U.S. patent application number 17/049525 was filed with the patent office on 2021-08-19 for refill interface.
The applicant listed for this patent is Hewlett-Packard Development Company, L.P.. Invention is credited to Kevin Lo, Steve A O'Hara, Kenneth Williams.
Application Number | 20210254955 17/049525 |
Document ID | / |
Family ID | 1000005609293 |
Filed Date | 2021-08-19 |
United States Patent
Application |
20210254955 |
Kind Code |
A1 |
O'Hara; Steve A ; et
al. |
August 19, 2021 |
REFILL INTERFACE
Abstract
An explosive detonating system comprises connectable components
to connect/disconnect a pathway that ignites an explosion. A firing
actuator activates primers (percussion caps). An adapter connects
the firing actuator to shock tube and channels the ignition force
into the shock tube. A cap box houses blasting caps coupled to the
end of the shock tube. A priming well is coupled to the cap
box/blasting caps and the detonating cord. When the firing actuator
is initiated, the percussion caps ignite, sending an explosive wave
into the adapter, which channels the wave into the shock tube and
ignites the shock tube. The explosive wave travels through the
shock tube and activates the blasting caps, which activate the
detonating cord in the priming well. The explosive is placed in a
location to provide a desired explosive effect. For example, the
system may be employed as a system to breach structures or other
applications.
Inventors: |
O'Hara; Steve A; (Vancouver,
WA) ; Williams; Kenneth; (Vancouver, WA) ; Lo;
Kevin; (Vancouver, WA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Hewlett-Packard Development Company, L.P. |
Spring |
TX |
US |
|
|
Family ID: |
1000005609293 |
Appl. No.: |
17/049525 |
Filed: |
August 30, 2018 |
PCT Filed: |
August 30, 2018 |
PCT NO: |
PCT/US2018/047861 |
371 Date: |
October 21, 2020 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
62549915 |
Aug 24, 2017 |
|
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F42C 19/10 20130101;
F42C 7/12 20130101; F42D 1/043 20130101 |
International
Class: |
F42C 7/12 20060101
F42C007/12; F42C 19/10 20060101 F42C019/10; F42D 1/04 20060101
F42D001/04 |
Claims
1. A system to detonate an explosive, comprising: at least one
blasting cap; a shock tube adapter; a shock tube having one end
connected to the at least one blasting cap and another end
connected to the shock tube adapter; at least one percussion cap
inserted into the shock tube adapter; detonating cord; a priming
well configured to receive the at least one blasting cap and a
section of the detonating cord such that insertion of the at least
one blasting cap into the priming well and insertion of the section
of the detonating cord into the priming well places the inserted at
least one blasting cap in proximity to the inserted section of the
detonating cord such that initiation of the at least one blasting
cap will initiate detonation of the detonating cord; and a firing
device that receives the shock tube adapter and comprising a firing
pin that when fired is configured to initiate the percussion cap
inserted into the shock tube adapter that is inserted into the
firing device.
2. The system of claim 1, further comprising a cap box, wherein the
at least one blasting cap is inserted into the cap box, and wherein
the cap box is inserted into the priming well to insert the at
least one blasting cap into the priming well.
3. The system of claim 2, the cap box and the priming well
comprising corresponding retention mechanisms that retain that cap
box in the priming well.
4. The system of claim 1, further comprising a main explosive
connected to the detonating cord.
5. The system of claim 1, the priming well comprising: a first
aperture that receives the section of the detonating cord; and a
second aperture that receives the blasting cap.
6. The system of claim 5, wherein the first and second apertures of
the priming well are configured to dispose the section of the
detonating cord and the at least one blasting cap in proximity to
each other such that initiation of the at least one blasting cap
will initiate detonation of the detonating cord.
7. The system of claim 5, wherein the first and second apertures of
the priming well are open to each other inside the priming
well.
8. The system of claim 5, wherein the first aperture of the priming
well slopes toward the second aperture of the priming well internal
to the priming well, wherein the sloping of the first aperture
forces the section of the detonating cord inserted into the first
aperture of the priming well toward the at least one blasting cap
inserted into the second aperture of the priming well.
9. The system of claim 5, wherein the priming well comprises two
components that snap together to form the priming well.
10. The system of claim 5, wherein the two components of the
priming well are the same.
11. The system of claim 1, the shock tube adapter comprising: a
first pair of apertures that receive the another end of the shock
tube that is connected to the shock tube adapter; and a second pair
of apertures that receive the at least one percussion cap inserted
into the shock tube adapter.
12. The system of claim 11, wherein each of the second pair of
apertures of the shock tube adapter is connected directly to a
corresponding one of the first pair of apertures of the shock tube
adapter.
13. The system of claim 11, wherein each of the second pair of
apertures of the shock tube adapter is connected to both of the
first pair of apertures of the shock tube adapter.
14. The system of claim 11, the shock tube adapter further
comprising an expansion chamber disposed between the first and
second pairs of apertures of the shock tube adapter, each of the
first pair of apertures opening into the expansion chamber, and
each of the second pair of apertures opening into the expansion
chamber.
15. The system of claim 11, the shock tube adapter comprising a
shock tube casing and a percussion cap casing, the first pair of
apertures being disposed in the shock tube casing, the second pair
of apertures being disposed in the percussion cap casing, and the
shock tube casing and the percussion cap casing comprising a
retention mechanism that connects the shock tube casing to the
percussion cap casing.
16. The system of claim 15, the percussion cap casing comprising an
expansion chamber, the second pair of apertures opening into the
expansion chamber, and the first pair of apertures opening into the
expansion chamber when the shock tube case is connected to the
percussion cap case.
17. The system of claim 1, the shock tube adapter and the firing
device comprising corresponding retention mechanisms that retain
that shock tube adapter in the firing device.
18. The system of claim 1, wherein the percussion cap is a
primer.
19. The system of claim 1, wherein the priming well places at least
one inserted blasting cap in proximity to the inserted section of
the detonating cord based on contact between the inserted at least
one blasting cap and the inserted section of the detonating
cord.
20. The system of claim 1, the firing device comprising an actuator
and a remote signaling device, the remote signaling device
configured to communicate a signal to the actuator to cause the
actuator to move a firing pin to initiate the at least one
percussion cap.
21. A priming well to couple blasting caps to detonating cord,
comprising: a housing; a first aperture extending into the housing
and configured to receive detonating cord; and a second aperture
extending into the housing and configured to receive a blasting
cap.
22. The system of claim 21, the first and second apertures
overlapping inside the housing to dispose detonating cord inserted
into the priming well in proximity to a blasting cap inserted into
the priming well such that initiation of the blasting cap will
initiate detonation of the detonating cord.
23. The system of claim 22, the first and second apertures being
open to each other at an overlapping portion of the first and
second apertures inside the housing.
24. The system of claim 21, the first aperture sloping toward the
second aperture internal to the housing such that insertion of
detonating cord into the first aperture forces the detonating cord
toward a blasting cap inserted into the second aperture.
25. The system of claim 21, the first aperture sloping toward the
second aperture internal to the housing such that insertion of
detonating cord into the first aperture forces the detonating cord
into contact with a blasting cap inserted into the second
aperture.
26. The system of claim 21, the housing comprising two components
that snap together to form the housing.
27. The system of claim 21, wherein the two components of the
housing are the same.
28. A shock tube adapter to connect shock tube to a firing device,
comprising: a housing; a first pair of apertures extending into the
housing and each configured to receive an end of shock tube that is
inserted into the housing; and a second pair of apertures extending
into the housing and each configured to receive a percussion cap
inserted into the housing, the second pair of apertures connecting
to the first pair of apertures.
29. The system of claim 28, wherein each of the second pair of
apertures is connected directly to a corresponding one of the first
pair of apertures.
30. The system of claim 28, wherein each of the second pair of
apertures is connected to both of the first pair of apertures.
31. The system of claim 28, further comprising an expansion chamber
disposed in the housing and that connects the second pair of
apertures to the first pair of apertures, each of the first pair of
apertures opening into the expansion chamber, and each of the
second pair of apertures opening into the expansion chamber.
32. The system of claim 28, the housing comprising a shock tube
casing and a percussion cap casing, the first pair of apertures
being disposed in the shock tube casing, the second pair of
apertures being disposed in the percussion cap casing, and the
shock tube casing and the percussion cap casing comprising a
retention mechanism that connects the shock tube casing to the
percussion cap casing.
33. The system of claim 32, the percussion cap casing comprising an
expansion chamber, the second pair of apertures opening into the
expansion chamber, and the first pair of apertures opening into the
expansion chamber when the shock tube case is connected to the
percussion cap case.
34. The system of claim 28, further comprising a retention
mechanism disposed on the housing and configured to couple the
housing to a firing device.
35. A method to detonate an explosive, comprising: connecting an
end of at least one section of shock tube to at least one blasting
cap; inserting the at least one blasting cap into a cap box;
connecting another end of the at least one section of shock tube to
a shock tube adapter; inserting at least one percussion cap into
the shock tube adapter; inserting a section of detonating cord into
a priming well; inserting the cap box into the priming well,
thereby inserting the at least one blasting cap into the priming
well, wherein insertion of the at least one blasting cap into the
priming well places the blasting cap in proximity to the inserted
section of detonating cord such that initiation of the blasting cap
will initiation detonation of the detonation cord; and connecting
the shock tube adapter to a firing device, the firing device being
configured to strike the at least one percussion cap in the shock
tube adaptor such that striking the percussion cap initiates the
percussion cap to send an explosive wave to the shock tube, which
initiates the shock tube causing initiation of the blasting cap,
which causes initiation of the detonating cord.
36. The method of claim 35, further comprising actuating the firing
device to cause one or more firing pins to strike at least one of
the at least one percussion cap to initiate at least one of the at
least one percussion cap.
37. The method of claim 35, further comprising transporting each of
the unconnected components to a desired location for an explosion
and assembling the components together at the desired location.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority to U.S. Provisional Patent
Application No. 62/549,915 filed Aug. 24, 2017 and titled
"Breaching System." The entire contents of the above-identified
priority application are hereby fully incorporated herein by
reference.
TECHNICAL FIELD
[0002] The invention described herein relates to an explosive
detonating system and, more particularly, to an explosive
detonating system having one or more connectable components to
connect/disconnect the pathway that initiates an explosion.
BACKGROUND
[0003] Explosives are used in many modern-day applications. For
example, explosives are used in building or other demolition, earth
movement for construction, and military applications. Military and
law enforcement applications include breaching doors, walls,
bulkheads, and other structures. For example, the goal may be to
gain rapid entry to a fortified compound or to remove an obstacle
for a tactical advantage. In operation, explosives are placed in
position and then detonated from a safe distance.
[0004] In a conventional explosive initiation sequence, an ignition
device, such as a pen flare gun, is utilized to ignite a main
explosive charge. The ignition device fires percussion caps, for
example shot gun primers, to initiate the explosive process. The
shotgun primers transmit an initiating signal along a stand-off
device, such as electrical wire, "shock-tube," time fuse, or
detonating cord to a blasting cap. When activated by the initiating
signal, the blasting cap detonates the main explosive charge.
[0005] The shock tube allows a user to distance himself from the
main explosive charge and also to lower the amount of explosive
needed to detonate a charge. The shock tube may be a shock tube,
such as NONEL.RTM.. Shock tube is a hollow extruded tube containing
a thin layer of energetic materials on its inner diameter. Once
initiated, the shock tube transmits a signal to a detonating output
charge, typically incorporating an instantaneous output or a
pre-determined delay. Such a shock tube is "non-electric," so an
electric current is not transmitted to the detonator.
[0006] In conventional systems, detonators, such as blasting caps,
are crimped onto one end of the shock tube. When the firing impulse
is delivered from the primers, the shock tube ignites the blasting
caps. The blasting caps are taped or affixed to a loop of
detonating cord or directly to the explosive charge. Detonating
cord typically is a flexible plastic tube filled with an explosive
material, such as PETN or similar explosive material. The blasting
caps ignite the explosive material in the detonating cord, which
explodes along the length of the cord to ignite the main explosive
charge.
[0007] In conventional systems, a user is in proximity to the
explosives throughout the configuration, transportation, and
deployment process. The systems are typically configured at a
central location and transported assembled to a desired location.
If the pen flare gun accidentally fires a primer, such as during
transport, the entire explosive sequence starts, resulting in an
explosion that may injure the operator(s) and/or compromise the
mission. Additionally, in conventional systems, when an operator
desires to perform multiple detonations, the operator must
transport multiple pen flare guns attached to multiple, independent
explosive systems.
SUMMARY
[0008] This description relates to an explosive detonating system
having one or more connectable components to connect/disconnect the
pathway that ignites an explosion. The components comprise a firing
actuator that activates primers (percussion caps), an adapter that
connects the firing actuator to shock tube and channels the
ignition force into the shock tube, a cap box that houses blasting
caps coupled to the end of the shock tube, and a priming well that
is coupled to the blasting caps and the detonating cord. When the
firing actuator is initiated, the percussion caps ignite sending an
explosive wave into the adapter, which channels the wave into the
shock tube and ignites the shock tube. The explosive wave travels
through the shock tube and activates the blasting caps housed in
the cap box and inserted into the priming well, which activate the
detonating cord in the priming well. Then, the detonating cord
activates a main explosive charge. The main explosive charge is
placed in a location to provide a desired effect from the resulting
explosion. For example, the system may be employed as a breaching
system to breach structures or other suitable applications.
[0009] These and other aspects, objects, features, and advantages
of the invention will become apparent to those having ordinary
skill in the art upon consideration of the following detailed
description of illustrated examples.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIG. 1 is an assembly drawing depicting components of the
explosive detonating system in exploded form, in accordance with
certain examples.
[0011] FIG. 2 is an illustration depicting the assembled explosive
detonating system, in accordance with certain examples.
[0012] FIG. 3 is a perspective, cut-out view depicting a firing
actuator or device or shock tube initiator, in accordance with
certain examples.
[0013] FIG. 4 is a perspective view depicting a shock tube adapter,
in accordance with certain examples.
[0014] FIG. 5 is a perspective view showing assembly of a two-piece
shock tube adapter and shock tube, in accordance with certain
examples.
[0015] FIG. 6 is a perspective view depicting the shock tube
adapter connected to the firing actuator, in accordance with
certain examples.
[0016] FIG. 7 is a cross-sectional view depicting the shock tube
adapter connected to the firing actuator, in accordance with
certain examples.
[0017] FIG. 8 is an assembly diagram depicting the blasting caps,
cap box, priming well, and detonating cord in position for
assembly, in accordance with certain examples.
[0018] FIG. 9 is an assembly diagram depicting insertion of the
detonating cord in the priming well and insertion of the blasting
caps in the cap box, in accordance with certain examples.
[0019] FIG. 10 is an assembly diagram depicting the blasting
caps/cap box and the detonating cord inserted into the priming
well, in accordance with certain examples.
[0020] FIG. 11 is a perspective view of one half of a priming well,
in accordance with certain examples, in accordance with certain
examples.
[0021] FIG. 12 is a perspective view depicting a low profile
version of a priming well, in accordance with certain examples.
[0022] FIG. 13 is an exploded view depicting the components of the
low profile priming well of FIG. 12, in accordance with certain
examples.
DETAILED DESCRIPTION
[0023] Turning now to the drawings, in which like numerals
represent like (but not necessarily identical) elements throughout
the figures, the innovations are described in detail.
[0024] This description relates to an explosive detonating system
having one or more connectable components to connect/disconnect the
pathway that ignites an explosion. The components comprise a firing
actuator that activates primers (percussion caps); an adapter that
connects the firing actuator to shock tube and channels the
ignition force into the shock tube; a cap box that houses the
blasting caps coupled to the end of the shock tube; and a priming
well that is coupled to detonating cord or an explosive charge or
material. When the firing actuator is initiated, the percussion
caps ignite sending an explosive wave into the adapter, which
channels the wave into the shock tube and ignites the shock tube.
The explosive wave travels through the shock tube and activates the
blasting caps housed in the cap box and inserted into the priming
well, which activate the detonating cord in the priming well. Then,
the detonating cord activates a main explosive charge. The main
explosive charge is placed in a location to provide a desired
effect from the resulting explosion. For example, the system may be
employed as a breaching system to breach structures or other
suitable applications.
[0025] The explosive detonating system includes a quick
connect/disconnect between the primer firing actuator and the shock
tube. This part of the explosive detonating system comprises the
firing actuator, primers, and an adapter cartridge that connects
one end of the shock tube to the firing actuator.
[0026] The explosive detonating system also includes a quick
connect/disconnect between the blasting caps coupled to the other
end of the shock tube and the detonating cord that is attached to
the main explosive charge. This part of the explosive detonating
system includes a cap box and a priming well.
[0027] The explosive detonating system can allow an operator to
easily and quickly connect/disconnect the components. In this
manner, the operator can transport or store a disassembled
explosive system that is not in a position to fire accidentally.
Then, the operator can connect the system components together when
desired with minimal delay. For example, the operator can connect
the components of the system when at a location to be breached,
thereby not transporting an armed system that could fire
accidentally.
[0028] The explosive detonating system also can reduce a
possibility of the explosive system initiating prematurely compared
to conventional systems, which lessens the danger to the operator
and bystanders. This benefit is created because the explosive
detonating system is disconnected between the primer firing
actuator and the shock tube, as well as between the blasting caps
and the detonating cord until the operator is ready to initiate the
main explosive charge.
[0029] Additionally, a single firing actuator for firing the
blasting caps can be used for multiple explosive detonating
systems. The reusable firing actuator described herein lessons the
burden of transporting multiple firing actuators, or other shock
tube initiators, to the breaching location.
[0030] FIGS. 1 and 2 are illustrations depicting an explosive
detonating system 100, in accordance with certain examples. FIG. 1
is an assembly drawing depicting components of the explosive
detonating system 100 in exploded form, in accordance with certain
examples. FIG. 2 is an illustration depicting the assembled
explosive detonating system 100, in accordance with certain
examples.
[0031] The explosive detonating system 100 comprises a firing
actuator 102 that activates one or more primers (not visible in
FIGS. 1 and 2; see item 402 of FIG. 4).
[0032] A shock tube adapter 104 connects the firing actuator 102 to
one end of shock tube 106. The shock tube 106 is inserted into one
end of the shock tube adapter 104. The shock tube 106 typically
comprises two tubes for redundancy. One or both of the tubes can be
uses as desired. The other end of the shock tube adapter 104 is
insertable into and removable from the firing actuator 102 and
mechanically locks to the firing actuator 102. The shock tube
adapter 104 provides a connect/disconnect between the primers and
the shock tube 106 and the primers/shock tube 106 and the firing
actuator 102. Although not depicted in FIG. 1, the shock tube
adapter can comprise a removeable cap that covers and protects the
primers from being struck during transport. The cap can be formed
from a plastic, rubber, or other suitable material.
[0033] Blasting caps (not visible in FIGS. 1 and 2; see item 802 of
FIG. 8) are connected to the other end of the shock tube 106. For
example, the blasting caps can be crimped or otherwise mechanically
fastened to the shock tube 106.
[0034] As depicted in FIGS. 1 and 2, the blasting caps can be
inserted into a cap box 108. The cap box 108 protects the blasting
caps during storage and/or transport of the blasting caps.
Additionally, the cap box 108 facilitates coupling the blasting
caps to detonating cord 112 via a priming well 110. Although not
depicted in FIG. 1, the cap box can comprise a removeable cap or
other cover that covers and protects the blasting caps from being
struck during transport. The cap can be formed from a plastic,
rubber, or other suitable material.
[0035] The priming well 110 retains the blasting caps on the shock
tube 106 in proximity to the detonating cord 112. The blasting caps
and one end of the detonating cord are inserted into the priming
well 110. The priming well 110 is designed such that insertion of
the blasting caps and the detonating cord 112 into the priming well
110 fixes the blasting caps and the detonating cord 112 in close
proximity. For example, the blasting caps and the detonating cord
112 can be inserted into the priming well 110 such that the
blasting caps are close enough to the detonating cord 112 to
initiate the detonating cord 112 when the blasting caps are
initiated. The priming well 110 can retain the blasting caps in
contact with the detonating cord 112 prior to initiation of the
blasting caps. In this configuration, initiation of the detonating
cord 112 by the blasting caps is more reliable. However, the
priming well 110 also may retain the blasting caps in proximity to
the detonating cord 112 without physical contact between the
blasting caps and the detonating cord 112. In this configuration,
the gap between the blasting caps and the detonating cord 112 is
maintained at a distance that is not more than a distance that will
allow the blasting caps to initiate the detonating cord 112.
[0036] The other end of the detonating cord 112 is coupled to a
main explosive charge 114. The main explosive charge 114 may not be
utilized if the explosive force of the detonating cord 112 is
sufficient to achieve the desired result.
[0037] The priming well 110 provides a connect/disconnect between
the blasting caps coupled to the shock tube 106 and the detonating
cord 112 that is attached to the main explosive charge 114.
[0038] In operation, initiation of the primers by the firing
actuator 102 introduces an explosive ignition wave from the primers
into the shock tube 106, via the shock tube adapter 104. The
explosive wave traveling through the shock tube 106 initiates the
blasting caps, which are held in proximity to the detonating cord
112 via the priming well 110. Initiation of the blasting caps
initiates the detonating cord 112. Then, the detonating cord 112
initiates the main explosive charge 114.
[0039] The firing actuator 102 will now be described with reference
to FIG. 3. FIG. 3 is a perspective, cut-out view depicting a firing
actuator 102, in accordance with certain examples.
[0040] The firing actuator 102 comprises a housing 301 in which
multiple components are positioned. A trigger 302 that works in
conjunction with one or more hammers 304 mechanically moves one or
more corresponding firing pins 308. A trigger reset spring 303
biases an upper portion of the trigger 302 toward the hammers
304.
[0041] As shown in FIG. 3, the hammers 304 are depicted in a "safe"
position. As the hammers 304 are cocked by movement in direction A,
a lower portion of the hammers 304 pushes an upper portion of the
trigger 302 against the trigger 302 reset spring until the hammers
304 lock in the cocked position via engagement of the components
302a of the trigger 302 and 304a of the hammers 304. A hammer
torsion spring 306 biases the hammers 304 in a direction opposite
of the direction A. The trigger 302 and hammers 304 are held in the
cocked position by the biasing force of the trigger reset spring
303 and the hammer torsion spring 306 that engage the components
302a of the trigger 302 and 304a of the hammers 304.
[0042] When the operator pulls the trigger 302 in the direction B,
the upper portion of the trigger 302 moves away from the lower
portion of the hammers 304 thereby disengaging the components 302a
of the trigger 302 and 304a of the hammers 304. The biasing force
of the hammer torsion spring 306 moves the hammers 304 in a
direction opposite the direction A with sufficient force to move
one or more corresponding firing pins 308 in a direction C.
Corresponding firing pin reset springs 310 bias the firing pins 308
in a direction opposite the direction C. As the hammers 304 move in
the direction opposite of direction A, the hammers 304 strike the
corresponding firing pins 308 with a force sufficient to overcome
the biasing force of the firing pin reset springs 310 to cause the
firing pins 308 to contact one or more primers (not depicted in
FIG. 3) positioned adjacent to the firing pins 308. Another version
of the firing actuator 102 comprises a double-action trigger
system. In this case, the hammers 304 do not have to be cocked.
Pulling the trigger 302 will initially move the hammers 304 in the
direction A. Further pulling of the trigger 302 will then release
the hammers 304 to move in the direction opposite the direction A
to actuate the primers. Additionally, multiple triggers 302 may be
provided such that each hammer 304 has a corresponding trigger 302
that actuates that hammer 304.
[0043] Although not depicted in FIG. 3, a hammer and firing pin may
be combined into a single component. For example, the hammer may
have a firing pin formed as part of the hammer. In operation of
this design, when the hammer is released from the cocked position,
the firing pin on the hammer directly strikes the primer. This
operation contrasts to the hammer striking the firing pin, and then
the firing pin striking the primer. The firing pin reset springs
310 may be omitted in this design. A single hammer may have two
integrally formed firing pins. Two hammers having corresponding
integrally formed firing pins may also be utilized.
[0044] An ejection latch 316 and ejection pin 312 allow insertion
and removal of the shock tube adapter 104 into the firing actuator
102. The ejection latch 316 pivots around a pin 318 coupled to the
housing 301. An ejection latch spring 315 biases one end of the
ejection latch 316 around the pin 318 in a direction D, which
biases an opposite end of the ejection latch 316 in a direction E.
As the shock tube adapter 104 is inserted into the firing actuator
102, the shock tube adaptor 106 contacts a tab 316a on the ejection
latch 316. This contact moves the tab 316a of the ejection latch
316 in a direction opposite to direction E, which moves the
opposite end 316b of the ejection latch 316 around the pin 318 in a
direction opposite of the direction D and against the biasing force
of the ejection latch spring 315. When the shock tube adapter 104
is inserted fully into the firing actuator 102, the biasing force
of the ejection latch spring 315 moves the corresponding end 316b
of the ejection latch 316 in the direction D, which moves the tab
316a in the direction E to engage with a retaining indent (not
illustrated in FIG. 3; see item 504c of FIG. 5) of the shock tube
adapter 104. This engagement locks the shock tube adapter 104 in
position in the firing actuator 102. Additionally, when the shock
tube adapter 104 is inserted into the firing actuator 102, the
shock tube adaptor 104 moves the ejection pin in a direction
opposite the direction C against a biasing force of an ejection
spring 314.
[0045] Although not depicted in FIG. 3, the ejection pin and
ejection spring may be replaced with an ejection spring that pushes
directly on the shock tube adapter 104. This ejection spring may be
fixed in place such that insertion of the shock tube adapter 104
compresses the ejection spring, and the biasing force of the
ejection spring pushes the shock tube adapter 104 from the firing
actuator 102 when the ejection latch 316 is released.
[0046] To remove the shock tube adapter 104 from the firing
actuator 102, the operator pushes an end 316b of the ejection latch
316 in a direction opposite the direction D against the biasing
force of the ejection latch spring 315. This operation moves the
tab 316a of the ejection latch 316 in a direction opposite to the
direction E to disengage the tab 316a of the ejection latch 316
from the retaining indent of the shock tube 106 adaptor. The
biasing force of the ejection spring 314 moves the ejection pin 312
in the direction C to push the shock tube adaptor 104 from the
firing actuator 102.
[0047] Various options for implementing the firing actuator 102 are
suitable. For example, the firing actuator 102 may comprise a
single hammer or multiple hammers 304 and a corresponding single
firing pin or multiple firing pins 308. Additionally, a single
hammer may be sized to contact both firing pins. If two hammers are
utilized, they may be linked together to operate as a single
hammer. For example, a pin may be inserted through apertures or
slots in both hammers to link the two hammers together. In this
case, movement of one hammer results in corresponding movement of
the other hammer. The pin can be slideable from one hammer into the
other hammer, such that operation of one hammer independently of
the other hammer is possible if desired and operation of both
hammers as a single unit is possible if desired. Other mechanisms
for releasing the hammers 304 from the cocked position may be
utilized. If the ejection spring 314 and ejection pin 312 are not
used, the operator may manually pull the shock tube adapter 104
from the firing actuator 102. Other latching arrangements may be
utilized to retain the shock tube adapter 104 in the firing
actuator 102. For example, the ejection latch 316 and ejection
latch spring 315 may be positioned on the shock tube adapter 104 to
engage with a corresponding retaining indent on the firing actuator
102. The ejection latch 316 may be integral to the firing actuator
102 or the shock tube adapter 104. In this case, the ejection latch
spring 315 may be omitted because the elastic force of the ejection
latch 316 will bias the ejection latch 316 in position. One or
multiple ejection latches may be used.
[0048] The firing device comprises two independent firing sides
operated at least by one trigger 302. The operator can cock both
hammers 304 or one hammer, and the single trigger 302 will release
one hammer 304 or both hammers 304 simultaneously, depending on the
number of cocked hammers. This operation allows the operator to use
one initiating device for either single or dual primed charges.
[0049] The shock tube adapter 104 will now be described with
reference to FIGS. 4 and 5. FIG. 4 is a perspective view depicting
a shock tube adapter 104, in accordance with certain examples. FIG.
5 is a perspective view showing assembly of a two-piece shock tube
adapter 104 and shock tube 106, in accordance with certain
examples.
[0050] As shown in FIGS. 4 and 5, the shock tube adapter 104
comprises a primer case 404 and a shock tube case 406. The shock
tube 106 is inserted into and retained by the shock tube case 406.
Primers are inserted into the primer case 404. The shock tube case
406 and the primer case 404 couple together to form the shock tube
adapter 104.
[0051] With reference to FIG. 5, the primer case 404 comprises a
primer housing 504a having continuous apertures 504b extending
through the primer housing 504a. The apertures 504b are sized to
receive the primers 402. The apertures 504b may retain the primers
402 therein via compression fit. The primers 402 also may be
adhered into the apertures 504b, mechanically retained therein, or
otherwise fixed in position. For example, a retainer clip may be
utilized to retain the primers 402 in the apertures 504b. The
primer apertures 504b open into an expansion chamber (not visible
in FIG. 5; see item 702 of FIG. 7) leading to both shock tubes,
thereby allowing either primer charge to initiate one or both shock
tubes.
[0052] The primer case 404 further comprises a retaining indent
504c. The retaining indent 504c receives the tab 316a of the
ejection latch 316 of the firing actuator 102 (as described
previously with reference to FIG. 3) when the shock tube adapter
104 is inserted into the firing actuator 102 (as described
previously with reference to FIG. 3).
[0053] The primer case 404 further comprises at least one retaining
tab 504d. The tab 504d engages a corresponding retaining indent
506d in the shock tube case 406 to latch the primer case 404 and
the shock tube case 406 together. While only one tab 504d is
visible, the primer case 404 may include multiple tabs 504d. For
example, the primer case 404 may include two tabs 504d on the top
and bottom of an end that faces the shock tube case 406.
Alternatively, the tabs may be located on the shock tube case 406
and engage with corresponding indents or apertures on the primer
case 404.
[0054] The shock tube case 406 comprises a shock tube housing 506a
having continuous apertures 506b extending through the shock tube
housing 506a. The apertures 506b are sized to receive the shock
tube 106.
[0055] The shock tube case 406 further comprises tabs 506c around
the apertures 506b. The shock tube 106 is inserted into the
apertures 506b at one end of the shock tube case 406, pushed
through the apertures 506b of the shock tube case 406, and at least
partially engage in the tabs 506c on an opposite end of the
apertures 506b in the shock tube case 406. The shock tube 106 may
extend past the tabs 506c of the shock tube case 406.
[0056] The tabs 506c are sized around the apertures 506b to allow
the shock tube 106 to pass therethrough. The tabs 506c are further
sized to mate in the aperture 504b of the primer case 404 when the
shock tube case 406 and the primer case 404 are attached together.
As the tabs 506c are inserted into the apertures 504b of the primer
case 404, the apertures 504b compress the tabs 506c of the shock
tube case 406 toward the center of the apertures 506b of the shock
tube case 406. This movement clamps the tabs 506c of the shock tube
case 406 around the shock tube 106 in the apertures 506b to retain
the shock tube 106 in the shock tube case 406. The apertures 506b
may retain the shock tube 106 therein via compression fit without
extending into the tabs 506c.
[0057] Connecting the shock tube case 406 and the primer case 404
connects the apertures 506b of the shock tube case 406 with the
apertures 504b of the primer case 404 to thereby create a
continuous path from the primers 402 through the apertures 504b
(and sometimes at least part of the apertures 506b) to the shock
tube 106. In this manner, an explosive wave created by initiation
of the primers 402 can travel to the shock tube 106. In one design,
the primer case 404 comprises an expansion chamber 702 (see FIG. 7)
that connects the apertures 504b of the primer case 404 with the
apertures 506b of the shock tube case 406. Both apertures 504b open
into the expansion chamber 702, and both apertures 506b open into
the expansion chamber 702. Accordingly, the expansion chamber 702
funnels the blast from a single percussion cap 402 to both
apertures 506b to initiate both lines of shock tube 106. Thus, if
only one primer fires, the expansion chamber 702 funnels the blast
to both lines of shock tube to ensure a dual system ignition. The
expansion chamber is optional, and each aperture 504b may directly
connect to a respective one of the apertures 506b. In this case,
each primer 402 will activate only a corresponding one of the shock
tubes 106.
[0058] The shock tube case 406 further comprises one or more
retaining indents 506d that correspond with the retaining tabs 504d
of the primer case 404. The retaining indents 506d receive the
retaining tabs 504d to connect the shock tube case 406 to the
primer case 404. The operator can push the retaining tabs 504d from
engagement with the retaining indents 506d to disconnect the shock
tube case 406 from the primer case 404.
[0059] Various options for implementing the shock tube adapter 104
are suitable. For example, the primer case 404 and shock tube case
406 may be formed integrally as a single piece. In this case, the
apertures can be continuous from the end in which the primers 402
are inserted to the opposite end in which the shock tube 106 is
inserted. This design also can incorporate the expansion chamber
702 between the primer end and the shock tube end of the primer
case 404. The apertures for receiving the shock tube 106 can be
tapered from the end in which the shock tube 106 is inserted to a
smaller area inside the shock tube case 406 or the shock tube
adapter 104. In this case, the shock tube adapter 104 retains the
shock tube 106 via compression as the shock tube 106 is inserted
into the shock tube adapter 104.
[0060] The two-piece design of the shock tube adapter 104 allows a
further separation of the primers 402 from the blasting caps,
detonating cord 112, and the main explosive charge 114. The primer
case 404 can be removed from the shock tube adapter 104 to
disconnect the primers 402 from the system. The primer also can be
carried separately and connected to the shock tube case 406 on
location. In another instance, the shock tube adapter can also be a
single assembly device in which percussion caps are inserted or
press fitted into the firing device end and shock tube is inserted
into the explosive end and secured with either a tightening nut, a
screw, or other suitable constricting device. The internal paths
from the percussion caps to the shock tube can either be straight
bore path from one percussion cap to one shock tube opening, or a
cross-bored path that intersects or an expansion chamber to allow
the explosion from one percussion cap to travel to both shock tube
openings. In another instance, the shock tube adapter can be two
pieces dissected horizontally creating two identical halves that
snap or glue or screw together into a single piece. In this
version, the shock tube adapter can have straight bore connects
from the percussion caps to the shock tube, or a crossed-bored path
or expansion chamber as previously described.
[0061] FIGS. 6 and 7 depict the shock tube adapter 104 engaged with
the firing actuator 102. FIG. 6 is a perspective view depicting the
shock tube adapter 104 connected to the firing actuator 102, in
accordance with certain examples. FIG. 7 is a cross-sectional view
depicting the shock tube adapter 104 connected to the firing
actuator 102, in accordance with certain examples.
[0062] The shock tube adapter 104 is inserted into the firing
actuator 102 housing until the tab 316a of the ejection latch 316
of the firing actuator 102 engages the retaining indent 504c of the
primer case 404 of the shock tube adapter 104.
[0063] Additionally, as shown in FIGS. 6 and 7, a stock 602 can be
coupled to the firing actuator 102. The stock 602 may allow easier
operation of the firing actuator 102 by the operator.
[0064] If only one primer 402 is loaded into the shock tube 106
adaptor, the firing actuator 102 will fire the single primer 402.
If two primers 402 are loaded into the shock tube 106 adaptor, the
firing actuator 102 will fire both primers 402.
[0065] The system can utilize two primers 402, two firing pins 308,
two shock tubes 106, and two blasting caps to create redundancy in
the system and to ensure detonation of the charge. This system is
referred to as dual priming. However, the system can be single
primed by using only one primer 402 and/or one shock tube 106
and/or one blasting cap.
[0066] In certain examples, the shock tube adapter 104 is formed
from plastic.
[0067] Operation of the shock tube adapter 104 is similar in
operation and design to a magazine in a conventional firearm. An
operator may load the shock tube 106 and primers 402 into the shock
tube adapter 104 and may load the shock tube adapter 104 into the
firing actuator 102.
[0068] The hammers 304 are cocked, and then the shock tube adaptor
104 is loaded into the firing actuator 102, and the firing device
is initiated when the operator pulls the trigger 302. The trigger
302 releases the hammers 304, which cause the two firing pins 308
to engage the primers 402 to ignite the shock tube 106.
[0069] The priming well 110 will now be described with reference to
FIGS. 8-11. FIG. 8 is an assembly diagram depicting the blasting
caps 802, cap box 108, priming well 110, and detonating cord 112 in
position for assembly, in accordance with certain examples. FIG. 9
is an assembly diagram depicting insertion of the detonating cord
112 in the priming well 110 and insertion of the blasting caps 802
in the cap box 108, in accordance with certain examples. FIG. 10 is
an assembly diagram depicting the blasting caps/cap box 108 and the
detonating cord 112 inserted into the priming well 110, in
accordance with certain examples. FIG. 11 is a perspective view of
one half of a priming well 110, in accordance with certain
examples.
[0070] The blasting caps 802 are attached to an end of the shock
tube 106. For example, the blasting caps 802 can be crimped to the
end of the shock tube 106.
[0071] The blasting caps 802 are inserted in to the cap box 108.
The cap box 108 allows connecting and disconnecting the blasting
caps 802 into the priming well 110. The cap box 108 also protects
the blasting caps 802 during storage and/or transport. Although not
depicted in FIG. 8, the cap box can comprise the removeable cap or
other cover that further covers and protects the blasting caps from
being struck during transport. This protection can maintain the
blasting caps 802 in proper working condition. This protection also
can prevent an inadvertent detonation of the blasting caps 802 by
accidental contact or abuse.
[0072] The cap box 108 comprises a cap box housing 108a having
apertures 108b extending from a first end of the cap box housing
108a through the cap box housing 108a. The apertures 108b are open
to an exterior of the cap box housing 108a as shown by reference
numeral 108c. A second end of the cap box housing 108a is closed.
However, the apertures 108a may continue through the second end of
the cap box housing 108a.
[0073] The blasting caps 802 are inserted into the apertures 108b
of the cap box housing 108a until the blasting caps 802 are
positioned inside the cap box housing 108a. The cap box housing
108a may retain the blasting caps 802 via compression fit. The cap
box housing may also, or alternatively, retain the blasting caps
802 via retaining tabs (not depicted in FIGS. 8-11) located at the
opening of the apertures 108b into the cap box housing 108a. In
this case, the blasting caps 802 move the retaining tabs outward
during insertion of the blasting caps 802 into the cap box housing
108a, and the tabs spring around the end of the blasting caps 802
to hold the blasting caps 802 in position.
[0074] The cap box 108 further comprises one or more cap box
retaining latches 108d coupled to the cap box housing 108a. The cap
box retaining latches 108d can be integrally formed with the cap
box housing 108a and connect to the cap box housing 108a at a pivot
point 108g. The cap box retaining latches 108d further comprise a
locking tab 108e at one end. The cap box retaining latches 108d may
further comprise a lever tab 108f Actuation of the lever tab 108f
moves the cap box retaining latch 108d about the pivot point 108g
to move the locking tab 108e away from the cap box housing
108a.
[0075] In certain examples, the cap box 108 is a single, plastic
part that houses the two blasting caps 802 and the end of the shock
tube 106. The cap box 108 may be 3D printed or produced by any
other plastic manufacturing process.
[0076] The cap box 108 serves at least three purposes. First, the
cap box 108 provides a quick connect/disconnect to insert the
blasting caps 802 into the priming well 110. Second, the cap box
108 protects the ends of the blasting caps 802, which are subject
to exploding when struck on a hard surface. The cap box also can be
inserted into a protective cover in a fast, disconnectable
fashion.
[0077] The top and bottom of the cap box 108 are typically left
open to allow the blasting caps 802 to have intimate contact with
the detonating cord 112 when the cap box 108 is inserted into the
priming well 110. The contact allows the blasting caps 802 to
ignite the detonating cord 112 more efficiently and reliably.
However, the top and bottom of the cap box 108 do not have to be
left open for the system to operate.
[0078] The priming well 110 comprises a priming well housing 110a
having a continuous aperture 110b and a continuous aperture 110c
extending therethrough. The aperture 110b receives the detonating
cord 112. The aperture 110c receives the cap box 108. The apertures
110b and 110c are oriented such that insertion of the detonating
cord 112 in aperture 110b and insertion of the cap box 108 in the
aperture 110c places the detonating cord 112 and the blasting caps
802 in proximity to each other. The detonating cord 112 may contact
the blasting caps 802 or otherwise be located at a distance that
will allow detonating of the blasting caps 802 to ignite the
detonating cord 112.
[0079] The priming well 110 further comprises one or more indents
(or apertures) 110e that receive the lever tab 108f of the cap box
latch 108d as the cap box 108 is inserted into the aperture 110c of
the priming well 110. In this manner, the cap box 108 can be
inserted in and retained by the priming well 110. Additionally, the
cap box 108 can be removed from the priming well 110 by action of
the lever tab 108f away from the priming well 110 to release the
lever tab 108e from the indent 110e of the priming well 110.
[0080] The priming well housing 110a may comprise protrusions 110f
extending from the priming well housing. These protrusions 110f can
facilitate attaching the priming well 110 to the detonating cord
112, the main explosive charge 114, or other fixture near the
desired location. For example, zip ties, straps, plastic tape,
rope, or other suitable material may be utilized with the
protrusions 110f to hold the priming well 110 in a desired
position.
[0081] As shown in FIGS. 9-11, the priming well 110 can be formed
in two halves, whereby the housing 110a comprises two components
1110 configured to attach together to form the priming well housing
110a. Each component 1110 may comprise one or more locking tabs
110d that mate with another component 1110 to lock the two halves
1110 together. FIG. 11 depicts one-half 1110 of a two-piece priming
well 110 in more detail. In addition to the priming well 110
components discussed previously, FIG. 11 depicts additional
features internal to the priming well 110.
[0082] Each component 1110 of the priming well housing 110a also
comprises retaining apertures 110i that receive corresponding
locking tabs 110d of the other component 1110 of the priming well
housing 110a to lock the two halves of the priming well housing
110a together. The apertures 110b and 110c are open to each other
internally in the priming well 110 as shown by reference number
110g. This opening allows the detonating cord 112 to be positioned
in proximity to the blasting caps 802 when the detonating cord 112
and the blasting caps 802 are inserted into the priming well 110.
Two components 1110 can be mated together to form the complete
housing 110a of the priming well 110.
[0083] The aperture 110b comprises one or more sloping portions
110h that are angled toward the aperture 110c. As the detonating
cord 112 is inserted into the aperture 110b of the priming well
110, the sloping portions 110h force the detonating cord 112 toward
the blasting caps 802. The positioning can ensure that the
detonating cord 112 is positioned in sufficient proximity to the
blasting caps 802 to allow detonation of the detonating cord 112 by
the blasting caps 802. The sloping configuration of the bottom of
the priming well 110 forces the detonating cord 112 upward into
close proximity to the blasting caps 802, which may include contact
with the blasting caps 802. The close proximity and/or intimate
contact created by the forcing together of the detonating cord 112
and the blasting caps 802 causes the ignition of the detonating
cord 112 by the blasting caps 802 to be more reliable and
efficient. The likelihood that the blasting caps 802 will fail to
ignite the detonating cord 112 can be reduced.
[0084] The cap box 108 can be plugged into the priming well 110
from any orientation and direction allowing the operator to quickly
and intuitively connect the entire explosive system and back away
to a safe location. The priming well 110 is designed with redundant
configurations on both ends of the priming well 110. Accordingly,
the operator may insert the cap box 108 in either end of the
priming well 110 and may insert the detonating cord 112 in either
end of the priming well 110. A simpler design also is suitable. For
example, the priming well 110 can be configured on one end to
receive only the cap box 108 and on another end to receive only the
detonating cord 112.
[0085] The priming well 110 can retain the detonating cord 112 via
a compression fit. For example, an area of the aperture 100b can
taper to a smaller area inside the priming well 110 such that
insertion of the detonating cord 112 compresses the detonating cord
112 inside the aperture 110b. Another method of securing the
detonating cord comprises annular ridges along the length of the
detonation chord path through the priming well 110 to physically
engage the detonation cord.
[0086] Other configurations of the priming well 110 are suitable.
For example, if the cap box 108 is not used, the aperture 110c can
be sized to directly accommodate the blasting caps 802. The
blasting caps 802 and/or the cap box 108/blasting caps 802
combination can be stored and/or transported in the priming well
110. In this manner, the priming well 110 can protect the blasting
caps 802 during storing and or transport. The aperture 110b can be
formed without the sloping portions 110h. In this case, the
apertures 110b and 110c can be formed such that the detonating cord
112 and blasting caps 802 are positioned in suitable proximity
without forcing the detonating cord 112 toward the blasting caps
802. The priming well 110 can be formed without the protrusions
110f. The priming well 110 can be formed as a single-piece
construction.
[0087] FIGS. 12 and 13 depict an alternative construction of the
priming well 110. FIG. 12 is a perspective view depicting a priming
well 1200, in accordance with certain examples. FIG. 13 is an
exploded view depicting the components of the priming well 1200 of
FIG. 12, in accordance with certain examples.
[0088] The priming well 1200 comprises an upper housing 1202 and a
lower housing 1204. Apertures 1202a of the upper housing 1202
receive tabs 1204a of the lower housing 1204 as the upper housing
1202 and the lower housing 1204 are mated together. The tabs 1204a
engage the apertures 1202a to connect the upper housing 1202 and
the lower housing 1204. The upper housing 1202 and the lower
housing 1204 can be disconnected from each other by pushing the
tabs 1204a into the apertures 1202a to release the engagement.
[0089] The priming well 1200 further comprises the features
discussed previously with reference to FIGS. 8-11, except for the
components that connect the two halves of the priming well
housing.
[0090] In operation of the explosive detonating systems 100
described herein, the detonating cord 112 from the main explosive
charge 114 is inserted into the priming well 110. In a typical
configuration, the priming well 110 is attached to, or hanging
from, the main charge.
[0091] The operator plugs the cap box 108 into the priming well
110. The operator plugs the shock tube adapter 104 into the firing
actuator 102. The firing actuator 102 is unable to initiate the
firing system until all of the components of the full system are
connected to one another in the described manner and the hammers
304 are cocked.
[0092] The explosive detonating system 100 allows the operator to
quickly connect/disconnect from the explosive system at two
critical interfaces, at the shock tube adapter 104 and at the
priming well 110. Only when the entire system is fully assembled
(typically at the desired location for the explosion) is the system
ready (or capable) for operation. This configuration allows for
safer transport and storage of the system. In contrast,
conventional systems are configured before transportation to a
desired location because the components do not disassemble.
[0093] To initiate the system, the operator assembles the
components as described above. The operator affixes the detonating
cord 112 from the priming well 110 to the main explosive charge
114. The operator transports the firing actuator 102 away from the
main explosive charge 114 to a distance controlled by the length of
the shock tube 106. For example, the operator may use twenty feet
of shock tube 106 to allow the operator to pull the trigger 302 of
the firing actuator 102 twenty feet away from the main charge.
Therefore, when the main charge explodes, the operator is in a
safer location.
[0094] Although described herein as "shock tube" 106, any suitable
stand-off device may be utilized. For example, the stand-off device
can be electrical wire, shock-tube, time fuse, detonating cord, or
other suitable stand-off device.
[0095] In alternate examples, the firing actuator can be actuated
via a remote laser, or other remote signaling technology, such as
radio frequency or infrared. For example, the firing actuator
houses a laser or radio frequency (RF) system or a combination of
both having an encoded signal. The shock tube adapter comprises a
laser and/or RF receiver. This configuration allows the operator to
remotely detonate the explosives from a safer distance from the
explosives.
[0096] The remote device can have the same mechanical mechanism
that the firing actuator described herein provides, including two
striking mechanisms. However, instead of attaching the hand-held
firing actuator and then being tethered to the charge, the remote
device is activated with a coded signal on the hand-held
device.
[0097] The charge is single or double primed, then the remote
device is cocked. Then, a light illuminates to show the operator
that the remote device is active. The operator connects the remote
device to the shock tube adapter. The operator moves to a safe
location and aims the hand-held device at the remote device and
transmits the encoded signal from the hand-held device. The remote
device may be configured to change to another color (red) and flash
three times before activating the explosive charge.
[0098] The remote device provides multiple benefits. First, this
device allows the operator to make adjustments that the shock tube
may not be able to reach, thus, allowing the operator some
flexibility in choosing a better cover position. Second, this
device can have a time delay mode, so the operator can place the
charge in one location and activate it, then move to another
location and place another charge. When activated, the time delay
prevents detonation for a configured amount of time or until the
encoded signal is transmitted. This capability gives the operator
much more flexibility.
[0099] Further, conventional systems limit the distance that an
operator must be from the explosion based on the length of shock
tube used in the charge. For example, if ten feet of shock tube is
used between the shock tube adapter and the cap box, then the
operator is only able to fire the system from approximately ten
feet away. Additionally, shock tube can become tangled, which may
limit or prevent its effective operation. In this alternative
example, the operator may only require six inches of shock tube
because the operator is able to trigger the system from any
distance afforded by the effective range of the coded signal.
Furthermore, if the signal is an RF signal, they can effectively
initiate the device without being in the line of sight.
Additionally, an RF signal would work through smoke, dust, fog,
and/or heavy rain.
[0100] This encoded signal system securely allows a placed charge
to be detonated from much greater distances than is practical with
shock tube during breaching operations. It can also better
facilitate coordinated or command controlled situations. The effect
of larger distances between personnel and detonations reduces the
physical effects of the blast on personnel and can allow better
cover and concealment thereby increasing safety.
[0101] The Remote Firing Device System (RFDS) uses a hand-held
Transmitter Device (TD) that, upon illuminating a target on a
charge that is equipped with a like coded Receiver-Detonator,
detonates the charge. To avoid certain jamming techniques employed
against the system, in certain operations, the RFDS utilizes a
specific frequency containing a transmitted code.
[0102] During operations, the Receiver-Detonator (R-D) is not armed
until the charge is placed in the desired location. The operator
turns the power button to "On," and a light will illuminate the
receiver window. The operator cocks the R-D, and the light will
change color or intensity. Only then will the operator connect the
R-D to the charge. Once the charge has been placed and the remote
detonator is armed, the operator can move away from the charge to a
position of safety. From a safe position the operator can activate
the R-D unit by aiming the encoded transmitting device at the R-D
and transmit the encoded initiation signal. Once the R-D receives
the code, it will activate a second count down to detonation.
[0103] The Remote Firing Device System consists of two assemblies:
First, A Remote Firing Device (RFD) that emits the encoded
detonating signal from a position of safety and concealment. The
RFD contains the transmitter and driving electronics to send a
preprogrammed secure firing code to the remote detonator. The
firing device will look and act much like a small hand gun to allow
the transmitter to be aimed. Second, A Receiver-Detonator (R-D)
that ignites an electric spark, initiates an electronic trigger, or
actuates an electronically secured spring actuator which engages a
firing pin to strike a percussion cap and ignite a redundant or
single shock tube. The shock tube is attached to a standard
blasting cap. The shock tube can be of any length allowing the
placement of the R-D in a position that can be viewed from position
of cover and concealment for detonation.
[0104] Certain components of the systems described herein can be
combined with portions of other systems and still achieve benefits
of the described systems. For example, the priming well can be
incorporated into a system using a conventional firing device or
other firing device. In this case, the system may be connected and
disconnected between a fire mode and a safe mode by connecting and
disconnecting the blasting caps from the priming well and/or the
detonating cord from the priming well. Additionally, the shock tube
adapter can be incorporated into a system using a conventional
method and components to connect the blasting caps to the
detonating cord. In this case, the system may be connected and
disconnected between a fire mode and a safe mode by connecting and
disconnecting the shock tube adapter from the firing device and/or
the shock tube case from the priming well case.
[0105] The components and systems described herein can be formed of
any suitable material. A person having ordinary skill in the art
and the benefit of this disclosure will understand that multiple
options exist for manufacturing the components and systems
described herein. For example, the components may be formed of
plastic and injection molded, 3-D printed, or otherwise formed is
integral or multi-component parts. The components also may be
formed partially or entirely of other materials, such as metals.
Individual components described herein may be formed of multiple
parts formed from the same or different materials and assembled
together.
[0106] The example systems, methods, and components described in
the embodiments presented previously are illustrative, and, in
alternative embodiments, certain components can be combined in a
different order, omitted entirely, and/or combined between
different example embodiments, and/or certain additional components
can be added, without departing from the scope and spirit of
various embodiments. Accordingly, such alternative embodiments are
included in the scope of the following claims, which are to be
accorded the broadest interpretation so as to encompass such
alternate embodiments.
[0107] Although specific embodiments have been described above in
detail, the description is merely for purposes of illustration. It
should be appreciated, therefore, that many aspects described above
are not intended as required or essential elements unless
explicitly stated otherwise. Modifications of, and equivalent
components or acts corresponding to, the disclosed aspects of the
example embodiments, in addition to those described above, can be
made by a person of ordinary skill in the art, having the benefit
of the present disclosure, without departing from the spirit and
scope of the invention defined in the following claims, the scope
of which is to be accorded the broadest interpretation so as to
encompass such modifications and equivalent structures.
* * * * *