GB2367104A - Screw head slot which retains a complementary screwdriver - Google Patents

Screw head slot which retains a complementary screwdriver Download PDF

Info

Publication number
GB2367104A
GB2367104A GB0023535A GB0023535A GB2367104A GB 2367104 A GB2367104 A GB 2367104A GB 0023535 A GB0023535 A GB 0023535A GB 0023535 A GB0023535 A GB 0023535A GB 2367104 A GB2367104 A GB 2367104A
Authority
GB
United Kingdom
Prior art keywords
screw
tip
driver
screw driver
head
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Withdrawn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
GB0023535A
Other versions
GB0023535D0 (en
Inventor
Maxim Jago Sam Hobbins
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 GB0023535A priority Critical patent/GB2367104A/en
Publication of GB0023535D0 publication Critical patent/GB0023535D0/en
Publication of GB2367104A publication Critical patent/GB2367104A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B15/00—Screwdrivers
    • B25B15/001—Screwdrivers characterised by material or shape of the tool bit
    • B25B15/004—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
    • B25B15/007—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section with blade of flat or substantially flat cross-section
    • 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
    • F16B23/0015—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 substantially rectangular, e.g. one-slot head
    • 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
    • F16B23/0023—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 substantially cross-shaped

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 has a threaded shaft (2) and a head (1) with an angled slot. A screwdriver has (4) a tip corresponding to the slot such that when the tip of the screwdriver (4) is inserted in the slot ad imparts rotational pressure to the screw head (1) then the tip is retained by the slot.

Description

LOCKING SCREW SYSTEM This invention relates to a locking screw and screw driver set.
When attempting to tighten screws a great deal of force is sometimes necessary to keep the head of the screw driver in the screw slot. This is mainly because holding the screw driver or electric screw driver bit at anything other than a perfect 9CLO angle results in'turning pressure'forcing the screw driver head out of the screw. This is particularly troublesome with electric screw drivers which can spin the driving bit at high speed knocking the screw head. This damages both the screw and the screw driver tip.
The new design of screw incorporates an angle in the screw slot which matches an angle at the tip of the screw driver such that twisting the screw driver forces the tip deeper into the screw. This allows almost all force to be applied to twisting the screw driver. The design of the screw does not prohibit the use of normal screw drivers and neither does the design of the screw driver prohibit using it with normal screws. The widest part of the screw driver tip is thinner than the channel cut into the screw head, allowing the tip of the screw driver to be put into the screw channel in the same manner as standard screws and screw drivers.
Conveniently, the invention provides a screw and screw driver set, the screw comprising a threaded portion and a head portion incorporating a captive slot and the screw driver comprising a tip of complementary shape whereby, in use, with the tip in engagement with the captive slot, rotation of the srew driver retains the tip in engagement with the screw.
Preferably, the invention provides a screw comprising a threaded portion and a head portion, which head portion is provided with a captive slot adapted to be engaged, in use, by a complementary shaped tip of a screw driver whereby rotation of the screw driver retains the tip in engagement with the screw.
The invention also conveniently provides a screw driver comprising a tip for engaging the slotted head of a screw, the tip being shaped to engage a captive slot of the screw whereby, in use, rotation of the screw driver retains the tip in engagement with the screw.
A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which: Figure I shows the side view of the head portion of the screw in cross section, demonstrating the dovetail angled channel; Figure 2 details the tip of the screw driver, showing the shaped tip; Figure 3 shows the plan view of the screw head with the screw driver tip in position; Figure 4 shows the forces in action as the new screw driver is turned in combination with the new screw ; Figure 5 shows a cruciform head screw incorporating the same design in plan view; Figure 6 shows a cruciform tip of a screw driver incorporating the same design in plan view with the angled edge indicated by dotted lines; Figure 7 shows the cruciform head screw in plan view with the cruciform tip screw driver in place.
Referring to the drawing, use of the screw Fig I and screw driver Fig 2 combination is exactly the same as any standard screw and screw driver excepting that when both are used together the design negates the need for most of the pushing force that is usually required to keep a screw driver tip in the screw channel. The design aids in both tightening and loosening the screw. The design may be cross-head as shown in Fig 7 or Flat-head as shown in Fig 4.
The tip of the screw driver 4 connects with the head of the screw I by being pushed into the slot and turned in either direction. Upon turning the screw driver, the angled tip engages with the angled slot in the screw head translating turning force into binding force at the point of contact.

Claims (1)

  1. CLAIMS 1. A screw and screw driver set, the screw comprising a threaded portion and a head portion incorporating a captive slot and the screw driver comprising a tip of complementary shape whereby, in use, with the tip in engagement with the captive slot, rotation of the screw driver retains the tip in engagement with the screw.
    2. A screw and screw driver set as described with reference to the accompanying drawings.
    3. A screw comprising a threaded portion and a head portion, which head portion is provided with a captive slot adapted to be engaged, in use, by a complementary shaped tip of a screw driver whereby rotation of the screw driver retains the tip in engagement with the screw.
    4. A screw as described with reference to the accompanying drawings.
    5. A screw driver comprising a tip for engaging the slotted head of a screw, the tip being shaped to engage a captive slot of the screw whereby, in use, rotation of the screw driver retains the tip in engagement with the screw.
    7. A screw driver as described with reference to the accompanying drawings.
GB0023535A 2000-09-26 2000-09-26 Screw head slot which retains a complementary screwdriver Withdrawn GB2367104A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0023535A GB2367104A (en) 2000-09-26 2000-09-26 Screw head slot which retains a complementary screwdriver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0023535A GB2367104A (en) 2000-09-26 2000-09-26 Screw head slot which retains a complementary screwdriver

Publications (2)

Publication Number Publication Date
GB0023535D0 GB0023535D0 (en) 2000-11-08
GB2367104A true GB2367104A (en) 2002-03-27

Family

ID=9900128

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0023535A Withdrawn GB2367104A (en) 2000-09-26 2000-09-26 Screw head slot which retains a complementary screwdriver

Country Status (1)

Country Link
GB (1) GB2367104A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2444066A (en) * 2006-11-21 2008-05-28 Daniel Haines Fastener and driver system
WO2013085756A1 (en) * 2011-12-05 2013-06-13 Robert Jenkins High speed, high torque screw fasteners and drive systems

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1524148A (en) * 1975-11-07 1978-09-06 Briles Mfg Method of forming an undercut slot in a fastener head
US4339971A (en) * 1978-12-13 1982-07-20 Zatorre Alfredo E Fastener and driving tool
GB2112485A (en) * 1980-01-31 1983-07-20 Marvin Bassell Screw driver and screw head system
US4538486A (en) * 1982-11-22 1985-09-03 Jacques Lutrat Non-slip screw
GB2188389A (en) * 1985-11-30 1987-09-30 Clive Alan Newbould Screw driving formations
US5697743A (en) * 1996-10-04 1997-12-16 Parker; Stanley F. Tamper proof threaded fastener
US5722838A (en) * 1990-04-10 1998-03-03 Czegledi; Imre Fastener system and method of manufacture thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1524148A (en) * 1975-11-07 1978-09-06 Briles Mfg Method of forming an undercut slot in a fastener head
US4339971A (en) * 1978-12-13 1982-07-20 Zatorre Alfredo E Fastener and driving tool
GB2112485A (en) * 1980-01-31 1983-07-20 Marvin Bassell Screw driver and screw head system
US4538486A (en) * 1982-11-22 1985-09-03 Jacques Lutrat Non-slip screw
GB2188389A (en) * 1985-11-30 1987-09-30 Clive Alan Newbould Screw driving formations
US5722838A (en) * 1990-04-10 1998-03-03 Czegledi; Imre Fastener system and method of manufacture thereof
US5697743A (en) * 1996-10-04 1997-12-16 Parker; Stanley F. Tamper proof threaded fastener

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2444066A (en) * 2006-11-21 2008-05-28 Daniel Haines Fastener and driver system
WO2008062195A1 (en) * 2006-11-21 2008-05-29 Daniel Haines Fastener system
GB2444066B (en) * 2006-11-21 2009-04-01 Daniel Haines Fastener system
WO2013085756A1 (en) * 2011-12-05 2013-06-13 Robert Jenkins High speed, high torque screw fasteners and drive systems
US8881625B2 (en) 2011-12-05 2014-11-11 Robert Jenkins High speed, high torque screw fasteners and drive systems

Also Published As

Publication number Publication date
GB0023535D0 (en) 2000-11-08

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Legal Events

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