FR891717A - Vis - Google Patents
VisInfo
- 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
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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH562248X | 1941-12-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR891717A true FR891717A (fr) | 1944-03-17 |
Family
ID=4520381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR891717D Expired FR891717A (fr) | 1941-12-09 | 1942-11-09 | Vis |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH225018A (fr) |
| FR (1) | FR891717A (fr) |
| GB (1) | GB562248A (fr) |
Families Citing this family (6)
| 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 (de) * | 1956-06-07 | 1959-05-14 | Kellermann Fa Rudolf | UEberdrehsicherung fuer Kopfschrauben oder Muttern |
| 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 (es) * | 2010-09-10 | 2011-10-05 | Ridelin S.L. | Elemento de apriete para conector eléctrico. |
| JP5870070B2 (ja) * | 2013-07-12 | 2016-02-24 | 日東精工株式会社 | いじり止め駆動穴付き締結具 |
-
1941
- 1941-12-09 CH CH225018D patent/CH225018A/de unknown
-
1942
- 1942-11-09 GB GB15792/42A patent/GB562248A/en not_active Expired
- 1942-11-09 FR FR891717D patent/FR891717A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH225018A (de) | 1942-12-31 |
| GB562248A (en) | 1944-06-23 |
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