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
Other languages
English (en)
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)
GB1234436D 1968-10-08 1968-10-08 Expired GB1234436A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

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

Publications (1)

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

Family

ID=10445608

Family Applications (1)

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

Country Status (1)

Country Link
GB (1) GB1234436A (enrdf_load_stackoverflow)

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 (de) * 1987-12-11 1989-06-22 Southco Eingriffsgesicherte befestigung und werkzeug zur bedienung derselben
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 (de) * 1987-12-11 1998-07-16 Southco Eingriffsgesicherte Befestigung und Werkzeug zur Bedienung derselben
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