Ceiling-Mounted Blast Attenuation Seat to Reduce Mine Blast Injuries
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Solution Overview
Problem
Current vehicle seat systems fail to effectively mitigate injuries and fatalities from mine blasts due to inadequate energy absorption and complex blast dynamics, often leading to system destruction or ineffectiveness in deflecting blast forces.
Innovation Solution
A blast attenuation seat system featuring a shock absorber mounted to the vehicle's roof or wall, a seat suspended from the shock absorber, and a multi-dimensional linkage between the seat and vehicle, including a crushable element and a shear pin system to isolate occupants from chassis shocks and absorb energy during blasts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If more armour plating is added to deflect the blast, then blast protection is improved, but vehicle weight increases and capabilities are limited
Solution Approach 1:
The invention extracts the blast protection function from the vehicle's structural armour and relocates it to the seating system. The seat assembly becomes an independent protective unit with its own energy absorption mechanisms (springs, shock absorbers, crushable elements) that operates separately from the vehicle chassis, eliminating the need for additional armour plating on the vehicle body.
Solution Approach 2:
The invention changes the protective approach from rigid armour plating to compliant energy-absorbing structures. The seat assembly uses springs, shock absorbers, and crushable elements that deform under blast loads to absorb energy, transforming the protection mechanism from force resistance to energy dissipation through controlled deformation.
2Device complexity
If simplistic energy-absorbing systems are used, then device complexity is reduced, but effectiveness in reducing injury and death is insufficient
Solution Approach 1:
The seat assembly is segmented into multiple independent energy absorption components: upper springs, lower springs, shock absorbers, and crushable elements. Each component handles specific aspects of blast energy dissipation, and the segmentation allows the system to absorb vast amounts of energy through cumulative deformation of multiple elements rather than relying on a single complex mechanism.
Solution Approach 2:
The invention employs dynamic energy absorption mechanisms that adapt to blast forces. The springs compress, shock absorbers extend, and crushable elements deform in response to impact loads, creating a dynamic system that absorbs energy through controlled motion and deformation rather than rigid resistance, significantly improving injury mitigation effectiveness.
3Ease of manufacture
If strap suspension systems are used to suspend vehicle seats, then ease of manufacture is improved, but the systems launch the passenger into the roof or allow collision with vehicle sides during explosion
Solution Approach 1:
The invention introduces restraint straps as intermediary elements between the seat and passenger. These straps actively restrain the passenger's body and appendages during blast events, preventing flailing and collision with the vehicle interior. The straps work in conjunction with the energy-absorbing seat structure to provide both suspension and active restraint, solving the harmful effects of simple suspension systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system significantly reduces vertical and horizontal shock-induced injuries by decoupling occupants from the vehicle chassis, minimizing flailing and internal collisions, and effectively attenuating lateral forces, thereby enhancing occupant safety during mine blasts and roadside explosions.
Implementation Method 1
a shock absorber mounted to the vehicle's roof or wall
Implementation Method 2
a crushable element and a shear pin system to isolate occupants from chassis shocks and absorb energy during blasts
Data Source
Figure 1~2
Figure 3
Figure 4~4A
AI summary
This invention relates to a system and method of armed forces vehicle seating which reduces the potential for injury to occupants when the vehicle is subjected to a mine or similar explosive device. The seats are ceiling or wall mounted and include a trailing arm which allows for deflection while providing stability. The seat isolates the occupants from the chassis of the vehicle via a pneumatic or other shock absorber and/or a crushable element to provide protection from vertical and horizontal oriented blasts. These seats can also be combined with shock absorbing/isolating foot rests, appendage (leg) restrain systems and an occupant four-point harness to offer a completely integrated system. This integrated system reduces acceleration/deceleration related injuries, shock injuries to the lower legs, flailing injuries to the lower legs and internal collision injuries. Other options and alternatives are also described.