FR2457139A2 - Hollow bolt or screw head - may be worked hot or cold and has central cavity with external wall with segments - Google Patents

Hollow bolt or screw head - may be worked hot or cold and has central cavity with external wall with segments

Info

Publication number
FR2457139A2
FR2457139A2 FR7915321A FR7915321A FR2457139A2 FR 2457139 A2 FR2457139 A2 FR 2457139A2 FR 7915321 A FR7915321 A FR 7915321A FR 7915321 A FR7915321 A FR 7915321A FR 2457139 A2 FR2457139 A2 FR 2457139A2
Authority
FR
France
Prior art keywords
segments
central cavity
cold
screw head
external wall
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.)
Pending
Application number
FR7915321A
Other languages
French (fr)
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.)
BADRE EMILE
Original Assignee
BADRE EMILE
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 FR7900137A external-priority patent/FR2445743A1/en
Application filed by BADRE EMILE filed Critical BADRE EMILE
Priority to FR7915321A priority Critical patent/FR2457139A2/en
Publication of FR2457139A2 publication Critical patent/FR2457139A2/en
Pending 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/44—Making machine elements bolts, studs, or the like
    • B21K1/46—Making machine elements bolts, studs, or the like with heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/44—Making machine elements bolts, studs, or the like
    • B21K1/46—Making machine elements bolts, studs, or the like with heads
    • B21K1/463—Making machine elements bolts, studs, or the like with heads with recessed heads

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

The screw head has a central cavity (3) which is bounded by a wall (19). The wall may be made up of circular segments. The segments have a height which is lower than the main head (1). The wall may also have another profile. The head may have a square section (2). The shapes may be formed by hot or cold working, and may be formed in a head or in a central cavity within a block.
FR7915321A 1979-01-04 1979-05-25 Hollow bolt or screw head - may be worked hot or cold and has central cavity with external wall with segments Pending FR2457139A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7915321A FR2457139A2 (en) 1979-01-04 1979-05-25 Hollow bolt or screw head - may be worked hot or cold and has central cavity with external wall with segments

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7900137A FR2445743A1 (en) 1979-01-04 1979-01-04 Drop-forging process for forming bolt heads - uses blind hole in matrix or punch to centre billet during pressing thus eliminating burrs
FR7915321A FR2457139A2 (en) 1979-01-04 1979-05-25 Hollow bolt or screw head - may be worked hot or cold and has central cavity with external wall with segments

Publications (1)

Publication Number Publication Date
FR2457139A2 true FR2457139A2 (en) 1980-12-19

Family

ID=26220949

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7915321A Pending FR2457139A2 (en) 1979-01-04 1979-05-25 Hollow bolt or screw head - may be worked hot or cold and has central cavity with external wall with segments

Country Status (1)

Country Link
FR (1) FR2457139A2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832970A (en) * 1954-10-04 1958-05-06 Camcar Screw & Mfg Corp Single blow heading machine with two part header punch
FR1348113A (en) * 1963-02-11 1964-01-04 Illinois Tool Works Method and apparatus for forming the head of a tie rod
US3151519A (en) * 1960-10-26 1964-10-06 Res Engineering And Mfg Inc Screw head recess, method of making the same, and punch for use therein
US3324491A (en) * 1965-02-02 1967-06-13 Illinois Tool Works Method and apparatus for heading rotary fasteners
FR2213118A1 (en) * 1972-11-21 1974-08-02 Utility Products Ltd

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832970A (en) * 1954-10-04 1958-05-06 Camcar Screw & Mfg Corp Single blow heading machine with two part header punch
US3151519A (en) * 1960-10-26 1964-10-06 Res Engineering And Mfg Inc Screw head recess, method of making the same, and punch for use therein
FR1348113A (en) * 1963-02-11 1964-01-04 Illinois Tool Works Method and apparatus for forming the head of a tie rod
US3324491A (en) * 1965-02-02 1967-06-13 Illinois Tool Works Method and apparatus for heading rotary fasteners
FR2213118A1 (en) * 1972-11-21 1974-08-02 Utility Products Ltd

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