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US 9,414,632 B1Granted
Concussion prevention helmet
OwnerPhilip Dougherty, Joni Carlsoninventors
Life of this patent
Estimating the term…
Abstract
A helmet accessory is provided, the helmet having an outer surface shaped to cover at least a portion of a user's head, the accessory including a first layer disposed over the shell of the helmet, the first layer having a coefficient of friction less than the coefficient of friction of the outer surface of the shell.
Claims18
A helmet accessory attached to a helmet having an outer surface shaped to cover at least a portion of a user's head, the accessory comprising:
- a first layer disposed over a shell of the helmet, the first layer having a coefficient of friction less than a coefficient of friction of the outer surface of the shell;
- and
- a third layer disposed between the first layer and the shell of the helmet, wherein the third layer is made with an energy absorbing material and wherein the first layer and a second layer are formed as a unit to be removably attached to the helmet.
A helmet accessory attached to a helmet having an outer surface shaped to cover at least a portion of a user's head, the accessory comprising:
- a first layer disposed over a shell of the helmet, the first layer having a coefficient of friction less than 0.08;
- and
- a third layer disposed between the first layer and the shell of the helmet, wherein the third layer is made with an energy absorbing material having a thickness between about 0.25 inches to about 1 inch thick and wherein the first layer and a second layer are formed as a unit to be removably attached to the helmet.
Dependencies are inferred from the claim text.