GB1234436A - - Google Patents

Info

Publication number
GB1234436A
GB1234436A GB1234436DA GB1234436A GB 1234436 A GB1234436 A GB 1234436A GB 1234436D A GB1234436D A GB 1234436DA GB 1234436 A GB1234436 A GB 1234436A
Authority
GB
United Kingdom
Prior art keywords
screw
screw driver
heading
fasteners
aug
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.)
Expired
Application number
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 filed Critical
Publication of GB1234436A publication Critical patent/GB1234436A/en
Expired 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
    • F16B23/0038—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 prismatic with up to six edges, e.g. triangular, square, pentagonal, Allen-type cross-sections

Landscapes

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

Abstract

1,234,436. Screw drivers. G.K.N. SCREWS & FASTENERS Ltd. 26 Aug., 1969 [8 Oct., 1968], No. 47611/68. Heading B3N. [Also in Division F2] A screw driver comprises an axially extending peg, the cross-section of which is either an equilateral triangle or a triangular shape bounded by three arcuate sides, thus enabling the screw driver to rotate a screw having a correspondingly shaped recess in its head.
GB1234436D 1968-10-08 1968-10-08 Expired GB1234436A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4761168 1968-10-08

Publications (1)

Publication Number Publication Date
GB1234436A true GB1234436A (en) 1971-06-03

Family

ID=10445608

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1234436D Expired GB1234436A (en) 1968-10-08 1968-10-08

Country Status (1)

Country Link
GB (1) GB1234436A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2142566A (en) * 1983-05-23 1985-01-23 John Galbraith Screw fasteners
US4827811A (en) * 1987-12-11 1989-05-09 Southco, Inc. Tamper-resistant fastener and tool for operating same
US5957645A (en) * 1997-10-31 1999-09-28 Phillips Screw Company Spiral drive system for threaded fasteners
US8182187B2 (en) 2008-04-21 2012-05-22 Asia Fastening (Us), Inc. Drive system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2142566A (en) * 1983-05-23 1985-01-23 John Galbraith Screw fasteners
US4827811A (en) * 1987-12-11 1989-05-09 Southco, Inc. Tamper-resistant fastener and tool for operating same
DE3822831A1 (en) * 1987-12-11 1989-06-22 Southco Tamper-proof fastening and tool for operating the same
GB2213546A (en) * 1987-12-11 1989-08-16 Southco Tamper-resistant fastener and tool for same
GB2213546B (en) * 1987-12-11 1992-02-19 Southco Tamper resistant fastener and tool for operating same
DE3822831C2 (en) * 1987-12-11 1998-07-16 Southco Tamper-proof fastening and tools for operating the same
US5957645A (en) * 1997-10-31 1999-09-28 Phillips Screw Company Spiral drive system for threaded fasteners
US6234914B1 (en) 1997-10-31 2001-05-22 Phillips Screw Company Punch for forming threaded fasteners with spiral drive
US6367358B1 (en) 1997-10-31 2002-04-09 Phillips Screw Company Driver for threaded fasteners with spiral drive
US8182187B2 (en) 2008-04-21 2012-05-22 Asia Fastening (Us), Inc. Drive system

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees