FR891717A - Screw - Google Patents

Screw

Info

Publication number
FR891717A
FR891717A FR891717DA FR891717A FR 891717 A FR891717 A FR 891717A FR 891717D A FR891717D A FR 891717DA FR 891717 A FR891717 A FR 891717A
Authority
FR
France
Prior art keywords
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)
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.)
Sulzer AG
Original Assignee
Sulzer AG
Sulzer Freres SA
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 Sulzer AG, Sulzer Freres SA filed Critical Sulzer AG
Application granted granted Critical
Publication of FR891717A publication Critical patent/FR891717A/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)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
FR891717D 1941-12-09 1942-11-09 Screw Expired FR891717A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH562248X 1941-12-09

Publications (1)

Publication Number Publication Date
FR891717A true FR891717A (en) 1944-03-17

Family

ID=4520381

Family Applications (1)

Application Number Title Priority Date Filing Date
FR891717D Expired FR891717A (en) 1941-12-09 1942-11-09 Screw

Country Status (3)

Country Link
CH (1) CH225018A (en)
FR (1) FR891717A (en)
GB (1) GB562248A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2777353A (en) * 1952-10-30 1957-01-15 Robert W Willis Screw socket construction having tool guiding means formed therein
DE1057395B (en) * 1956-06-07 1959-05-14 Kellermann Fa Rudolf Over-rotation protection for head screws or nuts
US4125051A (en) * 1977-06-09 1978-11-14 Illinois Tool Works Inc. Tamperproof fastener
GB2149872A (en) * 1983-11-17 1985-06-19 Peter John Gill Tamper resistant fasteners
ES2353182B1 (en) * 2010-09-10 2011-10-05 Ridelin S.L. TIGHTENING ELEMENT FOR ELECTRICAL CONNECTOR.
JP5870070B2 (en) * 2013-07-12 2016-02-24 日東精工株式会社 Fastener with tamper-proof drive hole

Also Published As

Publication number Publication date
CH225018A (en) 1942-12-31
GB562248A (en) 1944-06-23

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