FR2434952A1 - Irremovable screws for anti-theft devices - have hexagonal recesses in heads filled with hexagonal plugs - Google Patents
Irremovable screws for anti-theft devices - have hexagonal recesses in heads filled with hexagonal plugsInfo
- Publication number
- FR2434952A1 FR2434952A1 FR7822342A FR7822342A FR2434952A1 FR 2434952 A1 FR2434952 A1 FR 2434952A1 FR 7822342 A FR7822342 A FR 7822342A FR 7822342 A FR7822342 A FR 7822342A FR 2434952 A1 FR2434952 A1 FR 2434952A1
- Authority
- FR
- France
- Prior art keywords
- hexagonal
- screws
- irremovable
- screw
- plugs
- 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.)
- Withdrawn
Links
- 239000002184 metal Substances 0.000 abstract 1
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
- F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
- F16B41/005—Measures against unauthorised operation of bolts, nuts or pins
-
- 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
- F16B37/00—Nuts or like thread-engaging members
- F16B37/14—Cap nuts; Nut caps or bolt caps
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dowels (AREA)
Abstract
The screw for an anti-theft device, can be made irremovable. The screw (1) has a round head (3) with hexagonal recess (4). The screw (1) is fitted into a counterbored hole so that the head (3) is flush with the surface. A hexagonal plug (5) which is a force fit in the recess (4) is driven into it with a hammer so that the plug (5) is flush with the surface of the head (3). The principle can be applied to screws with slotted heads by driving a matching piece of metal into the screw-driver slot.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7822342A FR2434952A1 (en) | 1978-07-28 | 1978-07-28 | Irremovable screws for anti-theft devices - have hexagonal recesses in heads filled with hexagonal plugs |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7822342A FR2434952A1 (en) | 1978-07-28 | 1978-07-28 | Irremovable screws for anti-theft devices - have hexagonal recesses in heads filled with hexagonal plugs |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2434952A1 true FR2434952A1 (en) | 1980-03-28 |
Family
ID=9211293
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7822342A Withdrawn FR2434952A1 (en) | 1978-07-28 | 1978-07-28 | Irremovable screws for anti-theft devices - have hexagonal recesses in heads filled with hexagonal plugs |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2434952A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2576646A1 (en) * | 1985-01-30 | 1986-08-01 | Bridoire Produits Trefiles | Method for making an assembly screw undismountable |
FR2591413A1 (en) * | 1985-12-09 | 1987-06-12 | Legrand Sa | Plug seal, especially for an explosion-proof enclosure |
EP0237595A1 (en) * | 1986-03-18 | 1987-09-23 | Eduard Schneider | Security screw for inseparable assemblies |
FR2724993A1 (en) * | 1994-09-27 | 1996-03-29 | Mecelec Ind | Non-slackening nut e.g. for public equipment |
WO2004016886A2 (en) * | 2002-08-15 | 2004-02-26 | Proac Aps | A safety box for storing personal valuables, a safety anchor for securing the safety box and safety fasteners for securing a variety of other objects |
DE102010005861A1 (en) * | 2010-01-26 | 2011-07-28 | Klincker, Jörg, 24850 | Screw locking device for anti theft device, has filling lock for inserting pin into hollow screw heads, safety ring for rounding of outer edge screws, and safety cover for imposing half moon shaped caps with angular outer edge screws |
DE202015005737U1 (en) * | 2015-08-10 | 2015-09-17 | Rolf-Peter Busse | Device for locking hexagon socket screws by means of a press-fit bush |
CN112727899A (en) * | 2021-01-18 | 2021-04-30 | 惠州市益珉金属科技有限公司 | Self-destruction screw |
-
1978
- 1978-07-28 FR FR7822342A patent/FR2434952A1/en not_active Withdrawn
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2576646A1 (en) * | 1985-01-30 | 1986-08-01 | Bridoire Produits Trefiles | Method for making an assembly screw undismountable |
FR2591413A1 (en) * | 1985-12-09 | 1987-06-12 | Legrand Sa | Plug seal, especially for an explosion-proof enclosure |
EP0237595A1 (en) * | 1986-03-18 | 1987-09-23 | Eduard Schneider | Security screw for inseparable assemblies |
FR2724993A1 (en) * | 1994-09-27 | 1996-03-29 | Mecelec Ind | Non-slackening nut e.g. for public equipment |
WO2004016886A2 (en) * | 2002-08-15 | 2004-02-26 | Proac Aps | A safety box for storing personal valuables, a safety anchor for securing the safety box and safety fasteners for securing a variety of other objects |
WO2004016886A3 (en) * | 2002-08-15 | 2004-03-25 | Proac Aps | A safety box for storing personal valuables, a safety anchor for securing the safety box and safety fasteners for securing a variety of other objects |
DE102010005861A1 (en) * | 2010-01-26 | 2011-07-28 | Klincker, Jörg, 24850 | Screw locking device for anti theft device, has filling lock for inserting pin into hollow screw heads, safety ring for rounding of outer edge screws, and safety cover for imposing half moon shaped caps with angular outer edge screws |
DE202015005737U1 (en) * | 2015-08-10 | 2015-09-17 | Rolf-Peter Busse | Device for locking hexagon socket screws by means of a press-fit bush |
CN112727899A (en) * | 2021-01-18 | 2021-04-30 | 惠州市益珉金属科技有限公司 | Self-destruction screw |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |