Telescoping Fluid Damping Head Restraint for Rotational Injury
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Solution Overview
Problem
Current technologies fail to effectively prevent brain and cervical spine injuries caused by rapid acceleration and deceleration, particularly rotational movements, which can lead to shearing damage and tissue tearing, due to the inability of existing devices to adequately manage head movement during impacts such as car crashes or blasts.
Innovation Solution
A device comprising a headpiece and a support harness with a telescoping member that uses fluid extension and compression to absorb and dampen rotational movements, featuring ball and socket joints for multi-directional movement and an acceleration threshold detector to trigger fluid flow, thereby limiting excessive head and neck motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid head restraint system is used to prevent head movement during impact, then protection against brain and cervical spine injury is improved, but normal head movement and flexibility are restricted
Solution Approach 1:
The telescoping member transitions from a static rigid structure to a dynamic system with multiple telescoping sections that can extend and compress in response to impact forces. This allows the device to adapt its stiffness characteristics, remaining flexible during normal use and becoming rigid only when needed for protection.
Solution Approach 2:
The device changes its mechanical parameters (length, stiffness) in response to impact conditions. During normal head movement, the telescoping sections remain extended allowing full range of motion. During impact, the sections compress to reduce the distance head travel and increase structural stiffness for protection.
2Reliability
If a telescoping member with multiple nested tubes is used to absorb impact energy, then protection against rotational acceleration is improved, but device complexity increases
Solution Approach 1:
The device employs multiple telescoping tubes nested within each other, with each tube having progressively smaller diameter. This nested structure allows compact storage while providing multiple stages of energy absorption during impact, as each tube can compress independently to dissipate kinetic energy.
Solution Approach 2:
The telescoping member incorporates a piston and fluid chamber system where fluid must move through restricted openings during compression. This hydraulic mechanism provides controlled resistance to telescoping, converting kinetic energy into fluid friction heat and providing progressive damping without complex mechanical springs or shock absorbers.
3Adaptability or versatility
If ball and socket joints are used to permit multi-directional movement, then adaptability to head motion is improved, but precision in measuring relative motion deteriorates
Solution Approach 1:
The device introduces intermediate telescoping sections between the headpiece and torso anchor points. These intermediate sections act as mediators that can absorb and isolate movements, allowing the ball and socket joints to accommodate multi-directional motion while the central telescoping member maintains a more stable reference frame for measurement purposes.
Solution Approach 2:
The device divides the restraint system into multiple independent segments (headpiece, multiple telescoping sections, torso harness) connected by joints. This segmentation allows each component to move independently in its optimal range while maintaining overall system integrity, with sensors positioned to measure relative motion between specific segments rather than requiring perfect rigidity throughout.
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 device effectively reduces the risk of brain and cervical spine injuries by absorbing and dampening rotational accelerations, preventing tissue strain and damage during impacts, while allowing normal head movement, thus addressing the limitations of existing technologies.
Implementation Method 1
a telescoping member having a main tube and a series of progressively smaller diameter tubes nested within each other, wherein the smaller diameter tubes are adapted to extend and compress in a linear plane by the intake and outflow of fluid
Implementation Method 2
wherein the smaller diameter tubes are adapted to extend and compress in a linear plane by the intake and outflow of fluid
Implementation Method 3
a telescoping member having expansion bellows adapted to extend and compress in a linear plane by the intake and outflow of fluid
Implementation Method 4
the first engaging member and the first attachment member form a ball and socket joint adapted to allow three degrees of freedom, permitting rotary movement in all directions through the movement of the first engaging member in the first attachment member
Data Source
AI summary
The relational motion detection system measures relative motion of a head of a subject relative to a torso of a subject. The system includes a first motion detection sensor on a first apparatus configured to be secured to a head of a subject to detect a first motion. It also includes a second motion detection sensor on a second apparatus configured to be secured to the torso of a subject to detect a second motion. The system further includes a control unit configured to obtain information regarding the first motion from the first motion detection sensor and second motion from the second motion detection sensor, wherein the control unit contains instructions for calculating motion of the head relative to the torso of the subject based on the obtained first motion and second motion.