WO2019170179A1 - Helmet damping system - Google Patents

Helmet damping system Download PDF

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Publication number
WO2019170179A1
WO2019170179A1 PCT/CZ2019/050009 CZ2019050009W WO2019170179A1 WO 2019170179 A1 WO2019170179 A1 WO 2019170179A1 CZ 2019050009 W CZ2019050009 W CZ 2019050009W WO 2019170179 A1 WO2019170179 A1 WO 2019170179A1
Authority
WO
WIPO (PCT)
Prior art keywords
helmet
frames
shaped
head
air
Prior art date
Application number
PCT/CZ2019/050009
Other languages
French (fr)
Inventor
Alojz Hanuliak
Martin Havlik
Roman Matl
Original Assignee
Alojz Hanuliak
Martin Havlik
Roman Matl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alojz Hanuliak, Martin Havlik, Roman Matl filed Critical Alojz Hanuliak
Publication of WO2019170179A1 publication Critical patent/WO2019170179A1/en

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Classifications

    • AHUMAN NECESSITIES
    • A42HEADWEAR
    • A42BHATS; HEAD COVERINGS
    • A42B3/00Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04Parts, details or accessories of helmets
    • A42B3/10Linings
    • A42B3/12Cushioning devices
    • A42B3/125Cushioning devices with a padded structure, e.g. foam
    • A42B3/127Cushioning devices with a padded structure, e.g. foam with removable or adjustable pads
    • AHUMAN NECESSITIES
    • A42HEADWEAR
    • A42BHATS; HEAD COVERINGS
    • A42B3/00Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04Parts, details or accessories of helmets
    • A42B3/06Impact-absorbing shells, e.g. of crash helmets
    • AHUMAN NECESSITIES
    • A42HEADWEAR
    • A42BHATS; HEAD COVERINGS
    • A42B3/00Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04Parts, details or accessories of helmets
    • A42B3/06Impact-absorbing shells, e.g. of crash helmets
    • A42B3/062Impact-absorbing shells, e.g. of crash helmets with reinforcing means
    • A42B3/063Impact-absorbing shells, e.g. of crash helmets with reinforcing means using layered structures
    • AHUMAN NECESSITIES
    • A42HEADWEAR
    • A42BHATS; HEAD COVERINGS
    • A42B3/00Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04Parts, details or accessories of helmets
    • A42B3/06Impact-absorbing shells, e.g. of crash helmets
    • A42B3/069Impact-absorbing shells, e.g. of crash helmets with soft external layer, e.g. for use in impact sports
    • AHUMAN NECESSITIES
    • A42HEADWEAR
    • A42BHATS; HEAD COVERINGS
    • A42B3/00Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04Parts, details or accessories of helmets
    • A42B3/10Linings
    • AHUMAN NECESSITIES
    • A42HEADWEAR
    • A42BHATS; HEAD COVERINGS
    • A42B3/00Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04Parts, details or accessories of helmets
    • A42B3/10Linings
    • A42B3/12Cushioning devices
    • A42B3/121Cushioning devices with at least one layer or pad containing a fluid

Definitions

  • the invention relates to damping systems for the deceleration of rotational head movement in helmets and headgear with a solid, but breakable, outer shell, used in sports, including recreational sports.
  • safety equipment mostly consists of a solid, outer shell, often made of plastic or composite materials, and from energy absorbing layers called inserts. In most cases, a softer plastic or other similar lining forms this insert.
  • safety helmets must be designed in a way, which fulfils the prescribed, legal requirements, which include, among other things, the maximum acceleration that can occur at the centre of gravity of the brain at the specified load.
  • tests are performed, in which the mock cranium, equipped with a helmet, is submitted to a radial strike to the head.
  • Modern helmets have acceptable capabilities to absorb energy in the case of a radial strike to the skull. Although, the absorption of energy in other directions of the strike are usually less than optimal.
  • the most common type of impact is a slanted impact, which is a combination of radial and tangential forces, both partly affecting the head, which causes concussions, for example.
  • the rotational acceleration of the cranium causes injury to the body elements, which connect the brain to the cranium and also injury to the brain itself.
  • rotational injuries on one hand is subdural hematoma, SDH, a haemorrhage resulting from a tom blood vessel, and on the other, diffuse axonal injury, DAI, which can be summarized as the elongation of the neural fibres resulting from the brain tissue pattern having been highly deformed.
  • SDH subdural hematoma
  • DAI diffuse axonal injury
  • the head does have natural protective systems, which strive to dampen any deforming forces with the hardness of the cranium and the cerebrospinal fluid beneath it.
  • the cerebrospinal fluid acts as a rotational, impact damper.
  • helmets provide adequate protection against direct and perpendicular impacts, but provide lesser protection against stronger impacts, angled askew to the head and leading to the rotational injury of the head, especially the brain.
  • Anisotropic material can be of a foam or honeycomb material.
  • the foam is preferably a closed cell foam.
  • This helmet allows the partial interruption of the tangential effects on the helmet, causing lower rotational acceleration or the deceleration of the wearer's head, when compared to the use of an isotropic foam helmet, while also allowing a substantial amount of rotational energy to be absorbed.
  • the file, DE 19 504 022 also discloses a protective helmet, where the energy absorbing space is created as a hallow body, blown into the air cushion where the elongated air chambers are formed in the foam layer which are connected by small, air hoses.
  • the protective helmet contains an outer shell, which has been manufactured from a hard material.
  • the impact on the head is received by means of the inner part, which is arranged in the inner side of the outer shell.
  • the inner part is divided into an insert and a double-sided pad, which uses a rigid or sliding attached plastic strip provided with a bristle material or bristles to the outer skeleton.
  • Said inner moulded foam insert, skeleton, with an attached plastic strip with a bristle material or bristles are preferably placed in the textile wrap and/or between the textile interlays placed between the rigid outer skeleton and the bristle material or bristles to guarantee minimal adhesion with the outer skeleton.
  • the object of the present invention is a helmet dampening system capable of significantly eliminating impacts leading to the rotation of the head during a perpendicular or slanted impact and which is capable of effectively dampening any unsafe movement of the head and brain.
  • the helmet damping system containing air cushions, placed in frames made of a soft foam mass on the inner side of the helmet’s shell, significantly eliminates head rotation and thus, any unsafe movement of the brain during a perpendicular or slanted impact and these impacts are effectively dampened.
  • the dampening effect is attained by the properties of these air cushions which, when pressurized to air pressure values in the range of 0.4 to 2.6 bar upon impact, are partially shifted in the frames to thereby dampen the effects of the impact.
  • Fig. 1 represents the air cushion's layout, placed in a closed frame, with the point of perspective coming from inside the helmet
  • Fig. 2 represents the air cushion's layout, placed in an opened frame, with the point of perspective coming from inside the helmet
  • Fig. 3 represents the cross-section, single cushion
  • Fig. 4 represents the cross-section, double cushion
  • Fig. 5 represents the slanted direction of impact to the double cushion
  • Fig. 6 represents the ground plan view of the closed frame made from a soft foam material with an inserted, air cushion without a lid
  • fig. 7 represents the cross- section of this frame
  • Fig. 1 represents the air cushion's layout, placed in a closed frame, with the point of perspective coming from inside the helmet
  • Fig. 2 represents the air cushion's layout, placed in an opened frame, with the point of perspective coming from inside the helmet
  • Fig. 3 represents the cross-section, single cushion
  • Fig. 4 represents the cross-section, double cushion
  • Fig. 5 represents the slanted
  • Fig. 8 represents the ground plan view of the opened frame made from a soft foam material with an inserted, air cushion without a lid
  • Fig. 9 represents the ground plan view of the frame made from a soft foam material with a textile covered lid
  • Fig. 10 represents the cross-section of this frame
  • Fig. 11 represents the ground plan view of the frame made from a soft foam material with internal space for an air cushion insert with a lid and without a textile cover
  • Fig. 12 represents the cross-section of this frame without a textile cover.
  • Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 1, Fig. 3 and Fig. 8 consisting of shaped single-chamber, mutually separated airtight cushions l_, manufactured from a plastic foil PE/PE, with a thickness of 42pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material.
  • the laterally opened frames 2 are solidly connected to the inner side of the helmet’s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions 1, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called Velcro fasteners.
  • Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 1, Fig. 4, Fig. 5 and Fig. 8 consisting of shaped single-chamber, mutually separated airtight cushions l_, manufactured from a plastic foil PE/PE, with a thickness of 42pm, arranged in two layers, one on top of the other, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material.
  • the frames 2 are solidly connected to the inner side of the helmet’s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions 1, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called Velcro fasteners.
  • Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 2, Fig. 3, Fig. 6 and Fig. 7 consisting of shaped single-chamber, mutually separated airtight cushions l_, manufactured from a plastic foil PE/PE, with a thickness of 52pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally closed frames 2 made from a soft foam material.
  • the laterally closed frames 2 are solidly connected to the inner side of the helmet’s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions l_, filled with air and placed within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called Velcro fasteners.
  • the values of the inner air pressure in the shaped airtight cushions 1 allow for compression during both a linear and a slanted impact.
  • Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 2, Fig. 4, Fig. 5 and Fig. 6 consisting of shaped single-chamber, mutually separated airtight cushions 1, manufactured from a plastic foil PE/PE, with a thickness of 52pm, arranged in two layers, one on top of the other, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally closed frames 2 made from a soft foam material.
  • the laterally closed frames 2 are solidly connected to the inner side of the helmet’s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions 1, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called Velcro fasteners.
  • the laterally closed frames 2, meant for the arrangement of the shaped, airtight cushions l_ filled with air support the larger stability of the damping system, during which time the flow of air coming through the internal parts of the helmet is minimally limited.
  • the values of the inner air pressure in the shaped airtight cushions 1 allow for compression during both a linear and a slanted impact.
  • Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 1, Fig. 3 and Fig. 8 to Fig. 10 consisting of shaped single-chambers, mutually separated airtight cushions J_, manufactured from a plastic foil PE/PE, with a thickness of 42pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material.
  • the frames 2, on their inner side facing the user's head are equipped with a detachable lid 3 made from a soft foam material, which is facing the user's head on its outer side, equipped with a textile cover 4 or upholstery forming the inner lining of the helmet.
  • the lateral frames 2 are solidly connected to the inner side of the helmet’s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions 1, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called Velcro fasteners.
  • the laterally opened frames 2 meant for the arrangement of the shaped, airtight cushions 1 filled with air, support the flow of air coming through the internal parts of the helmet, during which time the values of the inner air pressure in the shaped, airtight cushions l_ allow for compression during both a linear and a slanted impact.
  • Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 1, Fig. 4, Fig. 5 and Fig. 8 to Fig. 10 consisting of shaped single-chamber, mutually separated airtight cushions 1, manufactured from a plastic foil PE/PE, with a thickness of 42pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material.
  • the frames 2 on their inner side facing the user's head which, are equipped with a detachable lid 3 made from a soft foam material, which is facing the user's head on its outer side, equipped with a textile cover 4 or upholstery forming the inner lining of the helmet.
  • the laterally opened frames 2 are solidly connected to the inner side of the helmet’ s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions l_, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called Velcro fasteners.
  • the laterally opened frames 2 meant for the arrangement of the shaped, airtight cushions l_ filled with air, support the flow of air coming through the inner parts of the helmet, during which time the values of the inner air pressure in the shaped, airtight cushions 1 allow for compression during both a linear and a slanted impact.
  • Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 2, Fig. 3, Fig. 9 and Fig. 10 consisting of shaped single-chambers, mutually separated airtight cushions 1, manufactured from a plastic foil PE/PE, with a thickness of 52pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material.
  • the frames 2 on their inner side facing the user's head which, are equipped with a detachable lid 3 made from a soft foam material, which is facing the user's head on its outer side, equipped with a textile cover 4 or upholstery forming the inner lining of the helmet.
  • the laterally closed frames 2 are solidly connected to the inner side of the helmet’s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions 1, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called, Velcro fasteners.
  • the laterally closed frames 2 meant for the arrangement of the shaped, airtight cushions 1 filled with air, support the larger stability of the damping system, during which time the flow of air coming through the internal parts of the helmet is minimally limited.
  • the values of the inner air pressure in the shaped airtight cushions l_ allow for compression during both a linear and a slanted impact.
  • Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 2, Fig. 4, Fig. 5, Fig. 9 and Fig. 10 consisting of shaped single-chamber, mutually separated airtight cushions 1, manufactured from a plastic foil PE/PE, with a thickness of 42pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material.
  • the frames 2 on their inner side facing the user's head which, are equipped with a detachable lid 3 made from a soft foam material, which is facing the user's head on its outer side, equipped with a textile cover 4 or upholstery forming the inner lining of the helmet.
  • the laterally closed frames 2 are solidly connected to the inner side of the helmet’s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions l_, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called Velcro fasteners.
  • the laterally closed frames 2 meant for the arrangement of the shaped, airtight cushions l_ filled with air, support the larger stability of the damping system, during which time the flow of air coming through the internal parts of the helmet is minimally limited.
  • the values of the inner air pressure in the shaped airtight cushions 1 allow for compression during both a linear and a slanted impact.
  • 11 to 12 are consisting of shaped single-chamber, mutually separated airtight cushions 1, manufactured from a plastic foil PE/PE, with a thickness of 52pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material.
  • the laterally opened frames 2 are solidly connected to the inner side of the helmet’ s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions 1, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called Velcro fasteners.
  • Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 1, Fig. 4, Fig. 8 and Fig. 11 to 12 are consisting of shaped single-chamber, mutually separated airtight cushions l_, manufactured from a plastic foil PE/PE, with a thickness of 42pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material.
  • the frames 2, on their inner side facing the user's head which, are equipped with a detachable lid 3 made from a soft foam material, forming the inner lining of the helmet.
  • the laterally opened frames 2 are solidly connected to the inner side of the helmet’ s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions 1, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side, with the so-called Velcro fasteners.
  • Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 2, Fig. 3, Fig. 6 and Fig. 11 to 12 are consisting of shaped single-chamber, mutually separated airtight cushions l_, manufactured from a plastic foil PE/PE, with a thickness of 52pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material.
  • the frames 2, on their inner side facing the user's head which, are equipped with a detachable lid 3 made from a soft foam material, forming the inner lining of the helmet.
  • the laterally closed frames 2 are solidly connected to the inner side of the helmet’ s shell 5at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions l_, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side, with the so-called Velcro fasteners.
  • the values of the inner air pressure in the shaped airtight cushions 1 allow for compression during both a linear and a slanted impact.
  • Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 2, Fig. 4, Fig. 6 and Fig. 11 to 12 are consisting of shaped single-chamber, mutually separated airtight cushions 1, manufactured from a plastic foil PE/PE, with a thickness of 52pm, arranged in two layers, one on top of the other, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally closed frames 2 made from a soft foam material.
  • the frames 2, on their inner side facing the user's head which, are equipped with a detachable lid 3 made from a soft foam material, forming the inner lining of the helmet.
  • the laterally closed frames 2 are solidly connected to the inner side of the helmet’s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions 1, filled with air and placed within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side, with the so-called Velcro fasteners.
  • the values of the inner air pressure in the shaped airtight cushions 1 allow for compression during both a linear and a slanted impact.
  • the damping system connected to the inner side of the helmet's shell is usable for both sports helmets and work protection helmets, although especially usable for helmets present in cycling and similar sports.

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  • Helmets And Other Head Coverings (AREA)

Abstract

A damping system connected to the inner side of the helmet's shell (5) consisting of shaped single-chamber or multi-chamber, mutually separated airtight cushions (1) filled with air to the value of the inner pressure allowing for compression during an impact, arranged individually in frames (2) or housings made from a soft foam material, when these frames (2) are solidly connected to the inner side of the helmet's shell (5), the frames (2) or casings, meant for the arrangement of the shaped airtight cushions (1) filled with air, are laterally closed or opened to the airflow coming through the inner parts of the helmet.

Description

Helmet damping system
Field of the Invention
The invention relates to damping systems for the deceleration of rotational head movement in helmets and headgear with a solid, but breakable, outer shell, used in sports, including recreational sports.
Background of the Invention
The avoidance or reduction of the possibility of injury to the cranium and brain present during most sport and work activities require the use of a helmet. This safety equipment mostly consists of a solid, outer shell, often made of plastic or composite materials, and from energy absorbing layers called inserts. In most cases, a softer plastic or other similar lining forms this insert. Currently, safety helmets must be designed in a way, which fulfils the prescribed, legal requirements, which include, among other things, the maximum acceleration that can occur at the centre of gravity of the brain at the specified load. Typically, tests are performed, in which the mock cranium, equipped with a helmet, is submitted to a radial strike to the head. Modern helmets have acceptable capabilities to absorb energy in the case of a radial strike to the skull. Although, the absorption of energy in other directions of the strike are usually less than optimal.
In the case of a radial impact, the movement of the head is accelerated in translational motion, which leads to the linear acceleration of the head. Translational acceleration can result in a fractured cranium and/or pressure to the brain tissue or the actual injuring of the brain tissue. Nevertheless, according to injury statistics, clean radial impacts are rare. On the other hand, a clean tangential impact, which results in the angular acceleration of the head, is also rare.
The most common type of impact is a slanted impact, which is a combination of radial and tangential forces, both partly affecting the head, which causes concussions, for example. The rotational acceleration of the cranium causes injury to the body elements, which connect the brain to the cranium and also injury to the brain itself.
An example of rotational injuries on one hand is subdural hematoma, SDH, a haemorrhage resulting from a tom blood vessel, and on the other, diffuse axonal injury, DAI, which can be summarized as the elongation of the neural fibres resulting from the brain tissue pattern having been highly deformed. Depending on the rotational force properties, such as amplitude length and growth rate, either SDH or DAI or a combination of both occurs. Generally, SDH occurs in cases of short durations and with a large amplitude, whereas DAI occurs in cases of longer and wider load accelerations.
Although, the head does have natural protective systems, which strive to dampen any deforming forces with the hardness of the cranium and the cerebrospinal fluid beneath it. When the cranium is impacted, the cerebrospinal fluid acts as a rotational, impact damper.
Most currently used helmets provide adequate protection against direct and perpendicular impacts, but provide lesser protection against stronger impacts, angled askew to the head and leading to the rotational injury of the head, especially the brain.
One solution, which partially protects the head against rotational injury, is the solution according to pat. US 8578520, in which a helmet is described, having a hard shell containing energy absorbing layers and sliding elements. These sliding elements are also connected to the inner side of the energy absorbing layers, and so during a slanted impact, only these sliding elements move, not the entire inner, energy absorbing layer. Another known solution for a protective helmet is the solution made by pat. W02006005143, where a protective helmet is described having an outer layer and an inner layer for the contact of the user’s head, further containing a middle layer, made from an anisotropic, cellular material, which has a relatively low resistance to deformation resulting from tangential forces to the helmet. Anisotropic material can be of a foam or honeycomb material. The foam is preferably a closed cell foam. This helmet allows the partial interruption of the tangential effects on the helmet, causing lower rotational acceleration or the deceleration of the wearer's head, when compared to the use of an isotropic foam helmet, while also allowing a substantial amount of rotational energy to be absorbed.
The file, DE 19 504 022, also discloses a protective helmet, where the energy absorbing space is created as a hallow body, blown into the air cushion where the elongated air chambers are formed in the foam layer which are connected by small, air hoses.
Another well-known example is the solution present in pat. EP2428129, where the protective helmet contains an outer shell, which has been manufactured from a hard material. The impact on the head is received by means of the inner part, which is arranged in the inner side of the outer shell. The inner part is divided into an insert and a double-sided pad, which uses a rigid or sliding attached plastic strip provided with a bristle material or bristles to the outer skeleton. Said inner moulded foam insert, skeleton, with an attached plastic strip with a bristle material or bristles are preferably placed in the textile wrap and/or between the textile interlays placed between the rigid outer skeleton and the bristle material or bristles to guarantee minimal adhesion with the outer skeleton.
Another solution, which comes close to a good solution of the problem is the example of pat. ETS2004250340, where inner and outer layers of the protection helmet are described as overlapping one another and are connected in such a way that allows for the frictional shifting of at least one area of the outer layer over the inner layer. This friction is reduced thanks to the randomized spherical surfaces on the outer side of one of the inner parts.
A well-known, successful solution can be found in the Czech patent application no. 2016-467, which describes a helmet consisting of a solid, outer shell and an inner energy absorbing layer, where the inner, energy absorbing layer is formed by a framework of shaped, inflatable airtight cushions and inserts, connected together, in which these shaped, inflatable cushions can be placed individually in the textile coating and/or between the textile interlays placed between the solid, outer skeleton and the framework of the shaped, inflatable cushions.
Although, none of the above stated solutions are quite effective enough during an impact, coming from any given side, or they are too technologically difficult.
Summary of the Invention
The object of the present invention is a helmet dampening system capable of significantly eliminating impacts leading to the rotation of the head during a perpendicular or slanted impact and which is capable of effectively dampening any unsafe movement of the head and brain.
So far, the stated shortcomings of the well-known helmet dampening systems listed above, largely remove the dampening system connected to the inner side of the helmet’s shell, whose nature is reliant in that it consists of shaped single-chamber or multi-chamber, mutually separated airtight cushions, conveniently manufactured from a plastic foil PE/PE, with a thickness of 42pm up to 65pm, arranged at least within one layer, preferably within two layers, one on top of the other, filled with air to the value of the inner pressure, allowing their compression during an impact, placed individually in frames or housings made from a soft foam mass, when these frames are solidly connected to the inner side of the helmet’s shell at the crown of the head, the forehead, the back of the head and the temples, and these shaped, airtight cushions, filled with air and placed within these frames, are connected to the inner side of the helmet’s shell by their detachable, outer side, in the preferred design of, the so-called, Velcro fasteners, and having a connected, detachable lid of the soft foam frame on its inner side facing the user's head which, in one of the preferred designs, is equipped with a textile covering or upholstery on its outer side facing the user's head, when the frames or housings, meant for the placing of the shaped, airtight cushions filled with air are laterally closed or open to the flow of air coming through the inner parts of the helmet, during which time the values of the inner air pressure in the shaped, airtight cushions allow for compression during both a linear and a slanted impact and are set in a range from 0.4 to 2.6 bar.
Use of the helmet damping system, containing air cushions, placed in frames made of a soft foam mass on the inner side of the helmet’s shell, significantly eliminates head rotation and thus, any unsafe movement of the brain during a perpendicular or slanted impact and these impacts are effectively dampened. At the same time, the dampening effect is attained by the properties of these air cushions which, when pressurized to air pressure values in the range of 0.4 to 2.6 bar upon impact, are partially shifted in the frames to thereby dampen the effects of the impact.
Brief Description of the Drawings
The invention will be explained accordingly in these drawings: Fig. 1 represents the air cushion's layout, placed in a closed frame, with the point of perspective coming from inside the helmet, Fig. 2 represents the air cushion's layout, placed in an opened frame, with the point of perspective coming from inside the helmet, Fig. 3 represents the cross-section, single cushion, Fig. 4 represents the cross-section, double cushion, Fig. 5 represents the slanted direction of impact to the double cushion, Fig. 6 represents the ground plan view of the closed frame made from a soft foam material with an inserted, air cushion without a lid, fig. 7 represents the cross- section of this frame, Fig. 8 represents the ground plan view of the opened frame made from a soft foam material with an inserted, air cushion without a lid, Fig. 9 represents the ground plan view of the frame made from a soft foam material with a textile covered lid, Fig. 10 represents the cross-section of this frame, Fig. 11 represents the ground plan view of the frame made from a soft foam material with internal space for an air cushion insert with a lid and without a textile cover, Fig. 12 represents the cross-section of this frame without a textile cover.
Examples of the Embodiment
Ex.l
Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 1, Fig. 3 and Fig. 8 consisting of shaped single-chamber, mutually separated airtight cushions l_, manufactured from a plastic foil PE/PE, with a thickness of 42pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material. The laterally opened frames 2 are solidly connected to the inner side of the helmet’s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions 1, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called Velcro fasteners. The laterally opened frames 2, meant for the arrangement of the shaped, airtight cushions 1 filled with air, support the flow of air coming through the inner parts of the helmet, during which time the values of the inner air pressure in the shaped, airtight cushions l_ allow for compression during both a linear and a slanted impact.
Ex. 2
Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 1, Fig. 4, Fig. 5 and Fig. 8 consisting of shaped single-chamber, mutually separated airtight cushions l_, manufactured from a plastic foil PE/PE, with a thickness of 42pm, arranged in two layers, one on top of the other, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material. The frames 2 are solidly connected to the inner side of the helmet’s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions 1, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called Velcro fasteners. The laterally opened frames 2, meant for the arrangement of the shaped, airtight cushions l_ filled with air, support the flow of air coming through the internal parts of the helmet, during which time the values of the inner air pressure in the shaped, airtight cushions 1 allow for compression during both a linear and a slanted impact.
Ex. 3
Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 2, Fig. 3, Fig. 6 and Fig. 7 consisting of shaped single-chamber, mutually separated airtight cushions l_, manufactured from a plastic foil PE/PE, with a thickness of 52pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally closed frames 2 made from a soft foam material. The laterally closed frames 2 are solidly connected to the inner side of the helmet’s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions l_, filled with air and placed within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called Velcro fasteners. The laterally closed frames 2, meant for the placing of the shaped, airtight cushions l_ filled with air, support the larger stability of the damping system, during which time the flow of air coming through the internal parts of the helmet is minimally limited. The values of the inner air pressure in the shaped airtight cushions 1 allow for compression during both a linear and a slanted impact.
Ex. 4
Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 2, Fig. 4, Fig. 5 and Fig. 6 consisting of shaped single-chamber, mutually separated airtight cushions 1, manufactured from a plastic foil PE/PE, with a thickness of 52pm, arranged in two layers, one on top of the other, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally closed frames 2 made from a soft foam material. The laterally closed frames 2 are solidly connected to the inner side of the helmet’s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions 1, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called Velcro fasteners. The laterally closed frames 2, meant for the arrangement of the shaped, airtight cushions l_ filled with air support the larger stability of the damping system, during which time the flow of air coming through the internal parts of the helmet is minimally limited. The values of the inner air pressure in the shaped airtight cushions 1 allow for compression during both a linear and a slanted impact.
Ex. 5
Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 1, Fig. 3 and Fig. 8 to Fig. 10 consisting of shaped single-chambers, mutually separated airtight cushions J_, manufactured from a plastic foil PE/PE, with a thickness of 42pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material. The frames 2, on their inner side facing the user's head are equipped with a detachable lid 3 made from a soft foam material, which is facing the user's head on its outer side, equipped with a textile cover 4 or upholstery forming the inner lining of the helmet. The lateral frames 2 are solidly connected to the inner side of the helmet’s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions 1, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called Velcro fasteners. The laterally opened frames 2, meant for the arrangement of the shaped, airtight cushions 1 filled with air, support the flow of air coming through the internal parts of the helmet, during which time the values of the inner air pressure in the shaped, airtight cushions l_ allow for compression during both a linear and a slanted impact.
Ex. 6
Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 1, Fig. 4, Fig. 5 and Fig. 8 to Fig. 10 consisting of shaped single-chamber, mutually separated airtight cushions 1, manufactured from a plastic foil PE/PE, with a thickness of 42pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material. The frames 2, on their inner side facing the user's head which, are equipped with a detachable lid 3 made from a soft foam material, which is facing the user's head on its outer side, equipped with a textile cover 4 or upholstery forming the inner lining of the helmet. The laterally opened frames 2 are solidly connected to the inner side of the helmet’ s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions l_, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called Velcro fasteners. The laterally opened frames 2, meant for the arrangement of the shaped, airtight cushions l_ filled with air, support the flow of air coming through the inner parts of the helmet, during which time the values of the inner air pressure in the shaped, airtight cushions 1 allow for compression during both a linear and a slanted impact.
Ex. 7
Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 2, Fig. 3, Fig. 9 and Fig. 10 consisting of shaped single-chambers, mutually separated airtight cushions 1, manufactured from a plastic foil PE/PE, with a thickness of 52pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material. The frames 2, on their inner side facing the user's head which, are equipped with a detachable lid 3 made from a soft foam material, which is facing the user's head on its outer side, equipped with a textile cover 4 or upholstery forming the inner lining of the helmet. The laterally closed frames 2 are solidly connected to the inner side of the helmet’s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions 1, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called, Velcro fasteners. The laterally closed frames 2, meant for the arrangement of the shaped, airtight cushions 1 filled with air, support the larger stability of the damping system, during which time the flow of air coming through the internal parts of the helmet is minimally limited. The values of the inner air pressure in the shaped airtight cushions l_ allow for compression during both a linear and a slanted impact.
Ex. 8
Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 2, Fig. 4, Fig. 5, Fig. 9 and Fig. 10 consisting of shaped single-chamber, mutually separated airtight cushions 1, manufactured from a plastic foil PE/PE, with a thickness of 42pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material. The frames 2, on their inner side facing the user's head which, are equipped with a detachable lid 3 made from a soft foam material, which is facing the user's head on its outer side, equipped with a textile cover 4 or upholstery forming the inner lining of the helmet. The laterally closed frames 2 are solidly connected to the inner side of the helmet’s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions l_, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called Velcro fasteners. The laterally closed frames 2, meant for the arrangement of the shaped, airtight cushions l_ filled with air, support the larger stability of the damping system, during which time the flow of air coming through the internal parts of the helmet is minimally limited. The values of the inner air pressure in the shaped airtight cushions 1 allow for compression during both a linear and a slanted impact. Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 1, Fig. 3, Fig.8 and Fig. 11 to 12 are consisting of shaped single-chamber, mutually separated airtight cushions 1, manufactured from a plastic foil PE/PE, with a thickness of 52pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material. The frames 2, on their inner side facing the user's head which, are equipped with a detachable lid 3 made from a soft foam material, forming the inner lining of the helmet. The laterally opened frames 2 are solidly connected to the inner side of the helmet’ s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions 1, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side with the so-called Velcro fasteners. The laterally opened frames 2, meant for the arrangement of the shaped, airtight cushions l_ filled with air, support the flow of air coming through the internal parts of the helmet, during which time the values of the inner air pressure in the shaped, airtight cushions 1 allow for compression during both a linear and a slanted impact.
Ex. 10
Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 1, Fig. 4, Fig. 8 and Fig. 11 to 12 are consisting of shaped single-chamber, mutually separated airtight cushions l_, manufactured from a plastic foil PE/PE, with a thickness of 42pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material. The frames 2, on their inner side facing the user's head which, are equipped with a detachable lid 3 made from a soft foam material, forming the inner lining of the helmet. The laterally opened frames 2 are solidly connected to the inner side of the helmet’ s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions 1, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side, with the so-called Velcro fasteners. The laterally opened frames 2, meant for the arrangement of the shaped, airtight cushions 1 filled with air, support the flow of air coming through the internal parts of the helmet, during which time the values of the
9 inner air pressure in the shaped, airtight cushions 1 allow for compression during both a linear and a slanted impact.
Ex. 11
Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 2, Fig. 3, Fig. 6 and Fig. 11 to 12 are consisting of shaped single-chamber, mutually separated airtight cushions l_, manufactured from a plastic foil PE/PE, with a thickness of 52pm, arranged in one layer, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally opened frames 2 made from a soft foam material. The frames 2, on their inner side facing the user's head which, are equipped with a detachable lid 3 made from a soft foam material, forming the inner lining of the helmet. The laterally closed frames 2 are solidly connected to the inner side of the helmet’ s shell 5at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions l_, filled with air and arranged within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side, with the so-called Velcro fasteners. The laterally closed frames 2, meant for the arrangement of the shaped, airtight cushions 1 filled with air, support the larger stability of the damping system, during which time the flow of air coming through the internal parts of the helmet is minimally limited. The values of the inner air pressure in the shaped airtight cushions 1 allow for compression during both a linear and a slanted impact.
Ex. 12
Damping system connected to the inner side of the helmet’s shell 5 according to Fig. 2, Fig. 4, Fig. 6 and Fig. 11 to 12 are consisting of shaped single-chamber, mutually separated airtight cushions 1, manufactured from a plastic foil PE/PE, with a thickness of 52pm, arranged in two layers, one on top of the other, filled with air to the value of the inner pressure within the range of 0.4 to 2.6 bar and circumferentially welded by an impulsive weld, allowing for compression during an impact, arranged individually on the laterally closed frames 2 made from a soft foam material. The frames 2, on their inner side facing the user's head which, are equipped with a detachable lid 3 made from a soft foam material, forming the inner lining of the helmet. The laterally closed frames 2 are solidly connected to the inner side of the helmet’s shell 5 at the crown of the head, the forehead, the back of the head and the temples, and the shaped, airtight cushions 1, filled with air and placed within these frames 2, are connected to the inner side of the helmet’s shell 5 by their detachable, outer side, with the so-called Velcro fasteners. The laterally closed frames 2, meant for the arrangement of the shaped, airtight cushions 1 filled with air, support the larger stability of the damping system, during which time the flow of air coming through the internal parts of the helmet is minimally limited. The values of the inner air pressure in the shaped airtight cushions 1 allow for compression during both a linear and a slanted impact.
Industrial Applicability
The damping system connected to the inner side of the helmet's shell, according to this invention, is usable for both sports helmets and work protection helmets, although especially usable for helmets present in cycling and similar sports.

Claims

Claims
1. The damping system connected to the inner side of the helmet’s shell (5) is characterized in that it consists of shaped single-chamber or multi-chamber, mutually separated airtight cushions (1), filled with air to the value of the inner pressure allowing for compression during an impact, arranged individually in frames (2) or housings made from a soft foam material, when these frames (2) are solidly connected to the inner side of the helmet’s shell (5), while the frames (2) or casings, meant for the arrangement of the shaped airtight cushions (1), filled with air are laterally closed or opened by the airflow coming through the inner parts of the helmet.
2. The damping system according to claim 1 is characterized in that the shaped, mutually separated airtight cushions (1), filled with air to the value of the inner pressure, allowing for compression during an impact, are arranged in the frame (2) in at least one layer.
3. The damping system according to claims 1 and 2 is characterized in that the values of the inner air pressure in the shaped airtight cushions (1) allow for their compression during both a linear and a slanted impact, and reach a range of 0.4 to 2.6 bar.
4. The damping system according to claims 1 through 3 is characterized in that the individual shaped, airtight cushions (1) are arranged in the frames (2), situated, at the least, at the crown of the head, the forehead, the back of the head and the temples, and are detachably connected to the inner side of the helmet’s shell.
5. The damping system according to claims 1 through 3 is characterized in that the individual shaped, airtight cushions (1), arranged in the frames (2), situated, at the least, at the crown of the head, the forehead, the back of the head and the temples, and to the inner side of the helmet’s shell (5) connected by its outer side detachably, are provided on its inner side facing the user's head with a detachably connected lid (3) of the frame (2) made from a soft foam material , forming the inner lining.
6. The damping system according to claims 1 through 4 is characterized in that the detachably connected lid (3) of the frame (2) made from a soft foam material is on its outer side facing the user's head, equipped with a textile cover (4) or upholstery.
7. The damping system according to claims 1 through 5 is characterized in that the shaped airtight cushions (1) are connected to the inner side of the helmet’s shell (5) detachably by the Velcro fasteners.
8. The damping system according to claims 1 through 6 is characterized in that the shaped airtight cushions (1) are manufactured from a plastic foil PE/PE, with a thickness of 42 pm to 65 pm.
PCT/CZ2019/050009 2018-03-06 2019-03-05 Helmet damping system WO2019170179A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE449054B (en) * 1983-03-22 1987-04-06 Frosta Fritid Ab Comfort fixture for protective helmet
US20050268383A1 (en) * 2004-06-07 2005-12-08 Acsas Technology Corporation Shock balance controller
US8336122B1 (en) * 2010-09-16 2012-12-25 Harris Kerry S Method of manufacturing a cranial shock absorption system
US20140068841A1 (en) * 2012-09-13 2014-03-13 George Malcolm Brown Helmet structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE449054B (en) * 1983-03-22 1987-04-06 Frosta Fritid Ab Comfort fixture for protective helmet
US20050268383A1 (en) * 2004-06-07 2005-12-08 Acsas Technology Corporation Shock balance controller
US8336122B1 (en) * 2010-09-16 2012-12-25 Harris Kerry S Method of manufacturing a cranial shock absorption system
US20140068841A1 (en) * 2012-09-13 2014-03-13 George Malcolm Brown Helmet structure

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