i'eldof the invention
The present invention relates to a portable permanent defence equipment, particularly
a bullet proof retrievable fighting cum living bunker for providing protection to
soldiers in defence on International Borders, Central Para-Military Forces and State
Police Departments in their respective areas engaged in counter insurgency operations
& fighting nexals.
Background of the invention
The army (Defence) used an old concept of concrete and cement bunkers to prepare
the permanent defence at International Borders (IB) and the Line of Control (LOC),
the Central Para-Military Forces and State Police Departments are completely devoid
of any such product to ensure their safety and security against the enemy's fire of
small weapons. The bunker's used by army not only takes a considerable time for
construction but are also highly vulnerable to the destruction by the enemy at the
construction stage as the same becomes an easy target for the enemy. The threat
perception keeps changing fiom time to time and place to place. The permanent
defence bunkers can't be relocated to the desired areas due to the inherent nature of
the constructions hence a limitation. In this situation, the bunkers are to be abandoned
which entails loss of labour and finances. There is also a likelihood of this so called
abandoned bunker falling in the hands of enemy troops I militants I extremists I
nexals. One of the live example of this situation is KARGIL events.
The disadvantage of the bunkers mentioned in the prior art are lack of availability of
skilled people for construction, cannot be employed in all weather conditions and no
flexibility to shift the same to another location as per the requirements.
Despite the aforementioned disadvantages, there is a need to develop a portable bullet
proof retrievable fighting and living bunker that can be employed in all types of
terrain and weather conditions and provide flexibility to shift the location of the
bunker whenever required. Moreover, the bunker provides protection to soldiers on
the borders and security to the Central Para-Military Force and State Police
Departments against enemy fire of small weapons.
Objective of the Invention
Forces when operating in hostile environment must be confident of personal safety
and survival to contest the militants or enemy assault from across the border boldly.
IQB ELH HI, 17 - 11 - 2694 17: 1 2 0
-
2
~ oCrI Operations the forces need to establish network of nodes within striking
distance to each other to check and trap militants operating in the area.
In order to meet this objective, a portable Bullet Proof Fighting and Living Bunker has
been invented to provide all round protection. It is easy to construct and can be swiftly
transported fkom one location to another whenever required after dismantling
considering instant threat perceptions.
Another objective of the present invention is to provide a portable bunker which if
damaged during the firing can also be repaired by the inmates without exposing
themselves to the onslaught of fires.
Another objective of the present invention is to provide a portable bunker, which is
easy to dismantle and can be employed in all types of terrain and weather conditions.
Another objective of the present invention is to provide a portable bunker that can
accommodate 4-6 jawans for extended period of time.
Still, another objective of the present invention is to provide a portable bunker which
is economical, simple in design and user fi-iendly.
Summary of the Invention
The present invention relates to a portable Bullet Proof Fighting and Living Bunker
for providing complete protection against fire assault of infantry small arms including
artillery shell splinters to Forces involved in counter insurgency operations or
conventional warfare. It can be employed in all types of terrain and weather
conditions, and provides the defence personnel flexibility to shift location according to
the requirements. It even provides security to the Central Para-Military Force and
State Police Departments against enemy's fire of small weapons.
The improved portable bunker, comprises of an integrated structure with plurality of
members having a fiont, back, right and left wall to form a chamber , at least one door
made of plurality of metallic bullet proof panels coupled with right wall of the
chamber and a bullet proof gallery.
Brief description of the drawings
Figure 1 illustrates line diagram of the bunker.
Figure 2 illustrates the various sections of the bunker with measurements.
- - - IBa ~ E L H17~ - 1 .1-2 014 17;P a
3
Detailed Description of Drawings
Figure 1 illustrates the bunker denoting the following
A - Front wall
B - Back wall
C - Right wall
D - Left wall
E - Gallery
Figure 2, illustrates the three sections of the bunker including the door (2a), fiont
panel (2b) and the gallery (2c) along with their respective measurements. A side view
of the bunker 2 (d) is also illustrated herein.
Detailed description of the Invention
As illustrated in Fig 1, the present invention relates to a portable bullet proof fighting
and living bunker that can be employed in all types of terrain and weather conditions
and has flexibility to shift its location as the battle progresses. It provides an excellent
field of fire while providing all round protection fiom small arms fire.
According to a preferred embodiment of the present invention is to provide a portable
bullet proof fighting and living bunker , comprising a fighting chamber, a door, a
Bullet Proof gallery, plurality of metallic Bullet Proof panels, a metallic roof, a floor
at least one firing slot and a shutter.
The bunker structure is integrated with steel members supported on load bearing
columns further interconnected with roof and floor beams, braced to each other with
nuts and bolts. The structure is modular in nature with provision for interchangeability
of protective bullet proof Panels. All the structural members are to be made of
relevant IS Specifications materials. The load bearing vertical columns as well as
horizontal beams are made out of hollow MS square pipe Size, 80x80~4. 0rnm thick.
The ends of columns are welded with 6.0-8.0mm thick gusset plates with holes, for
fixing with floor and roof beams. Suitable holes are provided to see the complete
XPQ, DELHX 17-II-2Dl4 r7.;zn 4
I skcture with nuts and bolts of strength class 81 8.8 or made of anticorrosive steel
grade AISI 202.
According to another embodiment of the present invention, bunker is made up of thick
square shaped pipes. The size of the fighting chamber is 9 - 13 feet in length, 8 - 10
feet in breadth and 6 - 8 feet in height with a single door at the rear side of the
chamber. The door is made of three metallic Bullet Proof panels so as to control the
weight viz a viz single panel door. It also gives an advantage that if any of the door
panel gets stuck I blocked, then the occupant of the bunker can come out through the
other panel which is not possible if it were a single panel door. The 2 - 3 feet Bullet
Proof gallery is open at both sides of the bunker and is provided as an extension of the
bunker. The gallery increases the size of the bunker. The gallery has distinct
advantage in case the passage get closed because of snow or landslides, the occupants
of the bunker can easily come out fiom the rear door in the gallery and clear the
passage. In case the gallery is not provided then there is every likely hood of the door
getting blocked in case of the snow fall I landslide.
The fiont portion of the bunker has three faces. Each face is provided with a firing slot
within the Bullet Proof shutter at a certain height above the floor. The bunker has
three firing slots. The two side faces are drawn at approximately 120" angle. The
shutter on opening acts as arm rest for occupant to fire his weapon. The metallic roof
is provided on the top of the fighting chamber and gallery. The roof is strong enough
to provide protection fiom environmental vagaries. The roof design of the bunker is
strengthened to withstand lOOcm of wet sand and dead load of additional 1000 kg (the
total load bearing capability obtained is up to 15 MT). A chequered mild steel plate of
certain thickness is used for flooring of the bunker.
According to another embodiment the bunker is fabricated by assembling standard
size Bullet Proof Panels or blocks made of steel using 'Nut Bolts' Technology. This
enables the occupant to replace the damaged Bullet Proof steel panels during the battle
without coming into open and exposing themselves. The weight of each Bullet Proof
panel or block along with the accessories varies between 20-25 kg except the nine
front face panels which weigh within 40-45 kg each. The Bullet Proof panels can be
ferried by all means of conveyance including animal transport, helicopters and manpack
in all kinds of terrain. The bunker on dismantling can be shifted to new location
with minimum losses restricted to nut bolts only. To ensure temperature control in
snow bound area and deserts, bunker is reinforced with PUF Insulation Panels.
I P Q DELHI 1 7 - ~ 1 - 2 0 i 41 7
5
In yet another embodiment, the design of the bunker enables quick erection and
dismantling in 6-8 hours by an untrained team of 6-8 soldiers while the construction
material is transportable by any mode of conveyance including man-pack to animal
transport to helicopters in all type of terrain and weather conditions. The bunker
doesn't require any maintenance but requires painting to be done every 4-5 years. The
Bullet Proof steel used for manufacturing the bunkers is as per DGQA Specification
for Bullet Proof Applications.
Depending on the specific requirement of the user's area of operations, two type of
specifications ( 13 inch and 18 inch) have been worked out varying the size of the
panels for better portability, easy handling and transportability described below in the
form of table. The size and strength of the bunker varies as per the requirement.
Table 1 (13 inch)
IPQ QELHI 17 - 1.1 - LB.P4.. 1 7 Z p . - - - - - A
Sr. No.
1
2
3
4
5
6
7
8
9
SPECIFICATION OF
DESCRIPTION
Size
WEIGHT
DlAMENSlON OF PANELS
FRONT PORTION
RIGHT SlDE WALL
LEFT SIDE WALL
INSIDE GALLARY WALL
BACK WALL
DOOR
FIRING SLOTS SlZE
ROOF
FLOOR
SQURE PIPE SlZE
ANGLESIZE
WEIGHT OF PANELS
BULLET PROOF RETRIEVABLE FIGHTING BUNKER
SPECIFICATIONS
Lengih 12 feet i 2 inch
Width 9 feet * 2 inch
Height 7 feet * 2 inch
BP PANELS INCLUDING COVERING STRIPS =I580 kgs i rolling tolerance
(Approx)
MILD STEEL =3140 kgs i rolling tolerance
(APP~OX)
EXTRA ACCESSORIES =50 kgs i rolling tolerance (Approx)
SIZE
935 *5 X 660 *5 X 6.5 i rolling tolerance
935 i 5 X 330 i 5 X 6.5 i rolling tolerance
457 i 5 X 330 i 5 X 6.5 i rolling tolerance
457 i 5 X 330 i 5 X 6.5 * rolling tolerance
457 i5 X 330 i 5 X 6.5 * rolling tolerance
457 *5 X 330 *5 X 6.5 * rolling tolerance
834 i 5 X 660 i 5 X 6.5 * rolling tolerance
QUANTITY
3 nos
12 nos
24 nos
24 nos
18 nos
30 nos
1 nos
Material
BP Steel
BP Steel
BP Steel
BP Steel
BP Steel
BP Steel
BP Steel
834 i 5 X 660 *5 X 6.5 * rolling tolerance
834 *5 X 660 *5 X 6.5 * rolling tolerance
620i5X425i5
1 nos
1 nos
3 nos
BP Steel
BP Steel
BP Steel
30 nos. panels of Mild SteellBP Steel and Fiber Sheet to cover the top portion.
30 nos. panels of mild steel Chqured Plate of thickness 5mm.
1) 80mm X 80mm X 4mm
1) 75mm X 75mm X 5mm
2) 25mm X 25mm X 4mm
Sizes
938 i 5 X 660 i 5 X 6.5 * rolling tolerance
938 i 5 X 330 *5 X 6.5 * rolling tolerance
Weight
32 kgs i roll~ngto lerance
(Approx)
16 kgs i rolling tolerance
(APProx)
457 t 5 X 330 *5 X 6.5 i rolling tolerance
834 *5 X 660 *5 X 6.5 * rolling tolerance
8 kgs * rolling tolerarice
(Approx)
29 kgs * rolling tolerance
(Approx)
Sr. No.
1
2
3
SPECIFICATION OF
DESCRIPTION
Size
WEIGHT
DlAMENSlON OF PANELS
FRONT PORTION
RIGHT SlDE WALL
LEFT SlDE WALL
INSIDE GALLARY WALL
BACK WALL
DOOR
10
11
12
13
14
15
16
17
Table 2 (18 inch)
7
LOCKING ARRANGEMENT
NUTS AND BOLTS
ASSEMBLING
PROTECTION LEVEL
MATERIAL
REPLACEMENT
PUF INSULATION PANELS 63mm
THICK
COLOUR
Each Panel of the Permanent Defence has easily locking arrangements for
assembling and dismant1ing.k can be assembled completely by nut and bolting.
BULLET PROOF RETRIEVABLE FlGHnNG BUNKER "YASK"
SPECIFICATIONS
Length 12 feet * 2 inch
Width 9 feet f 2 inch
Height 7 feet * 2 inch
BP PANELS INCLUDING COVERING STRIPS =I580 kgs * mlling tolerance
MILD STEEL =3140 kgs 2 rolling tolerance
Size
MI2 x 130mm
M12 x 30mm
Head less bolt (Mi 6 x 30mm)
Head less bolt (MI4 x l30mm)
EXTRA ACCESSORIES =50 kgs *
SIZE
935 *5 X 720 *5 X 6.5 i rolling tolerance
935 *5 X 630 *5 X 6.5 i rolling tolerance
457 fi X 720 fi X 6.5 i rolling tolerance
457 *5 X 630 *5 X 6.5 * rolling tolerance
457 *5 X 720 *5 X6.5 * rolling tolerance
457 *5 X 630 *5 X 6.5 i rolling tolerance
457 *5 X 720 *5 X 6.5 i rolling tolerance
457 *5 X 630 *5 X 6.5 i rolling tolerance
457 6 X 720 *5 X 6.5 * rolling tolerance
457 *5 X 630 *5 X 6.5 i rolling tolerance
670 *5 X 905 *5 X 6.5 2 rolling tolerance
630 *5 X 905 *5 X 6.5 * rolling tolerance
600 *5 X 905 *5 X 6.5 2 rolling tolerance
Ouantity
368 nos
104 nos
40 nos
51 nos
Permanent Defence can easily assembled or dismantled with in 10 Hours.
Each Panel should be able to provide following protection against Bill ammunition -
1) 7.62 x 51mm (SLR) from 10 meters.
2) 7.62 x 39mm (AK-47) from 10 meters.
3) 5.56~45 InsaslSS-109 from 10 meters
4) .303 Rifle from 10 meters
5) Splinters of Grenade No.36 HE from 10 meters.
Bullet Proof Steel used for manufacturing Permanent Defence must be as per
DGQA specifications for Bullet Proof Applications.
As and when Permanent Defence is fired upon and there is a damage to the port
shutterlpanels, both are replaceable from inside.
As per the requirement of customer.
As per user choice.
rolling
QUANTI
TY
3 nos
6 nos
4 nos
8 nos
4 nos
8 nos
3 nos
6 nos
5 nos
10 nos
1 nos
1 nos
1 nos
tolerance
Material
BP Steel
BP Steel
BPSteel
BP Steel
BP Steel
BP Steel
BP Steel
BP Steel
BP Steel
BP Steel
BP Steel
BP Steel
BP Steel ,
4 FIRING SLOTS SIZE 620*5X425*5 3 nos BP Steel
5
6
7
8
9
10
1
12
13
14
15
16
17
The product design being based on "Block System" and "Nut Bolt" technology and
damaged block during thick of the war Iconfi-ontation can be replaced by a soldier I
jawans without any major efforts. Security Forces operating in cold region can be
provided with insulated bunkers that can withstand the temperature ranging between -
40" to + 50" Celsius.
Certain features of the invention have been described with the reference to the
embodiments. However the description is not intended to be construed in a limiting
sense. Various modifications of the embodiments as well as other embodiments on the
invention, which are apparent to the persons skilled in the art to which the invention
pertains, are deemed to lie within the spirit and scope of the invention.
IPg=J BEJHI I7;--L:2QXP- LI--.".- ZU--- - -- - _ _ _ - - -
8
ROOF
FLOOR
SQURE PIPE SlZE
ANGLESEE
WEIGHT OF PANELS
LOCKING ARRANGEMENT
NUTSANDBOLTS
ASSEMBLING
PROTECTION LEVEL
MATERIAL
REPLACEMENT
PUF INSULATION PANELS 63mm
THICK
COLOUR
29 nos. panels of M~ldS teel1 BP Steel and Fiber Sheet to cover the top porhon
17 nos panels of m~ldst eel Chqured Plate of thickness 5mm
1) 80mm X 80mm X 4mm
1) 75mm X 75mm X 5mm
2) 25mm X 25mm X 4mm
S~zes
935 *5 X 720 *5 X 6 5 5 roll~ngto lerance
935 *5 X 630 *5 X 6.5 * roll~ngto lerance
457 *5 X 720 *5 X 6 5 * rolling tolerance
457 *5 X 630 *5 X 6 5 * roll~ngto lerance
We~ght
36 kgs * rolling
tolerance
31 kgs k roll~ng
tolerance
17 kgs * rolling
tolerance
15 kgs * rolling
tolerance
Each Panel of the Permanent Defence has eas~lylo ck~nga rrangements for
assemblrng and dlsmantling.lt can be assembled completely by nut and bolting
S~ze
MI2 x l30mm
MI2 x 30mm
Head less bolt (MI6 x 30mm)
Head less bolt (M12 x 130mm)
Ouantity
299 nos
104 nos
40 nos
51 nos
Permanent Defence can easlly assembled or d~smantledw th In 10 Hours
Each Panel should be able to prov~defo llowtng protect~ona ga~nsBt all ammunltlon -
1) 7.62 x 51mm (SLR) from 10 meters
2) 7.62 x 39mm (AK47) from 10 meters
3) 5 56x45 InsaslSS-109
4) 303 kfle
5) Splinters of Grenade No 36 HE from 10 meters.
Bullet Proof Steel used for manufactunng Permanent Defence must be as per
DGQA spectticahons for Bullet Proof Appllcahons
As and when Permanent Defence IS tired upon and there 1s a damage to the port
shutterlpanels, both are replaceable from ~ns~de.
As per the requ~remenot f customer
As per user cholce
WL Claim:
1. An improved portable bunker, comprising :
- an integrated structure with plurality of members;
- said structure having a first, second , third and a fourth wall to form a chamber ;
- at least one door made of plurality of metallic bullet proof panels ,
- said door coupled with said third wall of said chamber; and
- a bullet proof gallery.
2. An improved portable bunker as claimed in Claim 1 , wherein said first wall is the
front wall , said second wall is the back wall, said third wall is the right wall and said
fourth wall is the left wall.
3. An improved portable bunker as claimed in Claim 1 , wherein there are preferably
three firing slots in said bunker .
4. An improved portable bunker as claimed in Claim 1, wherein said bullet proof
panels are transportable to any location by any means of available transport.
5. An improved portable bunker as claimed in Claim 1, wherein said bunker can be
conveniently assembled 1 dismantled in 6-8 hours..
6. An improved portable bunker as claimed in Claim 1, wherein said bullet proof steel
is adaptable for any bullet proof applications.
7. An improved portable bunker as claimed in Claims 1 and 4 , wherein said bullet
proof panels varies between 20- 25 kgs.
8. An improved portable bunker as claimed in Claim 1, wherein said bunker gallery
increases the size of said bunker and assists the occupants to come out during a natural
calamity.
9. An improved portable bunker as claimed in Claim 1, wherein a metallic roof is
associated to said chamber and said gallery to provide protection from natural and
environmental vagaries.
= -J-PQ- ~ E C H I - 17-= T-P-- LU-~.&. PY---Z.eL - .- ---- - " - - - - - -
9
10. An improved portable bunker as claimed in Claim 1 , wherein said chamber
preferably measures 9- 13 feet in length, 8- 10 feet in breadth and 6-8 feet in height.
11. An improved portable bunker as claimed in any of the proceeding claims
substantially as herein described with reference to accompanying drawings.