Fiber reinforced helmet
View Patent ↗A helmet with an outer shell made from a fiber reinforced material, and preferably a fiber reinforced polymer. The helmet preferably has a critical impact area that contains a greater concentration of fibers. Preferably, the helmet has a weight, offset, and dimensions which are comparable to a helmet with an outer shell that is not made from a fiber reinforced material. The helmet is preferably stiffer and more protective than a conventional helmet not having a fiber reinforced outer shell.
1. A helmet, comprising:
an outer shell made from a fiber reinforced material, wherein said outer shell comprises a critical impact area that contains a greater concentration of fibers than the remainder of said outer shell, wherein said outer shell comprises a front, a rear, a crown, a first side and a second side, wherein the critical impact area is at least partially positioned in the first side, and wherein said outer shell comprises:
a first fiber layer that forms at least a portion of each of the front, the crown, the first side and the second side;
a second fiber layer that forms at least a portion of each of the rear, the crown, and the first side;
a third fiber layer that forms at least a portion of each of the rear, the crown, and the second side;
a fourth fiber layer that forms at least a portion of each of the front and the first side; and
a fifth fiber layer that forms at least a portion of each of the rear and the first side.
2. The helmet of claim 1 , wherein said outer shell is configured for use as a baseball batting helmet and said outer shell comprises an ear flap joined with and extending downward from said first side.
3. The helmet of claim 2 , wherein said outer shell comprises a plurality of overlapping fiber layers that comprise said first, second, third, fourth, and fifth fiber layers.
4. The helmet of claim 3 , wherein each of said fiber layers comprises a weave of weft and warp tows oriented generally perpendicular to each other, and wherein each of said weft and warp tows comprises a plurality of fibers generally oriented in the same direction.
5. The helmet of claim 4 , wherein said critical impact area comprises at least two of said fiber layers oriented with respect to each other such that said weft and warp tows of one of said fiber layers are each positioned at a 45 degree angle with respect to said weft and warp tows of the other of said fiber layers.
6. The helmet of claim 4 , wherein there are six of said overlapping fiber layers in at least a portion of said critical impact area, three of said overlapping fiber layers in at least a portion of said front, four of said overlapping fiber layers in at least a portion of said left side or right side that does not include said critical impact area, five of said overlapping fiber layers in at least a portion of said rear, and four of said overlapping fiber layers in at least a portion of said crown.
7. The helmet of claim 4 , wherein said weave comprises a four harness satin weave.
8. The helmet of claim 4 , wherein each of said weft and warp tows comprises 12,000 fibers.
9. The helmet of claim 4 , wherein each of said fiber layers comprises a weight per area of 660 grams per square meter.
10. The helmet of claim 2 , wherein said outer shell comprises outer and inner surfaces, and further comprising padding coupled to said inner surface.
11. The helmet of claim 10 , wherein said outer shell and padding combined have a weight of between 17 to 21 ounces.
12. The helmet of claim 11 , wherein said outer shell and padding combined have a weight of between 18 to 20 ounces.
13. The helmet of claim 10 , wherein said padding comprises a thickness of between 0.25 to 1.25 inches.
14. The helmet of claim 13 , wherein said padding comprises a thickness of between 0.25 to 0.75 inches.
15. The helmet of claim 14 , wherein said padding comprises a thickness of between 0.25 to 0.5 inches.
16. The helmet of claim 15 , wherein said padding comprises a thickness of 0.28 inches.
17. The helmet of claim 10 , wherein the combination of said outer shell and said padding have a Severity Index, as defined in the National Operating Committee on Standards for Athletic Equipment's NOCSAE DOC 001-11m11 titled Standard Test Method and Equipment Used in Evaluating the Performance Characteristics of Protective Headgear/Equipment, of not greater than 750 when tested in accordance with the National Operating Committee on Standards for Athletic Equipment's NOCSAE DOC 022-10m11a titled Standard Performance Specification for Newly Manufactured Baseball/Softball Batter's Helmets as modified so that all projectiles used in the test are baseballs, the velocity of all baseballs used in the test is 90 miles per hour, and all tests are conducted at ambient temperature.
18. The helmet of claim 17 , wherein the combination of said outer shell and said padding have a Severity Index, as defined in the National Operating Committee on Standards for Athletic Equipment's NOCSAE DOC 001-11m11 titled Standard Test Method and Equipment Used in Evaluating the Performance Characteristics of Protective Headgear/Equipment, of not greater than 500 when tested in accordance with the National Operating Committee on Standards for Athletic Equipment's NOCSAE DOC 022-10m11a titled Standard Performance Specification for Newly Manufactured Baseball/Softball Batter's Helmets as modified so that all projectiles used in the test are baseballs, the velocity of all baseballs used in the test is 90 miles per hour, and all tests are conducted at ambient temperature.
19. The helmet of claim 2 , wherein said right and left sides move closer to each other by 1 inch when a pressure of greater than 60 pounds per square inch is applied to said left or right side.
20. The helmet of claim 19 , wherein said right and left sides move closer to each other by 1 inch when a pressure of between 80 to 120 pounds per square inch is applied to said left or right side.
21. The helmet of claim 1 , wherein said shell comprises a fiber reinforced polymer, and wherein said fiber comprises carbon and said polymer comprises epoxy.