DE131445C - - Google Patents

Info

Publication number
DE131445C
DE131445C DENDAT131445D DE131445DA DE131445C DE 131445 C DE131445 C DE 131445C DE NDAT131445 D DENDAT131445 D DE NDAT131445D DE 131445D A DE131445D A DE 131445DA DE 131445 C DE131445 C DE 131445C
Authority
DE
Germany
Prior art keywords
screw
screwdriver
sharp
head
projections
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.)
Active
Application number
DENDAT131445D
Other languages
German (de)
English (en)
Publication of DE131445C publication Critical patent/DE131445C/de
Active 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)
  • Closures For Containers (AREA)
DENDAT131445D Active DE131445C (ko)

Publications (1)

Publication Number Publication Date
DE131445C true DE131445C (ko)

Family

ID=399771

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT131445D Active DE131445C (ko)

Country Status (1)

Country Link
DE (1) DE131445C (ko)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2743399A1 (fr) * 1996-01-10 1997-07-11 Caillau Ets Vis munie d'une tete a sens unique de rotation
DE19955438A1 (de) * 1999-11-18 2001-06-13 Klappstein Kurt SHS Holz und Eisenschrauben
DE202010003562U1 (de) 2009-09-11 2011-01-20 Flaig, Hartmut Gewindeelement sowie Werkzeug
WO2011029591A1 (de) 2009-09-11 2011-03-17 Hartmut Flaig Gewindeelement sowie werkzeug
EP2430267A1 (en) * 2009-05-15 2012-03-21 Gordon C. Tang Easily installed and non-defacing security latch

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2743399A1 (fr) * 1996-01-10 1997-07-11 Caillau Ets Vis munie d'une tete a sens unique de rotation
DE19955438A1 (de) * 1999-11-18 2001-06-13 Klappstein Kurt SHS Holz und Eisenschrauben
EP2430267A1 (en) * 2009-05-15 2012-03-21 Gordon C. Tang Easily installed and non-defacing security latch
EP2430267A4 (en) * 2009-05-15 2014-10-01 Gordon C Tang SAFETY LATCH DOES NOT DETERIORATE AND EASY TO INSTALL
DE202010003562U1 (de) 2009-09-11 2011-01-20 Flaig, Hartmut Gewindeelement sowie Werkzeug
WO2011029591A1 (de) 2009-09-11 2011-03-17 Hartmut Flaig Gewindeelement sowie werkzeug
DE202010003562U9 (de) 2009-09-11 2012-01-12 Hartmut Flaig Gewindeelement sowie Werkzeug

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