NZ336714A - Screw thread having a ridge with two peaks separated by a trough - Google Patents

Screw thread having a ridge with two peaks separated by a trough

Info

Publication number
NZ336714A
NZ336714A NZ336714A NZ33671498A NZ336714A NZ 336714 A NZ336714 A NZ 336714A NZ 336714 A NZ336714 A NZ 336714A NZ 33671498 A NZ33671498 A NZ 33671498A NZ 336714 A NZ336714 A NZ 336714A
Authority
NZ
New Zealand
Prior art keywords
ridge
trough
screw thread
screw
thread
Prior art date
Application number
NZ336714A
Inventor
Fotios Papafotiou
David Ian Kershaw
Original Assignee
Reid Construction Systems Pty
Hanstock Fasteners 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 AUPP0265A external-priority patent/AUPP026597A0/en
Priority claimed from AUPP0264A external-priority patent/AUPP026497A0/en
Priority claimed from AUPP4362A external-priority patent/AUPP436298A0/en
Application filed by Reid Construction Systems Pty, Hanstock Fasteners Pty Ltd filed Critical Reid Construction Systems Pty
Publication of NZ336714A publication Critical patent/NZ336714A/en

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forging (AREA)
  • Machines For Laying And Maintaining Railways (AREA)

Abstract

A screw thread having a twin start helical thread configuration consisting of two ridges 12 and 13 of equal height helically winding around a core 19. The thread is continuous for its length on the screw. The crest of each ridge 21 and 31 carries a pair of peaks along its length and is separated by a trough 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.
NZ336714A 1997-11-10 1998-11-10 Screw thread having a ridge with two peaks separated by a trough NZ336714A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPP0265A AUPP026597A0 (en) 1997-11-10 1997-11-10 Rail fastener for wooden sleepers
AUPP0264A AUPP026497A0 (en) 1997-11-10 1997-11-10 Wavelike thread form
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 (1)

Publication Number Publication Date
NZ336714A true NZ336714A (en) 2001-03-30

Family

ID=27158053

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ336714A NZ336714A (en) 1997-11-10 1998-11-10 Screw thread having a ridge with two peaks separated by a trough

Country Status (4)

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

Families Citing this family (6)

* 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
CA2707410C (en) 2010-06-10 2013-09-24 Walther, Uli Screw with dual edge on thread
DE102011078256A1 (en) * 2011-06-29 2013-01-03 Hilti Aktiengesellschaft Screw and method of making a screw thread
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.

Also Published As

Publication number Publication date
CA2277476A1 (en) 1999-05-20
EP0958072A4 (en) 2010-06-30
CA2277476C (en) 2009-01-13
EP0958072A1 (en) 1999-11-24
WO1999024191A1 (en) 1999-05-20

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Legal Events

Date Code Title Description
PSEA Patent sealed
RENW Renewal (renewal fees accepted)
ASS Change of ownership

Owner name: AJAX COOKE PTY LTD, AU

Free format text: OLD OWNER(S): AJAX COOKE PTY LTD; REID CONSTRUCTION SYSTEMS PTY LTD; HANSTOCK FASTENERS PTY LTD

RENW Renewal (renewal fees accepted)
RENW Renewal (renewal fees accepted)
RENW Renewal (renewal fees accepted)
EXPY Patent expired