FR2403484A1 - Self-locking nut with connected end segment - using shear neck which breaks when predetermined torque is reached - Google Patents

Self-locking nut with connected end segment - using shear neck which breaks when predetermined torque is reached

Info

Publication number
FR2403484A1
FR2403484A1 FR7728290A FR7728290A FR2403484A1 FR 2403484 A1 FR2403484 A1 FR 2403484A1 FR 7728290 A FR7728290 A FR 7728290A FR 7728290 A FR7728290 A FR 7728290A FR 2403484 A1 FR2403484 A1 FR 2403484A1
Authority
FR
France
Prior art keywords
self
breaks
reached
locking nut
connected end
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
FR7728290A
Other languages
French (fr)
Other versions
FR2403484B1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7728290A priority Critical patent/FR2403484A1/en
Publication of FR2403484A1 publication Critical patent/FR2403484A1/en
Application granted granted Critical
Publication of FR2403484B1 publication Critical patent/FR2403484B1/fr
Granted 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
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/284—Locking by means of elastic deformation
    • F16B39/286—Locking by means of elastic deformation caused by saw cuts
    • 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
    • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
    • F16B31/021—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load by means of a frangible part
    • 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
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

The self-locking unit is of the usual hexagonal form but has a deep and narrow circumferential groove (4) at approximately half-way along its thickness. This divides the nut into two segments (1, 2) connected by neck (3) of a predetermined torsional strength. The nut is tightened by applying a spanner to the outer end (2) which is sheared at the required torque. The outer end is still further tightened so that an additional tension is imposed on the bolt and at the same time the irregularities of the sheared surfaces lock the two parts together.
FR7728290A 1977-09-20 1977-09-20 Self-locking nut with connected end segment - using shear neck which breaks when predetermined torque is reached Granted FR2403484A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7728290A FR2403484A1 (en) 1977-09-20 1977-09-20 Self-locking nut with connected end segment - using shear neck which breaks when predetermined torque is reached

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7728290A FR2403484A1 (en) 1977-09-20 1977-09-20 Self-locking nut with connected end segment - using shear neck which breaks when predetermined torque is reached

Publications (2)

Publication Number Publication Date
FR2403484A1 true FR2403484A1 (en) 1979-04-13
FR2403484B1 FR2403484B1 (en) 1980-08-01

Family

ID=9195564

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7728290A Granted FR2403484A1 (en) 1977-09-20 1977-09-20 Self-locking nut with connected end segment - using shear neck which breaks when predetermined torque is reached

Country Status (1)

Country Link
FR (1) FR2403484A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2467312A1 (en) * 1979-10-08 1981-04-17 Boulay Ste Indle Lock nut for screw - has double, internal, hexagonal key drive hole to facilitate complete dismantling
DE3640668A1 (en) * 1985-11-29 1987-06-04 Suiken Technology Daito Kk DOUBLE NUT
US5015132A (en) * 1990-05-15 1991-05-14 J & M Turner Inc. Direct tension indicator washer
US5370483A (en) * 1993-06-24 1994-12-06 J & M Turner, Inc. Direct tension indicator washer
US5658017A (en) * 1995-10-03 1997-08-19 Chirehdast; Mehran Tube nut torque limiting method and apparatus
US5667346A (en) * 1996-02-06 1997-09-16 F. Jonathan M. Turner Direct tension indicator washer
DE102005058553A1 (en) * 2005-12-08 2007-06-21 Zf Friedrichshafen Ag Piston attachment at shock-mount e.g. for shock mount, has piston rod having mounting threads for pistons and piston has piston nut which intervenes and fixed in mounting thread
CN105757105A (en) * 2016-04-11 2016-07-13 海盐汇联通用配件有限公司 Multifunctional connecting member

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR668191A (en) * 1928-12-29 1929-10-29 clamping nut
FR1490954A (en) * 1965-09-01 1967-08-04 threaded nut
FR2017648A1 (en) * 1968-09-09 1970-05-22 Vaughn Rudolph

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR668191A (en) * 1928-12-29 1929-10-29 clamping nut
FR1490954A (en) * 1965-09-01 1967-08-04 threaded nut
FR2017648A1 (en) * 1968-09-09 1970-05-22 Vaughn Rudolph

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2467312A1 (en) * 1979-10-08 1981-04-17 Boulay Ste Indle Lock nut for screw - has double, internal, hexagonal key drive hole to facilitate complete dismantling
DE3640668A1 (en) * 1985-11-29 1987-06-04 Suiken Technology Daito Kk DOUBLE NUT
US4729703A (en) * 1985-11-29 1988-03-08 Kabushiki Kaisha Suiken Technology Double nut
US5015132A (en) * 1990-05-15 1991-05-14 J & M Turner Inc. Direct tension indicator washer
US5370483A (en) * 1993-06-24 1994-12-06 J & M Turner, Inc. Direct tension indicator washer
US5487632A (en) * 1993-06-24 1996-01-30 J & M Turner, Inc. Direct tension indicator washer
US5658017A (en) * 1995-10-03 1997-08-19 Chirehdast; Mehran Tube nut torque limiting method and apparatus
US5667346A (en) * 1996-02-06 1997-09-16 F. Jonathan M. Turner Direct tension indicator washer
DE102005058553A1 (en) * 2005-12-08 2007-06-21 Zf Friedrichshafen Ag Piston attachment at shock-mount e.g. for shock mount, has piston rod having mounting threads for pistons and piston has piston nut which intervenes and fixed in mounting thread
CN105757105A (en) * 2016-04-11 2016-07-13 海盐汇联通用配件有限公司 Multifunctional connecting member

Also Published As

Publication number Publication date
FR2403484B1 (en) 1980-08-01

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Legal Events

Date Code Title Description
ST Notification of lapse