GB1446437A - Screws - Google Patents

Screws

Info

Publication number
GB1446437A
GB1446437A GB5789072A GB5789072A GB1446437A GB 1446437 A GB1446437 A GB 1446437A GB 5789072 A GB5789072 A GB 5789072A GB 5789072 A GB5789072 A GB 5789072A GB 1446437 A GB1446437 A GB 1446437A
Authority
GB
United Kingdom
Prior art keywords
head
shank
dec
socket
screw
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
GB5789072A
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.)
GKN UK Investments Ltd
Original Assignee
Fredk Mountford Birmingham Ltd
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 Fredk Mountford Birmingham Ltd filed Critical Fredk Mountford Birmingham Ltd
Priority to GB5789072A priority Critical patent/GB1446437A/en
Publication of GB1446437A publication Critical patent/GB1446437A/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
    • 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
    • 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
    • F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
    • F16B41/005—Measures against unauthorised operation of bolts, nuts or pins

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Tyre Moulding (AREA)

Abstract

1446437 Socket spanners FREDERICK MOUNTFORD (BIRMINGHAM) Ltd 7 Dec 1973 [15 Dec 1972] 57890/72 Heading B3N [Also in Division F2] A hand tool to turn a tamper-resistant screw the head of which has a plan form with outwardly convex sides 12, 13 which intersect at positions 14 lying at the corners of a polygon, e.g. a rectangle or a pentagon, the sides curving inwardly towards the axis of the shank as they extend away from the shank to form a generally domed head with a smooth continuous surface, has a socket complementary in shape to the screw head, and has a slight clearance fit on the head.
GB5789072A 1972-12-15 1972-12-15 Screws Expired GB1446437A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5789072A GB1446437A (en) 1972-12-15 1972-12-15 Screws

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5789072A GB1446437A (en) 1972-12-15 1972-12-15 Screws

Publications (1)

Publication Number Publication Date
GB1446437A true GB1446437A (en) 1976-08-18

Family

ID=10480292

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5789072A Expired GB1446437A (en) 1972-12-15 1972-12-15 Screws

Country Status (1)

Country Link
GB (1) GB1446437A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2680904A1 (en) * 1991-08-30 1993-03-05 Escoffier Gentile Philippe Anti-theft device for marking and tamper-proof identification of equipment
US5401133A (en) * 1993-09-16 1995-03-28 Wildeck, Inc. Security washer for security paneling system
GB2293404A (en) * 1994-05-20 1996-03-27 Malcolm J Holland Driveable screw eye or hook
WO1998050706A1 (en) * 1997-05-02 1998-11-12 Sfs Industrie Holding Ag Screw
AU734237B3 (en) * 1997-05-02 2001-06-07 Sfs Industrie Holding Ag Screw
CN103090115A (en) * 2011-10-27 2013-05-08 航天精工有限公司 Method and structure for quickly fixing hoop
EP2737221A4 (en) * 2011-07-27 2015-05-20 Safecar Theft Prevention Systems Ltd Tamper proof fastening mechanism and fastener

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2680904A1 (en) * 1991-08-30 1993-03-05 Escoffier Gentile Philippe Anti-theft device for marking and tamper-proof identification of equipment
US5401133A (en) * 1993-09-16 1995-03-28 Wildeck, Inc. Security washer for security paneling system
GB2293404A (en) * 1994-05-20 1996-03-27 Malcolm J Holland Driveable screw eye or hook
WO1998050706A1 (en) * 1997-05-02 1998-11-12 Sfs Industrie Holding Ag Screw
US6164887A (en) * 1997-05-02 2000-12-26 Sfs Industrie Holding Ag Screw for joining thin workpieces
AU729399B2 (en) * 1997-05-02 2001-02-01 Sfs Industrie Holding Ag Screw
AU734237B3 (en) * 1997-05-02 2001-06-07 Sfs Industrie Holding Ag Screw
CN1088503C (en) * 1997-05-02 2002-07-31 Sfs工业控股公司 Screw
EP2737221A4 (en) * 2011-07-27 2015-05-20 Safecar Theft Prevention Systems Ltd Tamper proof fastening mechanism and fastener
CN103090115A (en) * 2011-10-27 2013-05-08 航天精工有限公司 Method and structure for quickly fixing hoop
CN103090115B (en) * 2011-10-27 2015-01-07 航天精工有限公司 Method and structure for quickly fixing hoop

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee