WO2021015666A1 - Joint à boulon électronique - Google Patents

Joint à boulon électronique Download PDF

Info

Publication number
WO2021015666A1
WO2021015666A1 PCT/SG2019/050361 SG2019050361W WO2021015666A1 WO 2021015666 A1 WO2021015666 A1 WO 2021015666A1 SG 2019050361 W SG2019050361 W SG 2019050361W WO 2021015666 A1 WO2021015666 A1 WO 2021015666A1
Authority
WO
WIPO (PCT)
Prior art keywords
bolt
lock body
tip
shaft
seal
Prior art date
Application number
PCT/SG2019/050361
Other languages
English (en)
Inventor
Andrew Gerald Lynn Brown
Original Assignee
Cathay Seal Pte. Ltd.
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 Cathay Seal Pte. Ltd. filed Critical Cathay Seal Pte. Ltd.
Priority to PCT/SG2019/050361 priority Critical patent/WO2021015666A1/fr
Publication of WO2021015666A1 publication Critical patent/WO2021015666A1/fr

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F3/03—Forms or constructions of security seals
    • G09F3/0305—Forms or constructions of security seals characterised by the type of seal used
    • G09F3/0317—Forms or constructions of security seals characterised by the type of seal used having bolt like sealing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07798—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card part of the antenna or the integrated circuit being adapted for rupturing or breaking, e.g. record carriers functioning as sealing devices for detecting not-authenticated opening of containers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F3/03—Forms or constructions of security seals
    • G09F3/0305—Forms or constructions of security seals characterised by the type of seal used
    • G09F3/0329—Forms or constructions of security seals characterised by the type of seal used having electronic sealing means
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F3/03—Forms or constructions of security seals
    • G09F3/0305—Forms or constructions of security seals characterised by the type of seal used
    • G09F3/0329—Forms or constructions of security seals characterised by the type of seal used having electronic sealing means
    • G09F3/0335—Forms or constructions of security seals characterised by the type of seal used having electronic sealing means using RFID tags

Definitions

  • This invention relates to an electronic bolt seal, and in particular, to a tamper-evident electronic bolt seal particularly suited for one-time locking of the door(s) of the cargo space in intermodal containers, trucks, rail cars and the like.
  • Bolt seals are a type of locking device currently used to lock the doors of the cargo space in intermodal containers, trucks and trailers that are used to transport goods, as a way of preventing pilferage and to allow quick visual determination of when tampering has occurred.
  • Bolt seals typically comprise a bolt that is assembled with a lock body. In use, the bolt is passed through one or more staples or locking bodies provided on the door(s) and or frame of the cargo space and inserted into the lock body. Once the bolt and the lock body have been assembled to seal the door(s), the bolt and the lock the bolt cannot be easily separated. In order to open the sealed door(s), the bolt has to be cut with a bolt cutter, thereby destroying the bolt seal.
  • Bolt seals are thus configured to be one-time use locking devices.
  • bolt seals may be required to be ISO 17712 certified and/or C-TPAT compliant, having a tensile strength of over 2000kg and a special bolt cutter to break the bolt.
  • some bolt seals are provided with electronic tamper detection by storing shipment specific data that can be remotely read by a reader only when the bolt and lock body have been assembled in use.
  • such bolt seals may incorporate wireless communication (e.g. Radio Frequency Identification) technology by providing a wireless communication chip in the bolt and an antenna in the lock body. Assembly of the bolt with the lock body places the wireless communication chip in electrical connection with the antenna to allow data transmission to a wireless communication reader that is within range of the bolt seal.
  • the bolt and lock body are typically both provided with electrically conductive portions that come into electrical contact only when the lock body and bolt are assembled in use, the electrical contact being broken when the bolt is cut or withdrawn from the lock body.
  • the bolt and lock body of some existing bolt seals can be forcibly separated without apparent destruction to the bolt or lock body, for example, in certain cases, by effecting relatively high speed relative rotation between the bolt and the lock body together with application of an axial separating force.
  • This has allowed the sealed door(s) of the cargo space to be opened and the goods therein consequently stolen or replaced with other (e.g. counterfeit) items, followed by subsequent reassembly of the bolt with the lock body to effect the appearance of an intact bolt seal.
  • an apparently sealed cargo space may actually have been subject to unauthorized access without anyone’s knowledge.
  • an electronic bolt seal comprising: a bolt comprising a shaft and an electrically conductive bolt tip in electrical connection with an antenna array provided in the bolt; and a lock body having a cavity to receive the bolt tip and to secure the shaft therein, the lock body comprising a chip support provided in the cavity, the chip support having an opening to allow passage therethrough of only the bolt tip, a pair of electrically conductive resilient connector projecting from the chip support adjacent the opening, and a wireless communication chip provided on the chip support in electrical connection with the resilient connectors, wherein in a secured position when the bolt is fully inserted into the lock body, the lock body secures the shaft to prevent withdrawal of the bolt from the lock body and the bolt tip is passed through the opening in the chip support to be in electrically conductive contact with the resilient connectors such that the wireless communication chip is in electrical connection with the antenna array to enable wireless transmission of a signal data from the electronic bolt seal to a wireless communication reader; wherein rotation of the bolt relative to the lock body in the secured position breaks the bolt tip from
  • Each of the resilient connectors may comprise a projection formed in the resilient connector and the bolt tip may comprise a hole to mechanically engage the projection when the bolt tip is withdrawn from the chip support.
  • a first angle defined by the projection and a part of the bolt tip between the projection and the chip support may be an acute angle
  • a second angle defined by the projection and a part of the bolt tip extending beyond the projection may be an obtuse angle
  • the bolt tip may have a rectangular cross-section and the opening comprises a slot provided in the chip support.
  • the pair of resilient connectors may be pushed apart by the bolt tip and each resilient connector may be in electrically conductive contact with a transmission line provided on one of two sides of the bolt tip, and one of the transmission lines may be in electrical connection with the antenna array.
  • the bolt may further comprise a printed circuit board provided along a central longitudinal axis of the shaft, wherein the antenna array is provided on a first end of the printed circuit board extending beyond a first end of the shaft and the bolt tip is a second end of the printed circuit board extending beyond a second end of the shaft.
  • the bolt may be encapsulated in an electrically insulating plastic covering the first end of the shaft and the first end of the printed circuit board, the bolt tip and the second end of the shaft being unencapsulated.
  • the lock body may further comprise a collar provided in the cavity to secure the shaft therein, the collar and the shaft each provided with an annular channel to accommodate therebetween a ring provided to retain the shaft in the lock body.
  • the cavity may comprise a step provided on an inner wall of the lock body.
  • the chip support may be positioned in the cavity between the step and an inner end of the collar.
  • the chip support may comprise an electrically insulating plate provided in the cavity.
  • FIG. 1 is a cross-sectional front view of an exemplary embodiment of an electronic bolt seal in a secured position.
  • FIG. 2 is a cross-sectional side view of a bolt of the electronic bolt seal of FIG. 1.
  • FIG. 3 is an illustration of both sides of an antenna PCB of the electronic bolt seal of FIG. 1.
  • FIG. 4 is a bottom view of a chip support and resilient connectors of the electronic bolt seal of FIG. 1.
  • FIG. 5 is a close-up cross-sectional front view of a bolt tip and resilient connectors of the
  • FIG. 6 is a close-up cross-sectional front view of the bolt tip and resilient connectors of FIG. 5 upon initial withdrawal of the bolt from the lock body.
  • FIG. 7 is a close-up cross-sectional front view of the bolt tip and resilient connectors of FIG. 5 upon further withdrawal of the bolt from the lock body.
  • FIG. 8 is a close-up schematic illustration of a projection of the resilient connector.
  • FIGS. 1 to 8 Exemplary embodiments of an electronic bolt seal 10 will be described below with reference to FIGS. 1 to 8. The same reference numerals are used throughout the figures for the same or similar parts.
  • the electronic bolt seal 10 comprises a bolt 20 and a lock body 30.
  • the bolt 20 comprises a shaft 21 preferably having an enlarged head 25 at a first end 211 of the shaft 21 for ease of handling and a locking arrangement 27 at a second end 212 of the shaft 21 for locking the shaft 21 with the lock body 30.
  • the locking arrangement 27 of the shaft 21 may comprise an annular channel 27 on the shaft 21 that cooperates with a ring 36 and a corresponding annular channel 37 provided in the lock body 30 to secure the second end of the shaft 21 within the lock body 30 in a secured position when the bolt 20 is fully inserted into the lock body 30.
  • the shaft 21 is preferably made of steel or any material of similar strength and may be of such strength or mechanical property to conform to any required or requested standard, so that it can only be cut with a suitable tool.
  • the shaft 21 may optionally be ISO 17712 certified and/or C-TPAT compliant for use with shipment of cargo requiring high security.
  • the bolt 20 further comprises a printed circuit board (PCB) 29 provided through the shaft 21 along a central longitudinal axis of the shaft 21.
  • a first end 291 of the antenna PCB 29 extends beyond the first end of the shaft 21 while a second end 292 of the antenna PCB 29 extends beyond a second end of the shaft 21.
  • the second end 292 of the antenna PCB 29 is hereafter also referred to as the bolt tip 292.
  • the antenna PCB 29 has a first side 29A and a second side 29B as shown in FIG. 3.
  • an antenna array 26 located at the first end 291 of the antenna PCB 29 as well as a first transmission line 241 that runs along the length of the antenna PCB 29 to the second end 292 of the antenna PCB 29, as also shown in FIG. 2.
  • the first transmission line 241 is in electrical connection with the antenna array 26.
  • a second transmission line 242 is provided on the second side 29B of the antenna PCB 29 that runs along the length of the antenna PCB 29 to the second end 292 of the antenna PCB 29, as shown in FIG. 3.
  • the second transmission line 242 is electrically isolated from the antenna array 26 as well as the first transmission line 241.
  • the antenna array 26 and the two transmission lines 241, 242 may comprise an etched circuit track, for example, and are electrically isolated from any conductive material that other parts of the bolt 20 may be made of.
  • a hole 28 is provided at the second end 292 of the antenna PCB 29 through the first transmission line 241 and the second transmission line 242.
  • the antenna array 26 is configured to transmit signals carrying the information stored in a wireless communication chip and also to capture signals from a wireless communication reader that may supply energy for operation of the wireless communication chip when electrically connected with the wireless communication chip, as will be described in greater detail below.
  • the bolt 20 is preferably encapsulated in an electrically insulating plastic 201 that covers the first ends 211, 291 of both the shaft 21 and the antenna PCB 29, leaving exposed only the second end 212 of the shaft 21 and the bolt tip 292.
  • the lock body 30 has a cavity 31 that the bolt tip 292 and second end 212 of the shaft 21 are inserted into in order to form the seal.
  • the lock body 30 may further comprise a collar 39 provided in the cavity 31 to engage the shaft 21, such that the annular channel 37 provided in the lock body 30 as described above is provided on the collar 39, as shown in FIG. 1.
  • a chip support 40 is provided in the cavity 31 of the lock body 30.
  • the chip support 40 comprises an electrically insulating plate provided in the cavity and has an opening 42 that is sized to allow only the bolt tip 292 to pass through, as can be seen in FIG. 1.
  • the opening 42 may comprise a slot 42 provided in the chip support 40, as shown in FIG. 4.
  • Two electrically conductive resilient connectors 50 are provided on the chip support 40 on each side of the opening 42.
  • the resilient connectors 50 project from the chip support 40 away from the shaft 21, as shown in FIG. 1.
  • Each resilient connector 50 may comprise a resilient strip of an electrically conductive metal.
  • Conductive traces 45 provided on the chip support 40 electrically connect each resilient connector 50 with a wireless communication chip 43 provided on the chip support 40.
  • the chip support 40 and conductive traces 45 may be provided as a printed circuit board onto which one end of each of the resilient connectors 50 are soldered.
  • the wireless communication chip 43 may comprise an radio frequency identification (RFID) chip, although wireless communication chips 43 employing other wireless standards or networks such as cellular, Bluetooth, Sigfox, long range navigation (LORAN) etc. may alternatively be used.
  • RFID radio frequency identification
  • Each resilient connector 50 is cantilevered from the chip support 40 over the opening 42 so that the two resilient connectors 50 are pushed apart by the bolt tip 292 when the bolt tip 292 is passed through the opening 42 between the two resilient connectors 50, this occurring when the bolt 20 has been fully inserted into the lock body 30 in the secured position.
  • the resilient connectors 50 are in contact with the first surface 29A and the second surface 29B of the antenna PCB 29 at the bolt tip 292, as can be seen in FIGS. 5 and 8.
  • the two resilient connectors 50 are in electrical contact with the transmission lines 241, 242 at the bolt tip 292 (transmission lines not visible in FIG. 5), so that the antenna array 26 is now electrically connected with the wireless communication chip 43, while being electrically isolated from any conductive materials that may be used to form other parts of the lock body 30.
  • the antenna PCB 29 is intentionally asymmetric between its first side 29A and its second side 29B so as to create a potential difference between each side to power up the wireless communication chip 43 (when interrogated by a wireless communication reader) once the bolt 20 has been inserted into the lock body 30 and the antenna array 26 is electrically connected with the wireless communication chip 43.
  • a wireless communication reader (not shown) that is within reading range of the electronic bolt seal 10 is only possible when the antenna array 26 is in electrical connection with the wireless communication chip 43. Once the electrical connection between the antenna array 26 and the wireless communication chip 43 is broken, no signal can be sent from the wireless communication chip 43 to an interrogating wireless communication reader.
  • Breakage of the electrical connection between the antenna array 26 and the wireless communication chip 43 can only occur when the electronic bolt seal 10 has been tampered with once the electronic bolt seal 10 has been set in the secured position. Thus, when interrogation of the electronic bolt seal 10 in a secured position by a wireless communication reader returns no signal, it can be concluded that the electronic bolt seal 10 has been tampered with.
  • the electronic bolt seal 10 is configured to prevent electrical reconnection of the antenna array 26 with the wireless communication chip 43 even when the bolt 20 has been reassembled with the lock body 30 after forcible withdrawal.
  • each resilient connector 50 is configured to mechanically engage the bolt tip 292 upon withdrawal of the bolt 20 from the lock body 30, as shown in FIG. 6, such that when the bolt tip 292 is withdrawn from the chip support 40 (this occurring when the bolt 20 is forcibly withdrawn from the lock body 30), the bolt tip 292 pulls each resilient connector 50 towards the opening 42 so that one or both of the resilient connectors 50 is either broken or detached from the chip support 40, or both, as shown in FIG. 7.
  • electrical connection of the antenna array 26 in the bolt 20 with the wireless communication chip 43 in the lock body 30 is permanently broken. Further possibility of reconnection of the antenna array 26 in the bolt 20 with the wireless communication chip 43 in the lock body 30 is prevented because at least one of the resilient connectors 50 would have been destroyed when the bolt tip 292 was withdrawn from the chip support 40 in the lock body 30.
  • the resilient connector 50 comprises a projection 58 formed in the resilient connector 50 while the hole 28 in the bolt tip 292 mechanically engages the projection 58 when the bolt tip 292 is withdrawn from the chip support 40.
  • the projection 58 is preferably provided adjacent a free end of the resilient connector 50 and the bolt tip 292 is preferably dimensioned such that in the secured position, the hole 28 in the bolt tip 292 is positioned in the lock body 30 beyond the length of the resilient connector 50, as can be seen in FIGS. 5 and 8.
  • the projection 58 may comprise a sharp fold 58 formed in the resilient connector 50.
  • the projection 58 is configured to allow sliding of the bolt tip 292 against the projection 58 as the bolt tip 292 passes through the opening 42 in the chip support 40 without hindrance by the projection 58, as shown in FIG. 5.
  • the projection 58 is also configured such that sliding of the bolt tip 292 against the projection 58 during forcible withdrawal of the bolt tip 292 from the chip support 40 would result in the projection 58 mechanically engaging the hole 28 in the bolt tip 292, as shown in FIG. 6. Further withdrawal of the bolt tip 292 from the chip support 40 results in the resilient connectors 50 being pulled towards the opening of the partition 42, thereby deforming the resilient connectors 50 and ultimately breaking at least one of the resilient connectors 50 and/or detaching at least one of the resilient connectors 50 from the chip support 40, as shown in FIG. 7.
  • the projection 58 is preferably configured such that in the secured position, a first angle a defined by the projection 58 and the bolt tip 292 between the projection 58 and the chip support 40 is an acute angle, while a second angle b defined by the projection 58 and the bolt tip 292 extending beyond the projection 58 is an obtuse angle.
  • the above described electronic bolt seal 10 thus prevents reconnection of the antenna array 26 in the bolt 20 with the wireless communication chip 43 in the lock body 30 after forcible withdrawal of the bolt 20 from the lock body 30, thereby allowing tamper of the bolt seal 10 to be detected by a reader failing to obtain a signal from the electronic bolt seal 10 even if the bolt 20 has been reassembled with the lock body 30 to give the appearance of an intact seal after forcible withdrawal of the bolt 20 from the lock body 30.
  • Breakage of the bolt tip 292 from the shaft 21 destroys the electrical connection between the antenna array 26 in the bolt 20 and the wireless communication chip 43 in the lock body 30 as the transmission lines 241, 242 are accordingly broken when the bolt tip 292 is broken from the shaft 21.
  • the above described electronic bolt seal 10 thus destroys the antenna connection with the wireless communication chip when the bolt 20 is spun in the lock 30 or when the bolt is retracted from the lock 30 after the electronic bolt seal 10 has been set in the secured position. In this way, the electronic bolt seal 10 cannot possibly be reassembled after tamper to continue allowing signal transmission from the electronic bolt seal 10, thus providing a robustly tamper-evident seal.
  • the exemplary embodiment has described a projection 38 provided on the resilient connector 50 and a hole provided in the bolt tip 292 to effect mechanical engagement of the resilient connector with the bolt tip 292 upon withdrawal of the bolt from the lock body, in other embodiments, the mechanical engagement may be effected by other means, for example by providing an appropriately configured projection on the bolt tip and a corresponding hole in the resilient connector.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • Details Of Aerials (AREA)

Abstract

La présente invention concerne un joint à boulon électronique qui comprend : un boulon comprenant un arbre et une pointe de boulon électriquement conductrice en connexion électrique avec un réseau d'antennes disposé dans le boulon ; et un corps de verrou doté d'une cavité servant à recevoir la pointe de boulon et à fixer l'arbre à l'intérieur de celle-ci, le corps de verrou comprenant un support de puce disposé dans la cavité, le support de puce ayant une ouverture qui permet uniquement à la pointe de boulon de passer à travers celle-ci, une paire de connecteurs élastiques électriquement conducteurs faisant saillie à partir du support de puce adjacent à l'ouverture, et une puce de communication sans fil étant disposée sur le support de puce et étant en connexion électrique avec les connecteurs élastiques ; la rotation du boulon par rapport au corps de verrou dans la position fixée rompt la pointe de boulon du boulon ; et le fait de retirer le boulon du corps de verrou lorsqu'il se trouve dans la position fixée brise ou détache au moins l'un des connecteurs élastiques, ce qui permet d'empêcher une nouvelle possibilité de reconnexion électrique de la puce de communication sans fil avec le réseau d'antennes.
PCT/SG2019/050361 2019-07-25 2019-07-25 Joint à boulon électronique WO2021015666A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/SG2019/050361 WO2021015666A1 (fr) 2019-07-25 2019-07-25 Joint à boulon électronique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SG2019/050361 WO2021015666A1 (fr) 2019-07-25 2019-07-25 Joint à boulon électronique

Publications (1)

Publication Number Publication Date
WO2021015666A1 true WO2021015666A1 (fr) 2021-01-28

Family

ID=67551403

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SG2019/050361 WO2021015666A1 (fr) 2019-07-25 2019-07-25 Joint à boulon électronique

Country Status (1)

Country Link
WO (1) WO2021015666A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2816434A1 (fr) * 2000-11-06 2002-05-10 Robert Stephan Touzet Dispositif de scelle a puce electronique
WO2006032166A1 (fr) * 2004-09-23 2006-03-30 Lien-Feng Lin Serrure inviolable dotee d’une fonction d’identification
WO2011009174A1 (fr) * 2009-07-24 2011-01-27 Wi Protect Pty Ltd Scellé radiodétectable avec témoin d’intégrité
US20130233035A1 (en) * 2012-03-09 2013-09-12 Neology, Inc. Tamper evident cargo container seal bolt lock
US20150061303A1 (en) * 2013-08-27 2015-03-05 Novavision, Inc. Bolt Security Seal

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2816434A1 (fr) * 2000-11-06 2002-05-10 Robert Stephan Touzet Dispositif de scelle a puce electronique
WO2006032166A1 (fr) * 2004-09-23 2006-03-30 Lien-Feng Lin Serrure inviolable dotee d’une fonction d’identification
WO2011009174A1 (fr) * 2009-07-24 2011-01-27 Wi Protect Pty Ltd Scellé radiodétectable avec témoin d’intégrité
US20130233035A1 (en) * 2012-03-09 2013-09-12 Neology, Inc. Tamper evident cargo container seal bolt lock
US20150061303A1 (en) * 2013-08-27 2015-03-05 Novavision, Inc. Bolt Security Seal

Similar Documents

Publication Publication Date Title
US10689882B2 (en) Tamper evident cargo container seal bolt lock
US10815694B2 (en) Tamper evident cargo container seal bolt lock
US20060202824A1 (en) Electronic seal and method of shipping container tracking
CA2538746C (fr) Joint d'etancheite
US9177491B2 (en) Sealing device
CN101370998B (zh) 一种带破坏指示和通知的锁紧密封装置
US20060103524A1 (en) Smart container monitoring system
WO2021015666A1 (fr) Joint à boulon électronique
US11568765B2 (en) Sealing device
WO2009098670A2 (fr) Joint inviolable
CN208221288U (zh) 带电子标签的高保螺栓封
US7408469B2 (en) Security device for electrical cord

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19750183

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19750183

Country of ref document: EP

Kind code of ref document: A1