FR653961A - Unscrewable screw - Google Patents

Unscrewable screw

Info

Publication number
FR653961A
FR653961A FR653961DA FR653961A FR 653961 A FR653961 A FR 653961A FR 653961D A FR653961D A FR 653961DA FR 653961 A FR653961 A FR 653961A
Authority
FR
France
Prior art keywords
unscrewable
screw
unscrewable screw
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.)
Expired
Application number
Other languages
French (fr)
Inventor
Gaston-Emile Simon
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 filed Critical
Application granted granted Critical
Publication of FR653961A publication Critical patent/FR653961A/en
Expired 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
    • F16B23/0076—Specially shaped nuts or heads of bolts or screws for rotations by a tool causing slipping of the tool in loosening rotation, i.e. disabling unscrewing unless another tool is used

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR653961D 1928-05-08 1928-05-08 Unscrewable screw Expired FR653961A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR653961T 1928-05-08

Publications (1)

Publication Number Publication Date
FR653961A true FR653961A (en) 1929-03-29

Family

ID=9006177

Family Applications (1)

Application Number Title Priority Date Filing Date
FR653961D Expired FR653961A (en) 1928-05-08 1928-05-08 Unscrewable screw

Country Status (1)

Country Link
FR (1) FR653961A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658918A (en) * 1985-07-25 1987-04-21 Strata Bit Corporation Threaded nozzle for a drill bit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658918A (en) * 1985-07-25 1987-04-21 Strata Bit Corporation Threaded nozzle for a drill bit

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