FR2439327A1 - Head for machine screw - has steps cut into conical under face face to distribute load - Google Patents

Head for machine screw - has steps cut into conical under face face to distribute load

Info

Publication number
FR2439327A1
FR2439327A1 FR7829924A FR7829924A FR2439327A1 FR 2439327 A1 FR2439327 A1 FR 2439327A1 FR 7829924 A FR7829924 A FR 7829924A FR 7829924 A FR7829924 A FR 7829924A FR 2439327 A1 FR2439327 A1 FR 2439327A1
Authority
FR
France
Prior art keywords
steps
face
head
machine screw
distribute load
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
FR7829924A
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.)
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 FR7829924A priority Critical patent/FR2439327A1/en
Priority to IT69045/79A priority patent/IT1119246B/en
Publication of FR2439327A1 publication Critical patent/FR2439327A1/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
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
    • F16B35/06—Specially-shaped heads

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)

Abstract

The screw has a threaded shank. Its head has a conical base with a cylindrical upper section, recessed for polygonal shaped key. Steps are machined around the circumference of the conical base, and these mate with similar steps cut with a milling tool into the upper piece of material, being clamped. The dias. of the steps are arranged to allow a clearance. This arrangement of steps gives reduced friction, increases clamping strength, distributes clamping forces reduces rupture, and gives a locking action.
FR7829924A 1978-10-20 1978-10-20 Head for machine screw - has steps cut into conical under face face to distribute load Pending FR2439327A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7829924A FR2439327A1 (en) 1978-10-20 1978-10-20 Head for machine screw - has steps cut into conical under face face to distribute load
IT69045/79A IT1119246B (en) 1978-10-20 1979-10-19 SCREW OR SIMILAR FIXING ORGAN

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7829924A FR2439327A1 (en) 1978-10-20 1978-10-20 Head for machine screw - has steps cut into conical under face face to distribute load

Publications (1)

Publication Number Publication Date
FR2439327A1 true FR2439327A1 (en) 1980-05-16

Family

ID=9213986

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7829924A Pending FR2439327A1 (en) 1978-10-20 1978-10-20 Head for machine screw - has steps cut into conical under face face to distribute load

Country Status (2)

Country Link
FR (1) FR2439327A1 (en)
IT (1) IT1119246B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111373604A (en) * 2017-09-07 2020-07-03 迪特尔·拉姆绍尔 Grounding countersunk head bolt with section type knife edge

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR668663A (en) * 1929-01-30 1929-11-05 Head for unscrewing screws, screwdriver for use with this head and method for leveling the gripping members of said head
US2199809A (en) * 1938-02-15 1940-05-07 Pacific Coast Forge Company Bolt head construction
FR1355340A (en) * 1962-05-07 1964-03-13 Gen American Transformation Co Wall panel assembly screws
US3322019A (en) * 1964-07-28 1967-05-30 Screw & Bolt Corp Of America Plasterboard screw
FR1484141A (en) * 1965-07-28 1967-06-09 Bauer & Schaurte Countersunk bolt with nut
FR2165367A5 (en) * 1971-12-15 1973-08-03 Penn Engineering Manuf

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR668663A (en) * 1929-01-30 1929-11-05 Head for unscrewing screws, screwdriver for use with this head and method for leveling the gripping members of said head
US2199809A (en) * 1938-02-15 1940-05-07 Pacific Coast Forge Company Bolt head construction
FR1355340A (en) * 1962-05-07 1964-03-13 Gen American Transformation Co Wall panel assembly screws
US3322019A (en) * 1964-07-28 1967-05-30 Screw & Bolt Corp Of America Plasterboard screw
FR1484141A (en) * 1965-07-28 1967-06-09 Bauer & Schaurte Countersunk bolt with nut
FR2165367A5 (en) * 1971-12-15 1973-08-03 Penn Engineering Manuf

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111373604A (en) * 2017-09-07 2020-07-03 迪特尔·拉姆绍尔 Grounding countersunk head bolt with section type knife edge

Also Published As

Publication number Publication date
IT7969045A0 (en) 1979-10-19
IT1119246B (en) 1986-03-03

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