CN1032275C - Cushion element for detonators like, apparatus and method of assembly - Google Patents
Cushion element for detonators like, apparatus and method of assembly Download PDFInfo
- Publication number
- CN1032275C CN1032275C CN91102897A CN91102897A CN1032275C CN 1032275 C CN1032275 C CN 1032275C CN 91102897 A CN91102897 A CN 91102897A CN 91102897 A CN91102897 A CN 91102897A CN 1032275 C CN1032275 C CN 1032275C
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- China
- Prior art keywords
- vibration
- signal
- damped component
- trigger
- blind end
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- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000002360 explosive Substances 0.000 claims abstract description 81
- 239000000463 material Substances 0.000 claims abstract description 68
- 230000037452 priming Effects 0.000 claims description 14
- 230000008054 signal transmission Effects 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 4
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- 230000000977 initiatory effect Effects 0.000 abstract description 11
- 239000012528 membrane Substances 0.000 abstract description 6
- 230000035939 shock Effects 0.000 abstract description 3
- 230000002745 absorbent Effects 0.000 abstract 1
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- 238000007906 compression Methods 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000008187 granular material Substances 0.000 description 5
- 238000005422 blasting Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003721 gunpowder Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
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- 238000012545 processing Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- XTFIVUDBNACUBN-UHFFFAOYSA-N 1,3,5-trinitro-1,3,5-triazinane Chemical compound [O-][N+](=O)N1CN([N+]([O-])=O)CN([N+]([O-])=O)C1 XTFIVUDBNACUBN-UHFFFAOYSA-N 0.000 description 2
- IUKSYUOJRHDWRR-UHFFFAOYSA-N 2-diazonio-4,6-dinitrophenolate Chemical compound [O-]C1=C([N+]#N)C=C([N+]([O-])=O)C=C1[N+]([O-])=O IUKSYUOJRHDWRR-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 150000001540 azides Chemical class 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005474 detonation Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
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- 239000011435 rock Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000000020 Nitrocellulose Substances 0.000 description 1
- TZRXHJWUDPFEEY-UHFFFAOYSA-N Pentaerythritol Tetranitrate Chemical compound [O-][N+](=O)OCC(CO[N+]([O-])=O)(CO[N+]([O-])=O)CO[N+]([O-])=O TZRXHJWUDPFEEY-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
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- 239000003999 initiator Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- C06C7/00—Non-electric detonators; Blasting caps; Primers
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Air Bags (AREA)
- Geophysics And Detection Of Objects (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
An improved detonator includes a housing having an open end and an opposite, closed end and defining an axially-extending channel of the housing. A cushion element containing at least one aperture is disposed within the channel and is provided with a resilient, pliable and shock absorbent surface for contacting and retaining explosive material at the closed end of the detonator housing. The cushion element has a signal communicating membrane covering its at least one aperture for passage therethrough of an initiating signal to the explosive material. A method for assembling the detonator includes inserting explosive material into the axially extending channel of the detonator housing, inserting a cushion element having a signal communicating membrane into the channel, and pressing the cushion element towards the closed end of the housing for compacting the explosive material between the cushion element and the closed end of the housing.
Description
The present invention is generally relevant with the device of detonator signal amplification and transmission, concrete structure-improved and assembly method about trigger.
In bursting work, available various electronic and non-electrical devices is amplified detonator signal and is transmitted, and comprises trigger, igniter, delay detonator, initiator or the like.In this article, the various devices that time break is amplified and transmits of term " trigger " general reference.
Trigger generally has a microscler tubular shell, end sealing, and other holds uncovered, and one or more pyrotechnic compounds or explosive agent are arranged, and is placed in the shell adjacent with blind end.
Therefore the output of trigger and the chemical composition of explosive are proportional, and be equally also proportional with its density and loading amount, will push explosive in the shell with the push strut of a minor diameter.For reaching desirable explosive density, may use up to 300 pounds (to be 600 pounds/inch on the push strut of 0.254 inch external diameter) or higher pressure.
If found to add the compression energy with a crust on the surface of gunpowder, many explosives all can trigger more responsive to collision or friction.Its sensitivity is the function of hardness, and promptly hardness increases and causes sensitivity to be increased.Owing to obtain the required high pressure of the desirable gunpowder density of trigger, normally realize that with push strut the typical case directly contacts with explosive with steel, makes the explosive sensitivity, the danger when having increased extruding explosive with gunpowder compression in the shell.
The hardness of push strut, the aligning of instrument during the compression explosive explosive is crushed to the combination of factors such as granule, and because the high pressure conditions of explosive unless the situation of formation has very thoughtful control, otherwise may cause the unexpected unfavorable initiation of trigger.
Compression during explosive trigger be not intended to cause another potential mechanism, for the explosive compacting time, the granule of explosive is moved in the annular space between push strut and the shell.Push in the housing in that push strut is moved, explosive material is compressed, when perhaps extracting out from shell, the explosive material of intercepting and capturing between shell and the push strut surface bears very a large amount of frictions, may cause disadvantageous ignition.
After explosive compressed in shell, usually trigger is transported between the manufacturer, or transport to and use on-the-spotly, trigger bears vibration during transportation, rocks and collides, tend to will compression explosive material loosen.The loose particles of explosive typically very easily causes because of friction and static, safety when therefore having influence in transit with the carrying that arrives behind the new place.
Therefore purpose of the present invention is to provide a kind of trigger and assemble method thereof of improvement, and this trigger makes it when trigger is assembled by using a fault vibration-damped component when the compression explosive material, has the ability of the inhibition unintended detonation of enhancing.
Other purposes of the present invention, a part see easily that obviously one one will be in hereafter.
Purpose of the present invention, advantage, characteristics, performance and relation about the narration of some embodiments of giving an example, reach illustrating of accompanying drawing vide infra, just can understand more, and the whole bag of tricks of the principle of the invention is used in the texts and pictures explanation.
The priming signal of making by the present invention amplifies conveyer, and a tubular shell that wherein forms axial slot is arranged, and housing has a blind end, and the end of opening wide on the other side; The explosive material that holds compression in the conduit is against blind end; A vibration-damped component is placed in the groove, and is adjacent with explosive material, and explosive is covered substantially, and vibration-damped component has the absorbing surface of a flexibility towards material, and contact with it keeps explosive material against blind end; A Flapper type signal transmission surface forms on vibration-damped component, and signal is transmitted to explosive material.
In another aspect of this invention, the madial wall of vibration-damped component and shell interference fit on diameter, the explosive that keeps compression is against blind end.
Disclose a kind of modification method of novelty in the present invention, comprise explosive material is packed in the axial slot of tubular shell; To there be the vibration-damped component of signal transfer surface to put into groove, cover the vibration-damped component in the cross section of groove, with madial wall tight fit on diameter of shell; With the blind end pushing of vibration-damped component to shell, thereby with explosive material compacting between vibration-damped component and housings close.
In other method of the present invention, before explosive material is put into conduit, housing is erect the placement blind end below opening wide end, thereby be bonded at the residue explosive material on the shell, when compressing, scrape by vibration-damped component, fall to blind end in the gravity effect.
In aspect another of the inventive method, with some the pre-cutting of accurate spacing or the vibration-damped component made from additive method arranged, do separable supporting with a sheet material, one opening end aligns in each vibration-damped component and the some triggers, and those vibration-damped components are put into these trigger shells simultaneously.
Fig. 1 is the longitudinal sectional view that the instantaneous trigger of on-electric of vibration-damped component of the present invention is arranged;
Fig. 2 is the longitudinal sectional view that the on-electric time fire device of vibration-damped component of the present invention is arranged;
Fig. 3 is the longitudinal sectional view that the electronic instantaneous trigger of vibration-damped component of the present invention is arranged;
Fig. 4 is the enlarged drawing along 4-4 along the line on Fig. 1 vibration-damped component;
Fig. 5 is the cutaway view of vibration-damped component 5-5 along the line among Fig. 4;
Fig. 6 is the enlarged drawing of the another embodiment of vibration damping among Fig. 4;
Fig. 7 is the cutaway view along 7-7 along the line among Fig. 6;
Fig. 8 is the enlarged drawing of another embodiment of vibration-damped component among Fig. 5;
Fig. 9 is the cutaway view of 9-9 along the line among Fig. 3;
Figure 10 shows the hole of the initator of filling of each vibration-damped component;
Figure 11 is the longitudinal sectional view that is equipped with the trigger of vibration-damped component of the present invention, and dotted line shows push strut;
Figure 12 is the overlooking of sheet shape piece that some vibration-damped components of the present invention are arranged;
Figure 13 is the enlarged drawing of details A among Figure 11.
Vibration-damped component of the present invention is specially adapted to the device with time break amplification and transmission, for example Trigger. Vibration-damped component provides the padded surface of a flexibility, with the explosive material in the trigger shell Contact when material is compressed, namely in the manufacture process, reduces the friction of material as far as possible in shell Cause, keep then material to compress in shell, when reducing carrying afterwards, trigger is rushed Hit the chance of initiation.
Referring to Fig. 1, show that vibration-damped component 11 of the present invention is placed in the instantaneous trigger 12 of on-electric.Trigger has and forms the tubular housing l3 of being roughly of axial slot 14 within it, and blind end 16 and an opening end 17 relative with blind end l6 are arranged.The sealing annular channel that term " conduit " forms with tubular shell inner surface or sidewall in order to general reference in text.First (ground level charging) of two explosive B Bs charging 20 is placed in the groove, causes charging 22 and is placed in the groove l4, feeds 20 adjacent with ground level.
Vibration-damped component 11 and initiation charging 22 placed adjacent, its size is made to be provided and cooperating that the shell madial wall compresses slightly.In desirable embodiment, think that 0.003 to 0.005 inch interference is for suitable; But the degree of compressing can change according to the selected material that forms vibration-damped component, and the ideal restriction of explosive material in groove is provided.
Vibration-damped component 11 is used the yielding material manufacturing that can keep shape, has tender texture to make vibration damping.Desirable vibration damping manufactured materials is a cardboard; But polymer, such as polyethylene, rubber and polyurethane also are fit to do the manufactured materials of vibration-damped component.
The normal operation of trigger requires an apparatus for transmitting signal to transmit priming signal, carries to causing charging 22, with its ignition, triggers ground level charging 20.The form of signal can be the explosion bow wave of shock tube 25, the det-cord of the instantaneous trigger 12 of the detonation front of flame of explosion tube or on-electric (Fig. 1).Signal also can have the form of thermal pulse, such as the pyrotechnic compound timing element 27 in the time fire device 28 (Fig. 2), or be instantaneous and the thermal pulse of the generations such as igniting agent 30 of the bridging line of electronic trigger 32 of time lagged type (Fig. 3) or Lighter (electric match) 31 triggerings.
For with priming signal to causing charging 22 reliable delivery, signal transfer surface 35 of shape in vibration-damped component.Referring to Fig. 1,4,5,6 and 7, the signal transfer surface is a configuration that has a hole at least, has enough spaces that priming signal is passed through, and reaches to cause charging 22, with its initiation.In addition, this configuration should have fully little hole of size again, to play baffle effect, with explosive material 20,22 against blind end 16.The formation of this configuration can be by establishing at least one central through hole 38 (Fig. 4 and 5) on vibration-damped component 11, or establish a central through hole 38 on vibration-damped component 11, covers filter screen 40 (Fig. 6 and 7) above.Referring to Fig. 8 and 9, the formation of signal transfer surface 35 also can be by establishing a central through hole 38 on vibration-damped component, cover with a film 43, play clamping baffle plate or film, and priming signal can more easily be passed through, the reliability that explosive material causes does not have substantial degradation.Suitable membrane material comprises and is bonded at vibration-damped component 11 lip-deep porous thin papers, or with other the non-metal knitted material that priming signal can be passed through.Other membrane materials comprise non-porous inert membrane, such as cellulose acetate, or eliminate material certainly, the nitrocellulose of the high nitrogen content that can decompose rapidly when comprising the contact priming signal.All these film vibration-damped components provide the desirable anti-impact force of desirable improvement.
For making detailed descriptionthe, please note the hole on the element 11, no matter seal, or some less holes are arranged on the vibration-damped component 11 with net 40 or film 43, in its space, fill and cause charging 22, the typical case has lead azide.Amplification Figure 10 represents the configuration of film embodiment; Clear for other are respectively schemed, in other figure, omitted the hole of the filling " ".
With trigger and vibration-damped component of the present invention assembling, the accident that can greatly reduce the trigger explosive material when assembling causes.Referring to Figure 11, at first groove 14 is put in ground level charging 20 and initiation charging 22.Then vibration-damped component 11 is put into groove 14, with push strut 48 shift onto with cause the charging position adjacent on.Because need the gap to make push rod 48 be easy in shell, advance and retreat, between push strut 48 and shell 13, form a little cannelure.When vibration-damped component 11 is pushed away,, therefore prevent deposition in the cannelure 49 of any blasting explosive granules between push strut 48 and shell 13 downwards because the tight fit of vibration-damped component and shell scrapes any remaining explosive material that is bonded on the shell in the groove in the chamber of shell 13.Bulldozing operation carries out when housing 13 upright placements, and blind end 16 is below open end, and in bulldozing operation, any loose explosive that vibration-damped component 11 scrapes is because of gravity drops on without on the explosive material that compresses.
In with vibration-damped component 11 insertion grooves and when being urged, signal transmission surface 35 is overflowed the air that is sealed, thereby prevents to cause the back pressure that makes the vibration-damped component warpage or break.And the little blasting explosive granules of carrying secretly in the air-flow is stopped in the effect of vibration-damped component amicon, thereby prevents that explosive from polluting the space above the vibration-damped component.
After desirable pressure is added on the explosive material, just push strut 48 to be extracted out from groove 14, vibration-damped component 11 keeps explosive material is compressed in shell.And, on the shell wall in groove, the sticking explosive that stays loose malcompression, thereby the needs of the loose explosive material that elimination cleaning shell inner surface and cleaning are collected, vibration-damped component also can reduce because of trigger reaches in transit when storing as far as possible, vibrates and rock the loose of the explosive material that causes.
Found with the assembling of trigger and vibration-damped component of the present invention, can greatly improve trigger and suppress to impact the ability that causes that the i.e. initiation that causes of external force such as adjacent wellbores borehole blasting, or is hit or the like the shock wave that produces etc. to trigger.Result of the test shows, the trigger of igniting vibration-damped component is housed, and than the trigger that is unkitted vibration-damped component, suppresses to impact or collide and cause the ability of initiation to increase three times.And vibration-damped component is provided with membrane type signal transfer surface 43 (Fig. 9), and the ability that suppresses to impact also more has raising.Result of the test also shows, the vibration-damped component of the present invention of band lamina membranacea aims at the trigger that improves the antivibration ability and design than having earlier in the field, and the antivibration ability of having improved is arranged.
Referring to Fig. 2, often there is requirement that a kind of trigger that delay cell 27 is arranged is provided.Can after being put into housing 12, explosive material and vibration-damped component 11 insert delay cell immediately.Be added in the pressure on the delay cell, be delivered on the vibration-damped component, be communicated to again on the explosive, with the explosive material compacting by delay cell.Otherwise the manufacturing of trigger also can compress explosive by utilizing vibration-damped component, with the explosive material compacting, inserts the time-delay part that can be crushed on the vibration-damped component then, the further seating vibration-damped component of the part of will delaying time, the explosive material of compacting simultaneously.Since in the compaction process of vibration-damped component 11, removed the evacuation particle of explosive material substantially, can be when inserting delay cell in the trigger, the unexpected initiation of trigger that the blasting explosive granules friction ignition that basic elimination is stopped between housing and time-delay part causes.And, eliminate explosive and evacuate particle, reduce trigger and make priming signal walk around the too early initiation of delay element because of explosive is arranged between delay element and housing.
For be easy to assemble under situation about reducing the cost, the typical case assembles some triggers simultaneously with the processing block (not shown) that can hold 50 to 500 shells in the automation assembling process.After these housings are put into processing block, explosive material is put into the conduit of each shell, in order to compression subsequently.Vibration-damped component of the present invention is adapted at using in such automation assembling process.Referring to Figure 12 and 13, some vibration-damped component 11 usable fibers plates are die-cut, or molded with plastics, form hole battle array plate 52, and the formation that each vibration-damped component is located on the battle array plate of hole is consistent with the formation of processing block (not shown).Then hole battle array plate 52 is placed on the top of trigger, each aligns each vibration-damped component on the battle array plate of hole with the openend of a trigger, and whole vibration-damped components are pushed in housing simultaneously.
If trigger has a delay cell 27, delay cell can be placed between each vibration-damped component 11 and the push strut 48, as mentioned above pressure directly is added on the time-delay part with push strut then.
With one or more retention tabs 55 each vibration-damped component 11 is done separable maintenance on hole battle array plate 52, but the material thickness attenuate of retention tab 55 makes it to be easy to be pushed depression bar 48 (Figure 11) and breaks.
It is suitable with the cardboard realization to have found that above-mentioned retention tab links, but available other devices provide separability, and also available other sheet materials.
Though to the present invention just for example embodiment do diagram and narration, be familiar with present technique field person and should be understood that and can do above-mentioned and various other variation it, omit and additional, and without departing from the spirit or scope of the invention.
Claims (12)
1. trigger is characterized in that it comprises following:
The tubular shell that madial wall is arranged, madial wall forms axially extended conduit in shell, this housing have a blind end and one relative with this blind end open wide end;
Be received within the explosive material in this conduit, place against this blind end;
A vibration-damped component that is placed in this conduit, adjacent maintenance shape with this material, this vibration-damped component covers this material substantially, and the flexible absorbing surface relative with this material arranged, and with it the contact, keep this material and this blind end against;
Flapper type signal transmits the surface, on this vibration-damped component, form, with priming signal to this material transfer, thereby this signal causes this material, signal is amplified and transmits.
2. as the trigger of claim 1, it is characterized in that a time-delay part that the pyrotechnic compound composition is arranged is arranged, priming signal is postponed to transmit between first end, second end of time-delay part that this time-delay part is placed in this conduit, it is adjacent that this second side and this signal transmit the surface.
3. as the trigger of claim 1, it is characterized in that having apparatus for transmitting signal to transmit priming signal, this device is placed in this groove, and it is adjacent that an end of device and this signal transmit the surface.
4. as the trigger of claim 2, it is characterized in that having an apparatus for transmitting signal to transmit priming signal, this device is placed in this groove, and first side of an end of device and this time-delay part is adjacent.
5. as the trigger of claim 1, and be characterised in that there is a lamina membranacea on this signal transmission surface, can eliminate by the explosion priming signal.
6. as the trigger of claim 1, it is characterized in that, there is a configuration that has a hole at least on this signal transmission surface, this configuration has enough wide open spaces, detonator signal can be passed through, to this explosive material igniting, this configuration has fully little aperture, and maintenance compresses this explosive material on this blind end.
7. as the trigger of claim 1, it is characterized in that, this vibration-damped component and this shell madial wall interference fit on diameter, maintenance with this explosive material against this blind end.
8. a method of making trigger is characterized in that, it comprises that step is as follows:
Its inwall is set forms the tubular shell that extends axially conduit, this shell has a blind end and relative with this a blind end end of opening wide;
Explosive material is put into the openend of this conduit;
A vibration-damped component that signal transmission surface arranged is put into the openend of this conduit, and this vibration-damped component interdicts the cross section of this conduit, with madial wall interference fit on diameter of this shell;
To this blind end pushing, this vibration-damped component provides a flexible surface, with the blind end compacting of this explosive material against this shell with this vibration-damped component.
9. as the method for claim 8, it is characterized in that, it comprises step: this explosive material is being put into the elder generation of this conduit, keep this housing upright, this blind end is placed on this opening end below, thereby with this vibration-damped component during to this blind end pushing, because the internal diameter tight fit of this vibration-damped component and this housing, the any nubbin that is bonded at the explosive material on this housing is scraped, and the explosive material that scrapes is fallen on this blind end because of gravity.
10. as the method for claim 8, it is characterized in that it comprises step:
Be provided with the delay cell of pyrotechnic compound composition, detonator signal is postponed transmission between first and second end of this delay cell;
This delay cell is put into this conduit, and it is adjacent that its second end and this signal transmit the surface;
This delay cell is pushed to this blind end.
11. the method as claim 8 is characterized in that, it comprises step:
Make this signal transmission surface that a lamina membranacea be arranged, can it be eliminated by detonator signal.
12. the method as claim 8 is characterized in that, it comprises step:
Make this signal transmission surface that a configuration that comprises a hole at least be arranged, this configuration has enough wide open spaces, and detonator signal can be passed through therein, and to this explosive material igniting, the aperture of this configuration is fully little of to keep the compacting on this blind end of this explosive material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US608,688 | 1984-05-10 | ||
| US60868890A | 1990-11-05 | 1990-11-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1061279A CN1061279A (en) | 1992-05-20 |
| CN1032275C true CN1032275C (en) | 1996-07-10 |
Family
ID=24437589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91102897A Expired - Lifetime CN1032275C (en) | 1990-11-05 | 1991-04-25 | Cushion element for detonators like, apparatus and method of assembly |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPH04236100A (en) |
| CN (1) | CN1032275C (en) |
| AU (1) | AU7372691A (en) |
| BR (1) | BR9104804A (en) |
| CA (1) | CA2038765C (en) |
| GB (1) | GB2249373A (en) |
| NO (1) | NO911409L (en) |
| RU (1) | RU2066829C1 (en) |
| SE (1) | SE507700C2 (en) |
| ZA (1) | ZA912311B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ292545B6 (en) | 2001-08-06 | 2003-10-15 | Austin Detonator S. R. O. | Detonating fuse with improved spatial and power adjustment of initiating capacity and brisance |
| WO2019004496A1 (en) * | 2017-06-28 | 2019-01-03 | 주식회사 한화 | Trunk line delay detonator and blast triggering device using same |
-
1991
- 1991-03-21 CA CA002038765A patent/CA2038765C/en not_active Expired - Lifetime
- 1991-03-22 AU AU73726/91A patent/AU7372691A/en not_active Abandoned
- 1991-03-27 ZA ZA912311A patent/ZA912311B/en unknown
- 1991-04-11 NO NO91911409A patent/NO911409L/en unknown
- 1991-04-12 GB GB9107767A patent/GB2249373A/en not_active Withdrawn
- 1991-04-25 CN CN91102897A patent/CN1032275C/en not_active Expired - Lifetime
- 1991-05-29 SE SE9101638A patent/SE507700C2/en not_active IP Right Cessation
- 1991-07-02 JP JP3187076A patent/JPH04236100A/en active Pending
- 1991-11-04 BR BR919104804A patent/BR9104804A/en not_active IP Right Cessation
- 1991-11-04 RU SU915010065A patent/RU2066829C1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| CA2038765A1 (en) | 1992-05-06 |
| CN1061279A (en) | 1992-05-20 |
| BR9104804A (en) | 1992-06-23 |
| GB2249373A (en) | 1992-05-06 |
| AU7372691A (en) | 1992-05-07 |
| CA2038765C (en) | 1996-03-26 |
| SE9101638L (en) | 1992-05-06 |
| SE507700C2 (en) | 1998-07-06 |
| SE9101638D0 (en) | 1991-05-29 |
| GB9107767D0 (en) | 1991-05-29 |
| ZA912311B (en) | 1991-12-24 |
| RU2066829C1 (en) | 1996-09-20 |
| JPH04236100A (en) | 1992-08-25 |
| NO911409D0 (en) | 1991-04-11 |
| NO911409L (en) | 1992-05-06 |
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