Football helmet

Abstract

The present invention is a football helmet designed to reduce the occurrence of concussions and subconcussive impacts to the brain through use of a novel exterior shape and sandwich of materials. The present invention also reduces the occurrence of neck injuries through the use of a flexible neck support that provides protection against frontal impacts without restricting a player's range of motion.

Claims

1. A helmet comprising: a rigid layer capable of being worn over a user's head; an inner layer fixed to an inside surface of the rigid layer and capable of absorbing impact energy; and an outer layer fixed to an outside surface of the rigid layer and capable of absorbing impact energy, and wherein each of said inner and outer layers comprises a plurality of grooves for allowing flexure of the helmet in a vicinity of a neck of the user, and wherein said rigid layer ends at a point above said plurality of grooves and said inner and outer layers extend below said point.

2. The helmet of claim 1, wherein said inner layer has a density between 15 and 50 pounds per cubic foot.

3. The helmet of claim 2, wherein said outer layer has a density between two and 15 pounds per cubic foot.

4. The helmet of claim 1, wherein said inner layer comprises a viscoelastic foam.

5. The helmet of claim 4, wherein said outer layer comprises a viscoelastic foam.

6. The helmet of claim 5, wherein the viscoelastic foam of said inner layer has an open-cell structure and is capable of molding to the contour of the head of the user wearing said helmet.

7. The helmet of claim 6, wherein the viscoelastic foam of said outer layer has an open-cell structure and is capable of absorbing high impact energy.

8. The helmet of claim 7, wherein said inner layer has a density between 15 and 50 pounds per cubic foot.

9. The helmet of claim 8, wherein said outer layer has a density between two and 15 pounds per cubic foot.

10. The helmet of claim 9, wherein said inner layer further comprises an additional layer of viscoelastic foam with a density between two and 15 pounds per cubic inch.

11. The helmet of claim 10, wherein said helmet further comprises a layer of abrasion resistant material fixed to an outer surface of said outer layer.

12. The helmet of claim 11, wherein said abrasion resistant material comprises a polyester material.

13. The helmet of claim 11, wherein said abrasion resistant material comprises carbon fiber cloth.

14. The helmet of claim 11, wherein said rigid layer further comprises carbon fiber.

15. The helmet of claim 14, wherein said outer layer has a cone shaped peak with a rounded apex.

16. The helmet of claim 15, wherein said apex is located on top of a centerline of the helmet when viewed from a front of the helmet.

17. The helmet of claim 16, further comprising two ear holes, each ear hole located substantially over a respective ear of the user when the user is wearing said helmet; wherein said apex is located at rear of a vertical line drawn from the center of one ear hole when said helmet is upright and viewed from a side of the helmet.

18. The helmet of claim 17, wherein when said helmet is upright and viewed from the side, when a line is drawn between one ear hole and said apex, the angle between the line drawn and the vertical line of claim 17 is between zero and 35 degrees.

19. The helmet of claim 1, wherein one or more of said grooves have a curved profile.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

(1) FIG. 1 is a perspective view of the invention with a facemask attached.

(2) FIG. 2 is a front view of the invention without a facemask attached.

(3) FIG. 3 is a left side view of the invention without a facemask attached. The left side and right side of the invention are substantially mirror images of each other.

(4) FIG. 4 is a rear view of the invention without a facemask attached.

(5) FIG. 5 is a left side sectioned view of the invention without a facemask attached.

(6) FIG. 6 is a sectioned view of the invention at a facemask anchor point showing the layers used in the invention and the edge detail.

(7) FIGS. 7A and 7B are schematic views showing the layers used in the invention.

DETAILED DESCRIPTION OF THE INVENTION

(8) In FIG. 1 is a perspective view of the invention comprising a football helmet 10 with a novel shape and sandwich of materials. In this view, a facemask 11 is attached to the helmet 10 using facemask mounted snaps 12. In the preferred embodiment, the facemask 11 is comprised of carbon fiber to reduce the overall weight of the helmet.

(9) Visible in FIG. 1 is the outer layer 13 of the helmet 10 and the inner layer 14. The outer layer 13 covers the exterior of the helmet and meets the inner layer 14 at a seam 15 on the inside edge of the helmet and at a seam 16 on the inside edge of each ear hole 17. At the portion of the helmet 10 closest to a person's neck, the outer layer 13 contains multiple grooves 18 that are roughly parallel to the ground when the helmet is upright. The grooves 18 allow the helmet 10 to flex near the neck, providing support to the neck in a frontal impact without restricting a player's range of motion. Also visible in FIG. 1 is the subtle cone shape of the helmet with a rounded apex 19 positioned to the rear of the top of the helmet relative to a user when viewed from the side.

(10) FIG. 2 is a front view of the helmet 10 without a facemask attached. Visible in this view is the outer layer 13 and the inner layer 14. The seam 15 between the outer layer 13 and inner layer 14 is shown in this view as it continues along the inside edge of the helmet 10. The inner layer 14 contains multiple grooves 20 that are similar to the grooves 18 in the outer layer 13. The inner grooves 20 are roughly parallel to the ground when the helmet is upright and allow the helmet 10 to flex near the neck to provide support without restricting a player's range of motion.

(11) On the front of the helmet, four helmet mounted snaps 21 extend through the outer layer 13 to provide a location for the facemask mounted snaps 12 to attach. The apex 19 is located substantially on the centerline of the helmet when viewed from the front so that the right half and the left half of the helmet are substantially mirror images of each other.

(12) FIG. 3 is a left side view of the helmet 10 without a facemask attached. Only the outer layer 13 is visible in this view because the seams 15 and 16 are on the inside edges of the helmet 10 and on the inside edge of the ear holes 17. Two of the helmet mounted snaps 21 are visible in this view, extending through the outer layer 13. The side profile of the grooves 18 are visible in this view and show the curved profile of the grooves in the preferred embodiment. Various types of reliefs or a reduction in the thickness of the outer layer 13 could be used to increase the flexibility of the material in the neck area. In addition, the use of a different material at the neck area could provide more or less rigidity as required.

(13) The location of apex 19 is best defined in the side view of FIG. 3. The position of the cone's rounded apex is positioned to the rear of the top of the helmet relative to a user when viewed from the side. Using a vertical line originating from the center of the ear hole 17, and a line originating from the center of the ear hole 17 and intersecting the helmet at the apex 19, Angle “A” defines the angle between the two lines at the center of the ear hole. The apex 19 provides the most impact deflection when located at a point rearward of the vertical line so that the apex 19 is most effective when Angle “A” is greater than zero. In the preferred embodiment shown in this application, Angle “A” is approximately 25 degrees. The ideal location of the apex 19 depends on the weight of the player and the height of the apex above the outer surface of the helmet. In various embodiments, the location of the apex 19 is effective when Angle “A” is between zero and 35 degrees.

(14) FIG. 4 is a rear view of the helmet 10 without a facemask attached. Similar to FIG. 3, only the outer layer 13 is visible in this view because the seams 15 and 16 are on the inside edges of the helmet 10 and on the inside edge of the ear holes 17. Two of the helmet mounted snaps 21 are visible in this view where they extend through the outer layer 13.

(15) The rear view of the outer grooves 18 can be seen in this view. The outer grooves 18 generally follow the bottom edge of the rear of the helmet 10 and are generally parallel to the ground when the helmet is upright. The apex 19 of the helmet 10 is located on the centerline of the helmet.

(16) In FIG. 5 is a left side sectioned view of the helmet 10 showing the sandwich of materials that is part of the invention. The inner layer 14 is an impact absorbent material designed to eliminate gaps between a player's head and the helmet and to cushion impacts. The outer layer 13 is also an impact absorbent material, but it is designed to resist abrasions and allow the application of a surface color or design. Between the outer layer 13 and inner layer 14 is a rigid core 22 that provides structure to the helmet and protection against larger impacts to the head.

(17) Shown in the sectioned view is the detail of the seam 15 where the outer layer 13 and inner layer 14 meet. The rigid core 22 ends before the edge of the helmet 10 and the outer layer 13 rolls about the edge to meet the inner layer 14 on the inner edge of the helmet 10. At the base of the helmet above the neck, the rigid core 22 ends at a point 23 above the outer grooves 18 and inner grooves 20. Because the rigid core 22 is not flexible, only the outer layer 13 and inner layer 14 are present below point 23 to allow the helmet to flex with a player's movements. While a sectioned view of the seam 16 around the ear holes 17 is not provided, it is substantially similar to the sectioned view of the seam 15 about the edge of the helmet 10.

(18) In the preferred embodiment, the inner layer 14 is comprised of viscoelastic polyurethane foam (“viscoelastic foam”). This material is also known as low-resilience polyurethane foam, memory foam or temper foam, along with other names. Viscoelastic foam is pressure and temperature sensitive and quickly molds to the contour of an object pressed against it. Viscoelastic foam's ability to mold around the contour of an object makes it an ideal material for the interior of a helmet. It's use inside a helmet allows the same helmet to contour to multiple players and eliminate gaps between the inner layer 14 and a player's head without resorting to an expensive helmet customization process.

(19) Viscoelastic foam also provides effective impact cushioning and temperature control. Viscoelastic foam is excellent at absorbing impact and when used as the inner layer 14, provides impact absorption between a player's head and the rigid core 22. Viscoelastic foam also stabilizes the temperature of objects placed against it. It tends to absorb and release heat slowly, allowing the material to stabilize the temperature of a player's skin.

(20) More specifically, the preferred invention uses an inner layer 14 comprised of a viscoelastic foam with gel-like properties, an open cell structure and a soft dough-like consistency. Viscoelastic foam with a density between 15 and 50 pounds per cubic foot is particularly effective at maintaining its shape when worn by a user and providing effective impact cushioning. An important characteristic of the material used in the preferred embodiment is that it is capable of easily mold around a user's head to eliminate gaps.

(21) The inner layer 14 may optionally include an additional layer of lightweight viscoelastic foam 141 to absorb the impact energy from sudden impacts. A material that is particularly well suited for this purpose is an elastomeric, polyurethane viscoelastic open cell foam with a density between two and 15 pounds per cubic foot. When an additional layer of lightweight viscoelastic foam 141 is used in the inner layer 14, it is most effective when used as a sandwich layer within the gel-like viscoelastic foam 142 (as shown in FIG. 7A) or used between the gel-like viscoelastic foam 142 and the rigid core 22 (as shown in FIG. 7B). While the use of viscoelastic foam has been disclosed as the preferred embodiment, it is appreciated that other materials with similar impact absorbing and density properties would also be suitable for this application.

(22) In the present invention, the rigid core 22 is comprised of a carbon fiber reinforced polymer (“carbon fiber”). Carbon fibers, when combined with a plastic resin, form the composite commonly known as carbon fiber, a material that is particularly strong for its weight. Because of carbon fiber's high strength to weight ratio, it is particularly well suited for use as the rigid core 22 in the present invention. A lightweight material is advantageous in a helmet because it reduces the mass located about a player's head, therefore reducing the magnitude of impacts.

(23) While carbon fiber is well suited for use as the rigid core 22, it is appreciated that there are multiple materials that would be suitable. For instance, Exotex® Dacron has a high strength to weight ratio that exceeds that of carbon fiber and would also be an ideal material for the rigid core 22 when combined with a plastic resin. Other type of basalt fiber based composite materials would have similar high strength and low weight characteristics. The purpose of the rigid core 22 is to provide structure to the helmet 10 and many materials could be suitable based on the desired weight, crush resistance and cost of the helmet.

(24) In the preferred embodiment, the outer layer 13 is comprised of a layer of lightweight viscoelastic foam to absorb the impact energy from sudden impacts on the exterior of the helmet. A material that is particularly well suited for this purpose is an elastomeric, polyurethane viscoelastic open cell foam with a density between two and 15 pounds per cubic foot. It is appreciated that other materials with impact absorbing properties would be suitable for use as the outer layer 13. While a viscoelastic foam is used in the preferred embodiment, other materials capable of absorbing high impact energy would also be suitable.

(25) To increase the water resistance of the outer layer 13, a waterproof coating may optionally be applied. Various waterproof coatings would be suitable, including, but not limited to, room temperature vulcanization silicone. To increase the abrasion resistance of the outer layer 13, the outer surface may optionally be wrapped with a flexible abrasion resistant material 131, such as a fiber reinforced cloth. Various reinforced materials would be suitable, including, but not limited to, Exotex® Dacron cloth.

(26) In the preferred embodiment, the apex 19 on the exterior of the helmet is formed by increasing the thickness of the outer layer 13 in the area of the apex. Increasing the thickness of only the outer layer 13 allows the rigid core 22 and inner layer 14 to remain molded to the shape of a user's head as a user does not typically have an apex protruding from their head in the area of apex 19. Building up the outer layer 13 provides additional impact absorption material in the area of the apex and provides a helmet shape that is less likely to produce an elastic collision when compared to a helmet with a nearly spherical exterior.

(27) In FIG. 6 is a side sectioned view of a helmet mounted snap 21 showing the mounting detail and the edge detail of the helmet. The helmet mounted snaps 21 are mounted to the rigid core 22. To position the helmet mounted snaps at an effective height beyond the outer layer 13, the rigid core contains circular extrusions 24 that extend towards the outside of the helmet. The circular extrusions 24 have the added benefit of moving the mounting hardware for the helmet mounted snaps 21 further from a user's head.

(28) The outer layer 13 is mounted to the outer surface of the rigid core 13 and extends around the edge of the helmet. The inner layer 14 is mounted to the inner surface of the rigid core 13 and meets the outer layer 14 at seam 15 running along the inside edge of the helmet.

(29) What has been described is a football helmet designed to reduce the occurrence of concussions and the magnitude of subconcussive impacts to the head. While this disclosure shows the invention as a football helmet, all or part of the invention is capable of being used in other applications. In this disclosure, there is shown and described only the preferred embodiment of the invention, but, as aforementioned, it is to be understood that the invention is capable of use in various other combinations and environments and is capable of changes or modifications within the scope of the inventive concept as expressed herein.