06 2000-04-13 Lutz Edler Von Der Planitz Screw and screwdriver for a non-slip screw/screw driver pairing

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008029240A1 (en) * 2008-06-19 2009-12-31 Adam Obersat Connecting device i.e. screw, for connecting work piece i.e. arbitrary component, with dental impact, has under cuts introduced into longitudinal side of side limiting surface, where bracket of tool body is resorted by under cuts
DE102008029240B4 (en) * 2008-06-19 2012-06-21 Adam Obersat Connecting device, in particular screw, with locking function for detachable connection of workpieces
WO2010100434A1 (en) * 2009-03-05 2010-09-10 The University Of Wolverhampton A rotating device and driver
US20220316513A1 (en) * 2021-04-02 2022-10-06 William Norton Fastener
PL131186U1 (en) * 2023-01-05 2024-07-08 Krzysztof Horak Screw

Also Published As

Publication number Publication date
GB0025363D0 (en) 2000-11-29

Similar Documents

Publication Publication Date Title
US5960681A (en) Socket driver with retaining protuberances and method of manufacturing same
US5251353A (en) Multipurpose plier
KR100774095B1 (en) Combination of screw and screw driver bit and header punch for its manufacture
US5140877A (en) Hexagonal wrench
CA2898480C (en) Anti-slip screwdriver bit
US5551818A (en) Self-drilling fastener
US6393953B1 (en) Combination of screw with driver bit or wrench
US4060114A (en) Tightening device for threaded screw part
KR20000052734A (en) Screw, driver bit and header punch for manufacture of screw
US5674037A (en) Screw having an improved head structure
US4060113A (en) Tightening device for threaded screw part
US3894450A (en) Combined screw driving and screw gripping tool
US4016912A (en) Screwdriver for slotted head screw
GB2368106A (en) Screw head driving formation
US5927165A (en) Hex keys and other tools with non-slip feature
US20190193253A1 (en) Anti-Slip Screwdriver Bit
ES257551U (en) Fastener
US4770546A (en) Tension bush
US3831648A (en) Combined screw driving and screw gripping tool
US6912755B2 (en) Clamping device of a rotating tool
US748241A (en) Screw and driver therefor.
US20090165605A1 (en) Screwdriver with torque-enhancing sidewall edges
US6327939B1 (en) Wrench orifice with lateral gripping grooves
US4334714A (en) Key type connector and bearing device
JP4197546B2 (en) Combination with screw and driver bit

Legal Events

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