CA2277476A1 - Improvements relating to screws and threadforms - Google Patents

Improvements relating to screws and threadforms Download PDF

Info

Publication number
CA2277476A1
CA2277476A1 CA002277476A CA2277476A CA2277476A1 CA 2277476 A1 CA2277476 A1 CA 2277476A1 CA 002277476 A CA002277476 A CA 002277476A CA 2277476 A CA2277476 A CA 2277476A CA 2277476 A1 CA2277476 A1 CA 2277476A1
Authority
CA
Canada
Prior art keywords
threadforms
screws
crest
improvements relating
ridge
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.)
Granted
Application number
CA002277476A
Other languages
French (fr)
Other versions
CA2277476C (en
Inventor
Fotios Papafotiou
David Ian Kershaw
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.)
ACME EQUIPMENT Pty Ltd
Original Assignee
Hanstock Fasteners Pty Limited
Fotios Papafotiou
David Ian Kershaw
Reid Construction Systems Pty Limited
Ajax Cooke Pty Ltd
Acme Equipment Pty 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
Priority claimed from AUPP0264A external-priority patent/AUPP026497A0/en
Priority claimed from AUPP0265A external-priority patent/AUPP026597A0/en
Priority claimed from AUPP4362A external-priority patent/AUPP436298A0/en
Application filed by Hanstock Fasteners Pty Limited, Fotios Papafotiou, David Ian Kershaw, Reid Construction Systems Pty Limited, Ajax Cooke Pty Ltd, Acme Equipment Pty Ltd. filed Critical Hanstock Fasteners Pty Limited
Publication of CA2277476A1 publication Critical patent/CA2277476A1/en
Application granted granted Critical
Publication of CA2277476C publication Critical patent/CA2277476C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/02—Fastening rails, tie-plates, or chairs directly on sleepers or foundations; Means therefor
    • E01B9/04—Fastening on wooden or concrete sleepers or on masonry without clamp members
    • E01B9/10—Screws or bolts for sleepers
    • 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
    • F16B33/00—Features common to bolt and nut
    • F16B33/02—Shape of thread; Special thread-forms

Abstract

A screw thread having a threadform comprising a ridge (21) rising from root (23) to crest (26) with the crest having two peaks (27, 28) separated by a through (29) the depth of which is less than the height of the ridge from root to crest. It has particular use as a screw for timber, and is especially suited to fixing railway rails to sleepers.
CA002277476A 1997-11-10 1998-11-10 Improvements relating to screws and threadforms Expired - Lifetime CA2277476C (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
AUPP0264A AUPP026497A0 (en) 1997-11-10 1997-11-10 Wavelike thread form
AUPP0265A AUPP026597A0 (en) 1997-11-10 1997-11-10 Rail fastener for wooden sleepers
AUPP0265 1997-11-10
AUPP0264 1997-11-10
AUPP4362 1998-06-26
AUPP4362A AUPP436298A0 (en) 1998-06-26 1998-06-26 Improvements relating to screws and threadforms
PCT/AU1998/000933 WO1999024191A1 (en) 1997-11-10 1998-11-10 Improvements relating to screws and threadforms

Publications (2)

Publication Number Publication Date
CA2277476A1 true CA2277476A1 (en) 1999-05-20
CA2277476C CA2277476C (en) 2009-01-13

Family

ID=27158053

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002277476A Expired - Lifetime CA2277476C (en) 1997-11-10 1998-11-10 Improvements relating to screws and threadforms

Country Status (4)

Country Link
EP (1) EP0958072A4 (en)
CA (1) CA2277476C (en)
NZ (1) NZ336714A (en)
WO (1) WO1999024191A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011153619A3 (en) * 2010-06-10 2012-02-02 Grk Canada Limited Screw with dual edge on thread
DE102011078256A1 (en) * 2011-06-29 2013-01-03 Hilti Aktiengesellschaft Screw and method of making a screw thread

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1013335C2 (en) * 1999-10-19 2001-04-23 Nigtevecht Beheer B V Track laying method, using screws fitted into threaded sleeves in rails to set track at desired height
CN102068305B (en) 2009-11-20 2016-01-20 上海微创骨科医疗科技有限公司 Bone screw
RU175953U1 (en) * 2017-05-02 2017-12-25 Дмитрий Витальевич Гвидонский FASTENING DEVICE FOR INTERMEDIATE RAIL FASTENING
RU207161U1 (en) * 2021-05-12 2021-10-14 Публичное акционерное общество «Северсталь» (ПАО «Северсталь») Rail fastening screw

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US422307A (en) * 1890-02-25 libbey
GB548516A (en) * 1941-08-29 1942-10-13 Illinois Tool Works Improvements in screws
US2656740A (en) * 1950-11-20 1953-10-27 Emma G Bedker Method of making thread cutting taps
US3207023A (en) * 1961-12-01 1965-09-21 Illinois Tool Works Screw fastener
US4046051A (en) * 1974-11-14 1977-09-06 Industrial Fasteners Corporation Thread forming screw
US4144795A (en) * 1977-10-20 1979-03-20 Gutshall Charles E Long-pitch re-rolled crest thread
JPS5465252A (en) * 1977-11-04 1979-05-25 Yoshioki Tomoyasu Lock nut* lock bolt and lock screw
EP0682187A3 (en) * 1994-04-13 1996-03-13 Bergner Richard Gmbh Co Method of manufacturing a screw and screw blank for this method.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011153619A3 (en) * 2010-06-10 2012-02-02 Grk Canada Limited Screw with dual edge on thread
US9046121B2 (en) 2010-06-10 2015-06-02 Grk Canada Ltd Screw with dual edge on thread
DE102011078256A1 (en) * 2011-06-29 2013-01-03 Hilti Aktiengesellschaft Screw and method of making a screw thread
US8899898B2 (en) 2011-06-29 2014-12-02 Hilti Aktiengsellschaft Screw method for forming a screw thread

Also Published As

Publication number Publication date
EP0958072A1 (en) 1999-11-24
WO1999024191A1 (en) 1999-05-20
CA2277476C (en) 2009-01-13
EP0958072A4 (en) 2010-06-30
NZ336714A (en) 2001-03-30

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20181113