FR1115146A - Further training in cross recessed screws and conjugate screwdrivers - Google Patents

Further training in cross recessed screws and conjugate screwdrivers

Info

Publication number
FR1115146A
FR1115146A FR1115146DA FR1115146A FR 1115146 A FR1115146 A FR 1115146A FR 1115146D A FR1115146D A FR 1115146DA FR 1115146 A FR1115146 A FR 1115146A
Authority
FR
France
Prior art keywords
screwdrivers
conjugate
further training
cross recessed
recessed screws
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
Andre-Gabriel Lafleur
Adrien Marechal
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 FR1115146A publication Critical patent/FR1115146A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B15/00—Screwdrivers
    • B25B15/001—Screwdrivers characterised by material or shape of the tool bit
    • B25B15/004—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
    • B25B15/005—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section with cross- or star-shaped cross-section
    • 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
    • F16B23/0023—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 substantially cross-shaped

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR1115146D 1954-11-27 1954-11-27 Further training in cross recessed screws and conjugate screwdrivers Expired FR1115146A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1115146T 1954-11-27

Publications (1)

Publication Number Publication Date
FR1115146A true FR1115146A (en) 1956-04-19

Family

ID=9628792

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1115146D Expired FR1115146A (en) 1954-11-27 1954-11-27 Further training in cross recessed screws and conjugate screwdrivers

Country Status (1)

Country Link
FR (1) FR1115146A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2808862A (en) * 1956-07-02 1957-10-08 Woodrow Simkins Magnetic screwdriver bit
EP0474614A2 (en) * 1990-09-05 1992-03-11 Sandvik Aktiebolag Screw and screwdriver therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2808862A (en) * 1956-07-02 1957-10-08 Woodrow Simkins Magnetic screwdriver bit
EP0474614A2 (en) * 1990-09-05 1992-03-11 Sandvik Aktiebolag Screw and screwdriver therefor
EP0474614A3 (en) * 1990-09-05 1993-05-26 Sandvik Aktiebolag Screw and screwdriver therefor

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