Title of Invention

"DEVICE FOR MITIGATING SHOCK WAVES AND INDUCED FORCES DURING EXPLOSION"

Abstract A device for mitigating shock waves and induced forces during explosion made of plurality of cells (C 3) comprising complete airtight enclosure (C 2) and partially compressible porous element (C 1) having a gas and an incompressible fluid within its pores. Said cells (C 3) are joined together forming a matrix which is fixed on a base (C 4) and covered by a cover (C 5) to form a protective device (C 6). Said protective device (C 6) can be attached to a vehicle or a building or any other object to protect the same from a land mine blast. FIG. 4
Full Text Field of the invention
The invention relates to reducing the lethality of explosive blasts and or scattering the energy of impact.
Background
The extremists and terrorist use explosives to target the men and materials of the Army and paramilitary forces. Often explosive is hidden and blasted just as the target vehicle is passing by. Typically, an improvised explosive device (LED) has little or no metal in it so as to avoid detection by known conventional means employed by the armed forces.
The lethal injury due to IED explosion is through the crushing effect of the shock wave and acceleration generated by the force of the explosion.
The shock wave and the acceleration generated by explosive blast are of a high order and occur in a very short time. When the human body experiences such shock wave and acceleration the organs of the body experience crushing force and are torn out of their functional position resulting in death.
If the shock wave and acceleration generated by the force of the explosion were to compress and accelerate some other material before it compresses the organs of the human body, the lethal effect of the blast force would be diminished and so the deaths associated with explosive blasts would be greatly reduced.
State of art
Explosive blast force mitigation has been attempted by the use of sand bags. Sand bags have the inherit disadvantage of being very heavy, whatever protection sand bags offer is offset by the reduced mobility and agility, which as res important in a combat situation.


Attempts to mitigate explosive blast force with intervening material have had limited success, with adverse cost to benefit rations with unacceptable weight and volume additions.
The few vehicles that have some degree of protection against IED blast are those that are armor plated which do not pertain to the field of the invention.
Some special purpose units of the armed forces like bomb disposal squads use blast force mitigation devices however these blast mitigation devices are much too expensive to be used for all vehicles that experience the threat of the IED blast.
The result is that the vehicles of the paramilitary and armed forces are without any IED protection making these vehicles and men inside them suitable targets for the extremists and terrorists.
Objectives of the invention
One the objects of the invention is to provide protection to the men and material inside a vehicle from the damage due to explosive blast.
Another object of the invention is to provide protection to men and material from damage due to blast force using economical and readily assembled protection device.
Another object of the invention is to provide protection to buildings and structures, which may be at risk from the explosive blasts.
Another object of the invention is to provide for a device that actively dissipates the energy of shock wave generated in an explosion or impact.
Summary of the invention
Accordingly the invention provides a device for mitigating shock waves and induced force during explosion, said device comprising:
- a complete airtight cell containing partially compressible porous element having a gas and an incompressible fluid within its pores,
- forming the matrix of said complete cells,
- fixing the said matrix on a base,
- covering the said matrix with a covering and
- said base is provided with a means to secure the device to the object to be protected.
The partially compressible porous element is in the form of multi layer, each layer being interspaced by impervious material.
The said object to be protected is a sentry box, building, vehicle or a bomb whose blast is to be contained.
The said matrix is a multi-layered matrix.
The said device as herein described with the accompanying drawings.
Brief Description of the Drawings:
The invention will now be described with reference to the accompanying drawings
Fig. I. shows partially compressible porous element containing a gas and an incompressible fluid in its pores.
Fig. 2. shows an airtight enclosure capable of holding the partially compressible porous element.
Fig. 3. shows the airtight enclosure containing the partially compressible porous element carrying gas and an incompressible fluid within its pores , to form the complete cell.
Fig. 4|. shows the matrix of complete cells joined together and secured on a base provided with a cover to form the protective device and the said base having means to secure the matrix to the side of the object to be protected.
Fig. 5[ shows the sentry box or building with the protective device secured to one or all sides to protect the object.
Fig. 6. shows a motor vehicle whose underside is provided with the protective device to protect the vehicle from land mine blast.

f%. 7. shows a suspect explosive device (IED), which is surrounded by the protective device so as to contain the damage of its blast to other structures and personnel around it.
Detailed Description
Referring to the drawings, in Fig. 1 a partially compressible porous element (Cl) containing a gas and an incompressible fluid in its pores, is shown. An airtight enclosure (C2) capable of holding the partially compressible porous element (Cl), is shown in figure 2. The airtight enclosure (C2) containing the partially compressible porous element (Cl) carrying gas and an incompressible fluid within its pores, forming the complete cell (C 3) is shown in figure 3. Further, the matrix of complete cells (C 3) joined together an4 secured on a base (C 4) provided with a cover (C 5) to form the protective device (C 6), shown in figure 4. The said base (C4) having means (C7) to secure the matrix to the side of the object to be protected. The sentry box (SB) oil building or any other object with the protective device (C 6) secured to one or all sides, is shown in figure 5. Figure 6 illustrates a motor vehicle (MV) whose underside is provided with the device (C 6) to protect the vehicle from land mine blast. A suspect explosive device (IED) which is surrounded by the protective device (C 6) so as to contain the damage of its blast to other structures and personnel around it (figure 7).
Working of the invention
The lethal components of an explosive detonation are the high intensity Shockwave and the explosive acceleration, which are produced due to the large amount of energy that is released in a short span of time.
In the event of an explosive blast close to the object to be protected, the shock wave from the blast would interact with the invention in the following manner.
- The shock wave from the blast on arrival at the matrix (C 6) would, in each complete cell (C 3), encounter an arrangement of partially compressible porous material, incompressible fluid and gas element (Cl).

The speed of the Shockwave in each of the above three medium is different and so the shock wave breaks up greatly reducing its lethal effect.
The shock wave on reaching the matrix (C 6), would encounter in each complete cell (C3) a large number of the following interfaces
interfaces between incompressible fluid and gas
interface between partially compressible porous material
and gas
interface between partially compressible porous material
and incompressible fluid.
At each interface the shock wave is reflected and or refracted changing both its direction and speed and reducing its damage causing ability.
The compressive force of the explosion would on arrival at the protective device (C 6), compress the partially compressible material in each complete cell (C 3) and would accelerate the incompressible fluid trapped within its pores and scatter the incompressible fluid. This would further dissipate the force of the explosion.









WE CLAIM:
1. A device for mitigating shock waves and induced forces during
explosion, said device comprising:
- a complete airtight cell (C 2 ) containing partially compressible porous element (C 1) having a gas and an incompressible fluid within its pores,
- forming the matrix of said complete cells (C 3),
- fixing the said matrix on the base (C 4),
- covering said matrix with a covering (C 5) and
- said base (C 4) is provided with a means (C 7) to secure the device to the object protected.

2. A device for mitigating shock waves and induced forces during explosion as claimed in claim 1 wherein the partially compressible porous element (C 1) is in the form of multi layer, each layer being interspaced by impervious material.
3. A device for mitigating shock waves and induced forces during explosion as claimed in claim 1 wherein the said object to be protected is a sentry box, building, vehicle or a bomb whose blast is to be contained.
4. A device for mitigating shock waves and induced forces during explosion as claimed in claim 1 wherein the said matrix is a multi-layered matrix.
5. A device for mitigating shock waves and induced forces during explosion substantially as herein described with reference to and as illustrated in the accompanying drawings.

Documents:

655-DEL-2004-Abstract-(16-09-2009).pdf

655-DEL-2004-Claims-(16-09-2009).pdf

655-del-2004-claims.pdf

655-DEL-2004-Correspondence-Others-(16-09-2009).pdf

655-del-2004-correspondence.pdf

655-DEL-2004-Description (Complete)-(16-09-2009).pdf

655-del-2004-description (provisional).pdf

655-del-2004-description.pdf

655-DEL-2004-Drawings-(16-09-2009).pdf

655-del-2004-drawings.pdf

655-DEL-2004-Form-1-(16-09-2009).pdf

655-DEL-2004-Form-2-(16-09-2009).pdf

655-del-2004-form1.pdf

655-del-2004-form2 (provisional).pdf

655-del-2004-form2.pdf

655-del-2004-form26.pdf

655-del-2004-form3.pdf

655-del-2004-form5.pdf


Patent Number 246348
Indian Patent Application Number 655/DEL/2004
PG Journal Number 09/2011
Publication Date 04-Mar-2011
Grant Date 24-Feb-2011
Date of Filing 31-Mar-2004
Name of Patentee ADESS SINGH
Applicant Address 1179 PHASE 5, MOHALI-160055 (NEAR CHANDIGARH), INDIA.
Inventors:
# Inventor's Name Inventor's Address
1 ADESS SINGH 1179 PHASE 5, MOHALI-160055 (NEAR CHANDIGARH), INDIA.
PCT International Classification Number F42D 5/00
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA