EP3253244B1 - Casque avec de multiples zones de protection - Google Patents

Casque avec de multiples zones de protection Download PDF

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Publication number
EP3253244B1
EP3253244B1 EP16747362.8A EP16747362A EP3253244B1 EP 3253244 B1 EP3253244 B1 EP 3253244B1 EP 16747362 A EP16747362 A EP 16747362A EP 3253244 B1 EP3253244 B1 EP 3253244B1
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EP
European Patent Office
Prior art keywords
helmet
outer shell
shell
force
recited
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP16747362.8A
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German (de)
English (en)
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EP3253244A1 (fr
EP3253244A4 (fr
Inventor
Loubert S. Suddaby
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Individual
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Individual
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Priority claimed from US14/615,011 external-priority patent/US10517347B2/en
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Publication of EP3253244A1 publication Critical patent/EP3253244A1/fr
Publication of EP3253244A4 publication Critical patent/EP3253244A4/fr
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    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/06—Impact-absorbing shells, e.g. of crash helmets
    • A42B3/062—Impact-absorbing shells, e.g. of crash helmets with reinforcing means
    • A42B3/065—Corrugated or ribbed shells
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/06—Impact-absorbing shells, e.g. of crash helmets
    • A42B3/062—Impact-absorbing shells, e.g. of crash helmets with reinforcing means
    • A42B3/063—Impact-absorbing shells, e.g. of crash helmets with reinforcing means using layered structures
    • A42B3/064—Impact-absorbing shells, e.g. of crash helmets with reinforcing means using layered structures with relative movement between layers
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/06—Impact-absorbing shells, e.g. of crash helmets
    • A42B3/067—Impact-absorbing shells, e.g. of crash helmets with damage indication means

Definitions

  • the invention relates to protective headgear, more particularly to sports or work place protective headgear, and still more particularly, to protective headgear designed to prevent or reduce head injury caused by linear or rotational forces.
  • the human brain is an exceedingly delicate structure protected by a series of envelopes to shield it from injury.
  • the innermost layer, the pia mater covers the surface of the brain.
  • the arachnoid layer a spidery web-like membrane that acts like a waterproof membrane.
  • the dura mater a tough leather like layer, covers the arachnoid layer and adheres to the bones of the skull.
  • MTBI Mild traumatic brain injury
  • concussion is a type of brain injury that occurs frequently in many settings such as construction worksites, manufacturing sites, and athletic endeavors and is particularly problematic in contact sports. While at one time concussion was viewed as a trivial and reversible brain injury, it has become apparent that repetitive concussions, even without loss of consciousness, are serious deleterious events that contribute to debilitating disease processes such as dementia and neuro-degenerative diseases for example Parkinson's disease, chronic traumatic encephalopathy (CTE), and pugilistic dementias.
  • Parkinson's disease Parkinson's disease
  • CTE chronic traumatic encephalopathy
  • U.S. Patent No. 5,815,846 by Calonge describes a helmet with fluid filled chambers that dissipate force by squeezing fluid into adjacent equalization pockets when external force is applied.
  • energy is dissipated only through viscous friction as fluid is restrictively transferred from one pocket to another.
  • Energy dissipation in this scenario is inversely proportional to the size of the hole between the full pocket and the empty pocket. That is to say, the smaller the hole, the greater the energy drop.
  • the problem with this design is that, as the size of the hole is decreased and the energy dissipation increases, the time to dissipate the energy also increases.
  • fluid filled chambers react hydraulically, energy transfer is in essence instantaneous, hence, in the Calonge design, substantial energy is transferred to the brain before viscous fluid can be displaced negating a large portion of the protective function provided by the fluid filled chambers. Viscous friction is too slow an energy dissipating modification to adequately mitigate concussive force. If one were to displace water from a squeeze bottle one can get an idea as to the function of time and force required to displace any fluid when the size of the exit hole is varied. The smaller the transit hole, the greater the force required and the longer the time required for any given force to displace fluid.
  • U.S. Patent No. 3,872,511 to Nichols discloses a helmet with hard inner and outer shells with an intermediate zone between the two shells.
  • the zone contains a plurality of fluid-filled bladders that are held to the inner surface of the outer shell by means of a valve.
  • the valve closes upon impact causing the air to be retained in the bladders to cushion the impact from the user's head.
  • the ' 511 patent makes no provision for mitigation of rotational forces striking the helmet.
  • U.S. Patent No. 6,658,671 to Hoist discloses a helmet with an inner and outer shell with a sliding layer in between.
  • the sliding layer allows for the displacement of the outer shell relative to the inner shell to help dissipate some of the angular force during a collision applied to the helmet.
  • the force dissipation is confined to the outer shell of the helmet.
  • the Hoist helmet provides no mechanism to return the two shells to the resting position relative to each other.
  • a similar shortcoming is seen in the helmet disclosed in U.S. Patent No. 5,596,777 to Popovich and European patent publication EP 0048442 to Kalman, et al.
  • German Patent DE 19544375 to Zhan discloses a construction helmet that includes apertures in the hard outer shell that allows the expansion of what appears to be a foam inner liner through the apertures to dispel some of the force of a collision. However, because the inner liner appears to rest against the user's head, some force will be directed toward rather than away from the head. In addition, there is no mechanism to return the expanded foam liner back to the inside of the helmet.
  • U.S. Patent Application Publication No. 2012/0198604 to Weber, et al. discloses a safety helmet for protecting the human head against repetitive impacts as well as moderate and sever impacts to reduce the likelihood of brain injury caused by both translational and rotational forces.
  • the helmet includes isolation dampers that act to separate an outer liner from an inner liner. Gaps are provided between the ends of the outer liner and the inner liner to provide space to enable the outer liner to move without contacting the inner liner upon impact.
  • isolation dampers and outer liners are necessary and no effective protection is provided to protect the brain from direct translational blows.
  • US 2,306,362 discloses a protective helmet with a stiffened crown which reposes on a plurality of sinusoidal springs.
  • any force, angular or linear, imparted to the exterior of the helmet must also be prevented from simply being transmitted to the enclosed skull and brain. That is to say that the helmet must not merely play a passive role in dampening such external forces, but must play an active role in dissipating or misdirecting both linear and angular momentum imparted by said forces such that they have little or no deleterious effect on the delicate brain.
  • the helmet To achieve these ends one must conceive of the helmet much as biologic evolution has of the skull and the brain. That is to say, to afford maximal protection from linear and angular forces, the skull and the brain must be capable of movement independent of each other, and to have mechanisms which dissipate imparted kinetic energy, regardless of the vector or vectors by which it is applied.
  • the inner component (shell) and the outer component (shell or shells) must be capable of appreciable degrees of movement independent of each other. Additionally, the momentum imparted to the outer shell should both be directed away from and/or around the underlying inner shell and brain and sufficiently dissipated so as to negate deleterious effects.
  • An example useful to understand the invention comprises a protective helmet that includes a hard outer shell the hard outer shell including a plurality of apertures; a hard inner shell; a padded inner liner functionally attached to the hard inner shell; a plurality of fluid-filled bladders positioned between the outer shell and the padded inner liner; and, a plurality of elastomeric cords connecting the outer shell and the inner liner.
  • An alternate example useful to understand the present invention includes a hard outer shell the hard outer shell including a plurality of apertures; a hard inner shell; a padded inner liner functionally attached to the hard inner shell; an intermediate shell contacting the padded inner liner and enclosing a quantity of cushioning pieces; a plurality of fluid-filled bladders positioned between the outer shell and the padded inner liner; and, a plurality of elastomeric cords connecting the outer shell and the inner liner and passing through the intermediate shell.
  • One or more of the elastomeric cords may have a thin portion and a thick portion, while one or more cords may have uniform thickness.
  • the present invention includes protective helmet having multiple protective zones comprising an impenetrable outer protective zone formed by a hard outer shell, the outer shell including a plurality of apertures; an anchor zone formed by a hard inner shell; an inner zone formed by a padded inner liner functionally attached to the hard inner shell; and, an elastomeric zone formed by a plurality of leaf springs positioned between the outer shell and the inner shell.
  • Each of the plurality of leaf springs includes at least one elastic member and an anchor point.
  • the helmet may include an intermediate shell contacting the padded inner liner and enclosing a quantity of cushioning pieces.
  • a plurality of elastomeric cords may be present that connect the inner shell and outer shell passing through any intermediate structures.
  • the elastomeric cords may have uniform thickness and/or thick and thin portions in the same individual cord.
  • an articulated protective helmet comprising a hard outer shell having at least two parts, said at least two parts each joined by an articulating means; an ear aperture in two of the at least two parts; a plurality of protective pads attached to an inner surface of the hard outer shell; and a locking means to releasably lock the articulated helmet in a closed position.
  • a protective helmet having multiple protective zones comprising: an inner shell having a first inner surface and a first outer surface; a padded inner lining attached to said first inner surface; a hard outer shell having second inner surface and a second outer surface, said hard outer shell functionally attached to said inner shell: an elastomeric zone between said first outer surface and said second inner surface; and, a plurality of sinusoidal springs positioned in said elastomeric zone.
  • One object of the invention is to provide a helmet that will direct linear and rotational forces away from the braincase.
  • a second object of the invention is to supply a helmet that includes an outer shell that floats or is suspended above the inner shell.
  • a third object of the invention is to offer a helmet with a sliding connection between the inner and outer shells.
  • An additional object of the invention is to supply a helmet that includes a crumple zone to absorb forces before they reach the braincase of the user.
  • An additional object of the invention is to offer a helmet with a capacity to measure the force of a blow received by the helmet.
  • a further object of the invention is to provide a helmet that is comfortable to put on while providing the protection of a helmet with a snug fit.
  • proximate is synonymous with terms such as “nearby”, “close”, “adjacent”, “neighboring”, “immediate”, “adjoining”, etc., and such terms may be used interchangeably as appearing in the specification and claims.
  • a helmet in the present invention, includes multiple protective zones formed in layers over the user's skull or braincase.
  • the outer protective zone is formed by an outer shell that "floats" or is suspended on the inner shell such that rotational force applied to the outer shell will cause it to rotate, or translate around the inner shell rather than immediately transfer such rotational or translational force to the skull and brain.
  • the inner shell and outer shell are connected to each other by elastomeric cords that serve to limit the rotation of the outer shell on the inner shell and to dissipate energy by virtue of elastic deformation rather than passively transferring rotational force to the brain as with existing helmets.
  • these elastomeric cords function like mini bungee cords that dissipate both angular and linear forces through a mechanism known as hysteretic damping i.e. when elastomeric cords are deformed, internal friction causes high energy losses to occur.
  • elastomeric cords are of particular value in preventing so called corcoup brain injury.
  • the outer shell in turn floats on the inner shell by virtue of one or more force absorbers or deflectors such as, for example, fluid filled bladders, leaf springs, or sinusoidal springs, located between the inner shell and the outer shell.
  • the fluid filled bladders interposed between the hard inner and outer shells may be intimately associated with, that is located under, one or more apertures in the outer shell with the apertures preferably being covered with elastomeric diaphragms and serving to dissipate energy by bulging outward against the elastomeric diaphragm whenever the outer shell is accelerated, by any force vector, toward the inner shell.
  • the diaphragms could be located internally between inner and outer shells, or at the inferior border of the inner and outer shells, if it is imperative to preserve surface continuity in the outer shell. This iteration would necessitate separation between adjacent bladders to allow adequate movement of associated diaphragms.
  • any force imparted to the outer shell will transfer to the gas or liquid in the bladders, which in turn will instantaneously transfer the force to the external elastomeric diaphragms covering the apertures in the outer shell.
  • the elastomeric diaphragms in turn will bulge out through the aperture in the outer shell, or at the inferior junction between inner and outer shells thereby dissipating the applied force through elastic deformation at the site of the diaphragm rather than passively transferring it to the padded lining of the inner shell.
  • This process directs energy away from the brain and dissipates it via a combination of elastic deformation and tympanic resonance or oscillation.
  • an elastic diaphragm employs the principle of hysteretic damping over and over, thereby maximizing the conversion of kinetic energy to low level heat, which in turn is dissipated harmlessly to the surrounding air.
  • the elastomeric springs or cords that bridge the space holding the fluid filled bladders serve to stabilize the spatial relationship of the inner and outer shells and provide additional dissipation of concussive force via the same principle of elastic deformation via the mechanism of stretching, torsion and even compression of the elastic cords.
  • both linear and rotational forces can be effectively dissipated.
  • leaf springs may replace fluid-filled bladders as a force absorber/deflector.
  • Leaf springs may be structured as a fully elliptical spring or, preferably, formed in a parabolic shape. In both forms, the leaf spring is anchored at a single point to either the outer shell or, preferably, the hard inner shell and extend into the zone between the outer shell and inner shell.
  • the springs may have a single leaf (or arm) or comprise a plurality of arms arrayed radially around a common anchor point.
  • each arm tapers from a thicker center to thinner outer portions toward each end of the arm. Further, the ends of each arm may include a curve to allow the end to more easily slide on the shell opposite the anchoring shell.
  • the distal end of the spring arms are not attached to the nonanchoring or opposite shell. This allows the ends to slide on the shell to allow independent movement of each shell when the helmet is struck by rotational forces. This also enables the frictional dissipation of energy.
  • the distal ends contact the opposite shell in the neutral condition, that is, when the helmet is not in the process of being struck.
  • the orientation of the cords will be similar to their use with the fluid-filled bladders/ diaphragm example , but will be utilized to absorb rotational forces as the leaf springs will handle the liner forces more directly.
  • my design by employing elastomeric cords and diaphragms can protect against concussion as well as so called coup and corcoup brain injury and torsional brain injury which can cause subdural hematoma by tearing of bridging veins or injury to the brain stem through twisting of the stem about its central axis.
  • Figure 1 is a front view of multiple protective zone helmet 10 ("helmet 10 ").
  • the outer protective zone is formed by outer shell 12 and is preferably manufactured from rigid, impact resistant materials such as metals, plastics such as polycarbonates, ceramics, composites and similar materials well known to those having skill in the art.
  • Outer shell 12 defines at least one and preferably a plurality of apertures 14.
  • Apertures 14 may be open but are preferably covered by a flexible elastomeric material in the form of diaphragm 16.
  • helmet 10 also includes several face protection device attachments 18.
  • face protection device attachments 18 are fabricated from a flexible elastomeric material to provide flexibility to the attachment.
  • FIG. 1 is a side view of helmet 10 showing two face protection device attachments 18a and 18b on one side of the helmet. Examples of face protection devices are visors and face masks. Such attachments can also be used for chin straps releasably attached to the helmet in a known manner.
  • Figure 3A is a cross section view of helmet 10 showing the hard inner shell 20 and the elastomeric springs or cords 30 ("cords 30 ") that extend through an elastomeric zone connecting the two shells.
  • Inner shell 20 forms an anchor zone and is preferably manufactured from rigid, impact resistant materials such as metals, plastics such as polycarbonates, ceramics, composites and similar materials well known to those having skill in the art.
  • Inner shell 20 and outer shell 12 are slidingly connected at sliding connection 22. By slidingly connected is meant that the edges of inner shell 20 and outer shell 12, respectively, slide against or over each other at connection 22.
  • outer shell 12 and inner shell 20 are connected by an elastomeric element, for example a u-shaped elastomeric connector 22a ("connector 22a ").
  • Sliding connection 22 and connector 22a each serve to both dissipate energy and maintain the spatial relationship between outer shell 12 and inner shell 20.
  • Cords 30 are flexible cords, such as bungee cords or elastic "hold down” cords or their equivalents used to hold articles on car or bike carriers. This flexibility allows outer shell 12 to move or “float” relative to inner shell 20 and still remain connected to inner shell 20. This floating capability is also enabled by the sliding connection 22 between outer shell 12 and inner shell 20.
  • sliding connection 22 may also include an elastomeric connection 22a between outer shell 12 and inner shell 20.
  • Padding 24 forms an inner zone and lines the inner surface of inner shell 20 to provide a comfortable material to support helmet 10 on the user's head.
  • padding 24 may enclose a loose cushioning pieces such as STYROFOAM® beads 24a or "peanuts" or loose oatmeal.
  • FIG. 3A Also seen in Figure 3A is a cross section view of bladders 40 situated in the elastomeric zone between outer shell 12 and inner shell 20.
  • Helmet 10 includes at least one and preferably a plurality of bladders 40.
  • Bladders 40 are filled with fluid, either a liquid such as water or a gas such as helium or air. In one example , the fluid is helium as it is light and its use would reduce the total weight of helmet 10.
  • bladders 40 may also include compressible beads or pieces such as STYROFOAM® beads. Bladders 40 are preferably located under apertures 14 of outer shell 12 and are in contact with both inner shell 20 and outer shell 12.
  • bladders 40 will compress and squeeze bladder 40, similar to squeezing a balloon.
  • Bladder 40 will bulge toward aperture 14 and displace elastomeric diaphragm 16. This bulging-displacement action diverts the force of the blow from the user's skull and brain up toward the aperture providing a new direction for the force vector.
  • Bladders 40 may also be divided internally into compartments 40a by bladder wall 41 such that if the integrity of one compartment is breached, the other compartment will still function to dissipate linear and rotational forces.
  • Valve(s) 42 may also be included between the compartments to control the fluid movement.
  • Figure 3B is a cross section view similar to Figure 3 discussed above depicting an alternate example of helmet 10.
  • Helmet 10 in Figure 3B includes a crumple zone formed by intermediate shell 50 located between outer shell 12 and inner shell 20.
  • intermediate shell 50 is close to or adjacent to inner shell 20.
  • intermediate shell 50 encloses filler 52.
  • filler 52 is a compressible material that is packed to deflect the energy of a blow to protect the skull, similar to a "crumple zone" in a car.
  • the filler is designed to crumple or deform, thereby absorbing the force of the collision before it reaches inner pad 24 and the brain case.
  • cords 30 extend from inner shell 20 to outer shell 12 through intermediate shell 50.
  • One suitable filler 52 is STYROFOAM® beads or "peanuts” or equivalent material such as is used in packing objects. Because of its "crumpling" function, intermediate shell 50 is preferably constructed with softer or more deformable materials than outer shell 12 or inner shell 20.
  • Typical fabrication material for intermediate shell 50 is a stretchable material such as latex or spandex or other similar elastomeric fabric that preferably encloses filler 52.
  • Figure 3C is a cross section view similar to Figure 3A depicting an alternate example of helmet 10 in which elastomeric cords 31 ("cords" 31 ) have thin and thick portions.
  • the thick elastomeric portions may be anchored on either the inner surface of outer shell 12 or outer surface of inner shell 20.
  • the thin nonelastomeric portions of cords 31 may be attached to either the inner surface of outer shell 12 or the outer surface of inner shell 20.
  • the thin elastomeric portions may be a single or multiply cord.
  • Figure 4 is a schematic view of cords 31 in a neutral position and in maximal deployment when helmet 10 is hit with greater than normal force. Also seen are cords 30 which have uniform thickness throughout their lengths. In the neutral position on the left of Figure 4 , cords 30 are under slight tension while cords 31 are under not tension. As seen on the right of Figure 4 , under maximal displacement of outer shell 12 relative to inner shell 20, cords 30 may be stretched close or up to its elastic limit, but the thin portion of cord 31 has now engaged the thicker portion to mitigate the large force striking helmet 10 and to prevent any loss of elasticity in cord 30. By using cord 31 as a backup for blows struck with severe force, greater protection can be achieved even after the cord 30 reaches its elastic limit and does not interfere with absorbing the any rotational force striking helmet 10. For this reason, cord(s) 31 will act to preserve the integrity of the cord system of helmet 10.
  • FIG. 5A is a top view of one section of outer shell 12 of helmet 10 showing an alternate example in which liftable lids 60 (“lid 60 ”) are used to cover aperture 14 to shield diaphragm 16 and/or bladder 40 from punctures, rips, or similar incidents that may destroy their integrity.
  • Lids 60 are attached to outer shell 12 by lid connector 62 ("connector 62 ") in such a way that they will lift or raise up if a particular diaphragm 16 bulges outside of aperture 14 due to the expansion of one or more bladders 40, exposing it to additional collisions.
  • lid 60 allows diaphragm 16 to freely elastically bulge through aperture 14 above the surface of outer shell 12 to absorb the force of a collision, but still be protected from damage caused by external forces.
  • diaphragm 16 is not used and lid 60 directly shields and protects bladder 40.
  • lids 60 are attached to outer shell 12 using hinges 62.
  • lids 60 are attached using flexible plastic attachment 62.
  • Figure 5B depicts liftable lid 60 protecting bladder 40 as it bulges above outer shell 12.
  • Figure 6A is an exploded view showing one method cord 30 is attached to helmet 10 to enable outer shell 12 to float over inner shell 20.
  • Cavities 36 preferably with concave sides 36a, are drilled or otherwise placed in outer shell 12 and inner shell 20 so that the holes are aligned.
  • Each end of cord 30 is attached to plugs 32 which are then placed in the aligned holes.
  • plugs 32 are held in cavities 36 using suitable adhesives known to those skilled in the art.
  • plugs 32 are held in cavities 36 with a friction fit or a snap fit.
  • Figure 6B is a cross section of the completed fitting in which cord 30 is attached to two plugs 32 and extends between outer shell 12 and inner shell 20. Also seen is intermediate shell 50 enclosing filler 52. Not seen are bladders 40 which would be situated between intermediate shell 50 (or inner shell 20 ) and outer shell 12. Persons of skill in the art will recognize that cords 31 may be attached between outer shell 12 and inner shell 20 in a similar manner.
  • FIG. 7 is a cross section view of an alternate example of helmet 10 in which bladders 40 are replaced as force absorbers/deflectors with parabolic leaf springs 41 ("springs 41 ").
  • springs 41 are anchored onto inner shell 20 at anchor point 42.
  • Springs 41 include at least one arm 43 with two ends 43a which are preferably shaped into a curve as shown.
  • Arms 43 are preferably tapered having a thicker center portion near anchor point 42 and gradually thinning in width and/or thickness towards ends 43a.
  • arms 43 may be laminated with gradually fewer elastic layers applied more distally from anchor point 42.
  • a plurality of arms 43 may be arrayed radially around and attached to a single anchor point 42.
  • leaf springs 41 may also be used with elastomeric cords 30.
  • Figure 7A is an alternate example in which elliptical leaf springs 41a ("springs 41a "), also attached at a single anchor point 42 are used in place of parabolic leaf springs 41.
  • Figure 8 is a cross section of the alternate example of helmet 10 shown in Figure 7 showing the use of leaf springs 41 with both elastomeric cords 30 and cords 31.
  • cords 31, whose thick portions are thicker than uniform cords 30, act as a backup to prevent cords 30 from being stretched beyond their elastic limit.
  • the thick portions may be attached to either outer shell 12 or inner shell 20.
  • Figure 9 is a cross section view of helmet 10 illustrating leaf springs 41 anchored on outer shell 12 with cords 30. It is understood that cords 31 may also be used with this example .
  • FIGs 10A and 10B depict schematically the action of leaf springs 41 when helmet 10 is struck by a force.
  • helmet 10 is in the neutral state.
  • Springs 41 are shown in relatively slight tension on all sides of helmet 10.
  • force F strikes helmet 10 from the right hand side. Ends 43a are separated further from each other as arms 43 are pushed toward inner shell 20 to absorb the translational force vector created by force F.
  • ends 43a' of arms 43' of the springs 41' located on the opposite side of helmet 10 move closer together as the tension on arms 43' is reduced as the left side of outer shell 12 is temporarily moved away from inner shell 20.
  • Figure 11 is an enlarged schematic cross section of the crumple zone 50 in helmet 10 in which leaf spring 41 is the force absorber/deflector.
  • Elastomeric cords 30 extend from inner shell 20 to outer shell 12.
  • Crumple zone 50 is seen between cords 30 and preferably comprises SORBOTHANE® or other viscoelastic materials 52.
  • SORBOTHANE® is in the shape of cones.
  • Viscoelastic materials provide the advantage of behaving like a quasi-liquid, being readily deformed by an applied force and slow to recover, although in the absence of such a force it takes up a defined shape and volume. An unusually high amount of the energy from an object dropped onto SORBOTHANE® is absorbed.
  • Leaf spring 41 is seen anchored to inner shell 20 and extending up through crumple zone 50 and contacting outer shell 12.
  • cones 52 in crumple zone 50 acts to absorb a blow having much greater than normal force so that springs 41 are deflected to such a degree that outer shell reaches crumple zone 50.
  • Figure 12 is a top view of crumple zone 50 showing a plurality of cords 30 extending between the cones 52 of the viscoelastic material. It is understood that a helmet 10 employing fluid-filled bladders 40 may include a crumple zone 50 having viscoelastic materials 52 such as SORBOTHANE®.
  • FIGS 13A and 13B are front views of articulating helmet 100 ("helmet 100 ") which is divided into at least two parts that are attached by articulating means.
  • articulating is meant a helmet possesses parts or sections joined by articulating means such as hinge or pivot connections, swivels, or other devices that can allow separate parts of a helmet to be opened and closed together.
  • Each section includes hard outer shell 101.
  • FIG. 13A shows helmet 100 in the closed and locked orientation. Sections 102a and 102b are joined by articulating means 104.
  • articulating means 104 is hinge 104. It will be recognized that more than one hinge 104 or other articulating means may be used to open and close helmet 100.
  • helmet 100 includes at least one lock 106 to hold helmet 100 in the closed position. Ear apertures 108 are also shown along with inner surface 103.
  • Figure 13B shows helmet 100 in the open orientation. Lock 106 is unlocked allowing hinge 104 to open separating sections 102a and 102b.
  • FIGs 14A and 14B depict front views of an alternate example of helmet 100 having three sections 103a, 103b, and 103c.
  • helmet 100 also includes air vents 110 which are openings extending from outer surface 101 through to inner surface 103 of helmet 100 and defined by helmet 100.
  • Hinges 104 pivot to move sections 103b and 103c closed with section 103a.
  • One or more locks 106 hold the sections in the closed position.
  • air vents 110 may be present in helmets with two or more than three sections such as seen in Figures 13A and 13B.
  • Figure 13B shows helmet 100 in the open position in which both hinges 104 open to separate sections 103b and 103c from section 103a.
  • Figure 15 is a side view of the two section example of helmet 100 with the addition of air vents 110. Also seen are two hinges 104. Similarly, Figure 16 is a side view of the three section example of helmet 100 showing two hinges 104 for section 102c.
  • Figure 17 is a front view of another alternate example of articulating helmet 100 in which pads or cushions 112 are attached to inner surface 101a of helmet 100.
  • Pads 112 may either be permanently attached to the inner surface 103 (not seen in Figure 17 ) with suitable attachment devices such as rivets or screws or by adhesives.
  • Pads may be made of foam materials well known in the art.
  • pads 112 may by releasably attached to inner surface 103 using hook and loop material such as VELCRO®. This provides the advantage of enabling the user to obtain and arrange cushions 112 that will provide a snug fit when helmet 110 is worn. In both examples , pads 112 are attached to inner surface 101a between vents 110 to ensure as much air as possible reaches the user.
  • Figure 17A is a front view of a user showing articulating helmet 100 which is seen in cross section.
  • Pads 112 are seen contacting the top of the head of user U providing a snug fit.
  • pads 112 are attached to inner surface 101 a in such a way as to leave air vents 110 open to provide air flow to the head.
  • ear apertures 108 are covered with a membrane or diaphragm 108a.
  • diaphragm 108a is fabricated from KEVLAR® fabric.
  • Figures 18 and 18A are front views of articulating helmet 100 demonstrating an example in which one section of helmet 100 may nest inside the other.
  • section 102b is nested inside section 102a.
  • Articulating means 104a is a swivel that not only holds the two sections together, but is also configured to allow sections 102a and 102b to open and to turn so that the outer surface of outer shell 101 of one section faces inner surface 101a of the other section. This example provides the advantage of decreasing the overall volume of helmet 100 in the open position making it easier to store.
  • Figure 19A depicts an enlarged cross section view of one example of swivel means 104a that enables sections 102a and 102b to turn nest within one another.
  • Cable 105 is attached to section 102b and universal joint 107.
  • Universal joint 107 is attached by spring 109 to section 102b and is embedded in section 102a.
  • Spring 109 acts to pull cable 105 plus attached section 102b toward section 102a.
  • Universal joint 107 allows cable 105 to rotate.
  • Figure 19B shows the two sections 102a and 102b pulled apart with stretched spring 105 holding the two sections together. Also seen are male prongs or tubes 120 which slide into ports 122 to stabilize the helmet when sections 102a and 102b are joined together.
  • universal joint 107 enables section 102b to rotate relative to section 102a after which section 102b is pulled back toward section 102a. Because section 102b has been rotated, it will nest against inner surface 101a of section 102a.
  • FIG 20 is a side perspective view of an embodiment of the helmet of the current invention with outer shell 202 removed.
  • Helmet 200 includes an integral or continuous outer shell 202 (not shown in Figure 20 ) and inner shell 204 functionally connected.
  • integral or continuous is meant that shell 202 is formed as a single unit.
  • functionally connected is meant that outer shell 202 and inner shell 204 are connected such that outer shell 202 may move, such as rotate, relative to inner shell 204 such as, for example, the sliding connection 22 discussed above.
  • Elastomeric zone 203 (“zone 203 ”) lies between outer shell 202 and inner shell 204.
  • At least one sinusoidal spring 208 (spring(s) 208 ") is positioned in zone 203.
  • Figure 20 depicts a preferred embodiment in which a plurality of springs 208 are positioned in zone 206.
  • springs 208 are sinusoidal springs 208 having a shape similar to or identical with a series of sine waves and can be manufactured as described in U.S. Patent Application Publication No. 2012/00773884 and U.S. Patent No. 4,708,757 both to Guthrie.
  • the distal end of at least one of springs 208 is in operative contact with force indicator tab 216 ("tab 216 ").
  • operative contact is meant that a component or device contacts but is not connected to a second component and causes that second component to function.
  • the operative contact end of spring 208 contacts the proximal edge of tab 216 so that when spring 208 is extended, it pushes tab 216 to an outer position toward the outer perimeter of helmet 200.
  • tab 216 remains in its outer position.
  • Tab 216 preferably is a multi-color panel as represented by the different cross hatching patterns on the surface of tab 216 seen in Figure 20 .
  • Tab 216 is positioned within channel 212 which is position on outer surface 205 of inner shell 204.
  • Channel 212 includes parallel rails 214 with tab 216 positioned between rails 214. In this way, tab 216 is always pushed in the same direction when spring 206 is extended.
  • Outer shell 202 defines at least one window 210, seen in shadow, positioned so that tab 216 can be viewed through window 210 if spring 208 is extended sufficiently to push tab 216 into channel 212.
  • rivet 218 forms the attachment of the plurality of springs 206 to outer shell 202 to form a radial or "spider-like" array of springs 208.
  • Figure 20A depicts an alternate embodiment of the helmet labeled helmet 200A in which outer shell 202 comprises overlapping plates 202a ("plates 202a ") which extend over helmet 200 and forms the outer wall or cover of elastomeric zone 203. Plates 202a may be arranged in rows.
  • Figure 20A also depicts a preferred arrangement of sinusoidal springs 208 in which three springs 208 extend along inner shell 204 with the at least one end of at least one springs 208 in operative contact with tabs 216. As shown, springs 208 may be arranged separately under rows of plates 202 a. Although not shown in Figure 20A , the opposing ends of each of springs 208 may also be in operative contact with a tab 216.
  • tab 216 is positioned within rails 214 of channel 212.
  • Outer shell 202 defines at least one window 210 in one of plates 202a positioned so that tab 216 can be viewed through window 210 if spring 208 is extended sufficiently through channel 212.
  • Figure 21 is a cross section of helmet 200 through a sinusoidal spring 208.
  • Spring 208 is positioned in elastomeric zone 203 resting on surface 205.
  • One end of spring 208 is either close to or in contact with tab 216 which is positioned between rails 214. In the resting or neutral position shown, tab 216 is under outer shell 202 and not exposed under window 210.
  • Spring(s) 208 may be attached to either outer shell 202 or inner shell 204.
  • Figure 22 shows the same view of helmet 200 as seen in Figure 21 in which force A, represented by arrow A, is applied to helmet 200.
  • the force may be a blow impacting helmet 200.
  • the shaded view of outer shell 202 and spring 208 show those components in the neutral state.
  • the solid view shows outer shell 202 pressed into elastomeric zone 203 by force A.
  • force A strikes shell 202, one or more of springs 208 are pushed into a compressed mode as seen by the reduced amplitude of the sine wave formed in sinusoidal spring 208 as well as the expanded length of spring 208.
  • spring 208 lengthens as represented by arrow B, it pushes tab 216 toward and/or into window 210.
  • the increase in length of spring 208 is a function of the amount of force striking helmet 200.
  • the amount of exposure of tab 216 in window 210 depends on the amount of force striking helmet 200.
  • tab 216 includes different colors, such as green, yellow, and red, or other indicators, each of which may appear in window 210 depending on the force of the blow. It will be recognized that more than one spring 208 may be extended when helmet 200 is struck.
  • Figure 23 depicts the same view seen in Figures 21 and 22 after outer shell 202 and sinusoidal spring 208 have returned to the neutral position.
  • the return movement of outer shell 202 is shown by arrow C while the return of spring 208 is shown by arrow D.
  • Tab 216 is seen remaining under window 210 after spring 208 retracts.
  • Figure 24 is a cross section of helmet 200a seen in Figure 20A depicting how overlapping plates 202a are connected to each other and still retain the ability to move in response to forces applied to helmet 200a.
  • Sinusoidal spring 208 is seen confined between plates 202a and outer surface 205 of inner shell 204. Also seen is the distal end of spring 216 in operative contact with force indicator tab 216.
  • Window 210 is seen defined by an edge portion 211 of helmet 200a. It may also be defined by one of plates 202a.
  • articulating plates 202a are attached using a male-female connection in which a round pin 220 is inserted into round socket 222.
  • cover 207 which may overlay articulating plates 202a.
  • cover 207 is made from a fabric such as KEVLAR® that provides an integral cover over the individual plates 202a but allows movement of individual plates.
  • articulating plates 202a can be replaced by an integral hard outer shell 202 as seen in Figure 20 above.
  • Figures 25 and 26 are similar to Figures 22 and 23 , respectively, in showing outer shell 202a compressed by force A and returning to the neutral state as represented by arrow C.
  • tab 216 remains displayed in window 210 indicating at least semi-quantitatively, the amount of force that struck helmet 202a, after spring 208 retracts (arrow D ).
  • semi-quantitatively is meant that the degree of exposure of tab 216 under window 210 indicates if a one impact hits helmet 200 with greater force than a second impact, even if an exact measurement of each impact is not obtained.
  • the indicator(s) on tab 216 displayed in window 210 can be used to show how far spring 208 extended and thus the amount of force that struck helmets 200 and 200a.
  • Springs 208 may be fabricated with suitable calibrated or measured tension using known methods to extend to appropriate lengths depending on the force of the impact to indicate in at least a semi-quantitative manner the amount of force striking helmet 200 (or helmet 200a ) and thus possibly affecting the user.
  • Tab 216 may be returned to its neutral position using a screwdriver or other implement to move it back into operative contact with spring 208. In some embodiments, a minimum or sufficient amount of force may be necessary to move tab 216 into window 210. If the striking force is below this minimum, spring 208 will not lengthen sufficiently to move tab 216 into window 210 indicating the striking force was insufficient to cause injury to the user.
  • Figure 27 is a transverse cross section illustrating another alternate embodiment of helmet 200 to include a tab indicator to measure at least semi-quantitatively rotational force striking helmet 200.
  • sinusoidal springs 208 are removed for clarity but persons of skill in the art will recognize that at least one spring 208 may be used in helmets 200 and 200a with this embodiment.
  • Support 230 is fixedly attached to inner shell 204 on surface 205.
  • Support 230 extends across zone 203 and contacts inner surface 213 of outer shell 202.
  • Arms 230a extend from support 230 generally transversely along inner surface 213 of outer shell 202. Arms 230a are in operative contact with tab indicators 216a which are positioned in rails 214 (not shown).
  • double arrow E represents rotational force, e.g. force striking from an angle relative to helmet 200 (or helmet 200a ). Because inner shell 204 is stationary relative to the rotational motion of outer shell 202, which is suspended on inner shell 204 by springs 208, support 230 and attached arms 230a remain stationary relative to outer shell 202. Tab indicators 216a rotate with outer shell 202 against stationary arms 230a which forces them to move along rails 214. As seen in Figure 29 , when outer shell 202 returns to the neutral position after the hit, tab indicator 216a remains in rails 214 where they have been pushed. If the rotational force is sufficient, tab indicators 216a will be displayed in window 210 indicating helmet 200 was hit with sufficient rotational force to display indicator 216a, thus indicating a possible injury to the user.
  • rotational force e.g. force striking from an angle relative to helmet 200 (or helmet 200a ).

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Helmets And Other Head Coverings (AREA)

Claims (13)

  1. Casque de protection (200) ayant des zones de protection multiples, comprenant :
    une coque intérieure (204) ayant une première surface intérieure et une première surface extérieure (205) ;
    une doublure intérieure rembourrée fixée à ladite première surface intérieure ;
    une coque extérieure dure (202) ayant une deuxième surface intérieure (213) et une deuxième surface extérieure, ladite coque extérieure dure (202) fonctionnellement fixée à ladite coque intérieure (204) ;
    une zone élastomérique (203) entre ladite première surface extérieure (205) et ladite deuxième surface intérieure (213) ; et
    une pluralité de ressorts sinusoïdaux (208) positionnés dans ladite zone élastomérique (203),
    caractérisé en ce que
    ladite coque extérieure (202) a au moins une fenêtre (210) définie par ladite coque extérieure dure (202) ;
    le casque de protection (200) comprend en outre un languette indicatrice de force (216) en contact opérationnel avec au moins une extrémité d'au moins un de ladite pluralité de ressorts sinusoïdaux (208) ; et
    ladite languette indicatrice de force (216) est déplacée jusqu'à ladite au moins une fenêtre (210) par ladite au moins une extrémité dudit au moins un de ladite pluralité de ressorts sinusoïdaux (208) lorsque le casque (200) est impacté avec une force suffisante.
  2. Casque de protection (200) selon la revendication 1, dans lequel ladite coque extérieure dure (202) comprend une pluralité de plaques en chevauchement (202a).
  3. Casque de protection (200) selon la revendication 2, dans lequel ladite pluralité de plaques en chevauchement (202a) est agencée en au moins deux rangées.
  4. Casque de protection (200) selon la revendication 3, dans lequel au moins un de ladite pluralité de ressorts sinusoïdaux (208) est positionné sous ladite au moins une rangée de plaques en chevauchement (202a).
  5. Casque de protection (200) selon la revendication 1, dans lequel au moins un de ladite pluralité de ressorts sinusoïdaux (208) est fixé à ladite première surface extérieure (205).
  6. Casque de protection (200) selon la revendication 1, dans lequel au moins un de ladite pluralité de ressorts sinusoïdaux (208) est fixé à ladite deuxième surface intérieure (213).
  7. Casque de protection (200) selon la revendication 2, dans lequel chacune de ladite pluralité de plaques en chevauchement (202a) est fixée à au moins une autre plaque en chevauchement (202a).
  8. Casque de protection (200) selon la revendication 1, dans lequel ladite languette indicatrice de force (216) est positionnée dans une fente ou entre deux rails (214).
  9. Casque de protection (200) selon la revendication 1, dans lequel ladite fixation fonctionnelle inclut une partie de ladite coque intérieure (204) autour d'un bord de ladite coque extérieure dure (202).
  10. Casque de protection (200) selon la revendication 9, dans lequel ledit point de fixation est sur ladite coque intérieure (204).
  11. Casque de protection (200) selon la revendication 10, dans lequel ledit point de fixation est sur ladite coque extérieure (202).
  12. Casque de protection (200) selon la revendication 1, comprenant en outre
    un bras flexible attaché de manière fixe à ladite première surface extérieure (205) et contactant ladite deuxième surface intérieure (213) ; et
    une paire de bras transversaux (230a) fixés audit bras flexible s'étendant de façon opposée et transversale le long de ladite deuxième surface intérieure (213).
  13. Casque de protection (200) selon la revendication 12, comprenant en outre une autre languette indicatrice de force (216a) en contact opérationnel avec au moins une extrémité d'au moins un de ladite paire de bras transversaux (230a) ;
    dans lequel ladite autre languette indicatrice de force (216a) est déplacée vers au moins une fenêtre (210) par ladite au moins une extrémité dudit au moins un de ladite paire de bras transversaux (230a) lorsque ledit casque (200) est impacté par une force suffisante ; et
    dans lequel au moins une de ladite au moins une fenêtre (210) s'étend dans un sens de façon générale transversal.
EP16747362.8A 2015-02-05 2016-02-05 Casque avec de multiples zones de protection Active EP3253244B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/615,011 US10517347B2 (en) 2012-03-06 2015-02-05 Helmet with multiple protective zones
PCT/US2016/016840 WO2016127095A1 (fr) 2015-02-05 2016-02-05 Casque avec de multiples zones de protection

Publications (3)

Publication Number Publication Date
EP3253244A1 EP3253244A1 (fr) 2017-12-13
EP3253244A4 EP3253244A4 (fr) 2018-09-05
EP3253244B1 true EP3253244B1 (fr) 2020-01-15

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Application Number Title Priority Date Filing Date
EP16747362.8A Active EP3253244B1 (fr) 2015-02-05 2016-02-05 Casque avec de multiples zones de protection

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EP (1) EP3253244B1 (fr)
CN (1) CN107404961B (fr)
WO (1) WO2016127095A1 (fr)

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CN106235493A (zh) * 2016-09-19 2016-12-21 广西钦州展兴建设工程有限公司 一种建筑用安全帽
CN108613594A (zh) * 2018-07-16 2018-10-02 李永强 一种旋转式防弹头盔及防弹套装
CN111109750B (zh) * 2020-01-07 2022-06-24 中国十七冶集团有限公司 一种抗撞击双重防护式护具保护装置

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US4708757A (en) * 1986-07-21 1987-11-24 Guthrie Walker L Method of forming corrugated panel
US5319808A (en) * 1992-06-01 1994-06-14 Fibre-Metal Products Co. Impact absorbing protective cap
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GB0116738D0 (en) * 2001-07-09 2001-08-29 Phillips Helmets Ltd Protective headgear and protective armour and a method of modifying protective headgear and protective armour
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KR100537220B1 (ko) * 2004-01-14 2005-12-20 주식회사 산청 안전모 내피와 그 제조방법
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Also Published As

Publication number Publication date
CN107404961B (zh) 2020-12-04
WO2016127095A1 (fr) 2016-08-11
EP3253244A1 (fr) 2017-12-13
CN107404961A (zh) 2017-11-28
EP3253244A4 (fr) 2018-09-05

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