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US 5,687,426 AGranted
Bicycle helmet
AssigneeElasto Form
InventorGerhard Sperber
Life of this patent
Estimating the term…
Abstract
A bicycle helmet including a pair of spaced synthetic plastic shells and contains an opening having an annular wall surface connecting the shells, the annular wall being successively axially convergent and divergent, thereby to reinforce the helmet, and to afford circulation of air to the user's head.
Claims17
A bicycle helmet, comprising:
- an integrally molded helmet body having an inner shell and an outer shell, the inner and outer shells being concentrically spaced apart and integrally connected to each other by first shell connecting means disposed proximate an edge portion of the helmet body, the inner and outer shells further being integrally connected by second shell connecting means disposed proximate an intermediate portion of the shells spaced from the edge portion, the second shell connecting means including an annular wall of a through opening contained in the helmet body between the shells, the annular wall including integrally molded converging wall portion and diverging wall portion in a direction from the outer shell to the inner shell, thereby to reinforce the helmet body, the spaced apart inner and outer shells forming an air passageway therebetween, the air passageway being filled with air;
- and
- an air outlet being disposed on the helmet body, the air outlet being in fluid communication with the air passageway, the air in the air passageway being dischargeable through the air outlet in case a shock or impact force results in a pressure on the shells.
A bicycle helmet, comprising:
- an integrally molded helmet body having an inner shell and an outer shell, the inner and outer shells being concentrically spaced apart and integrally connected to each other by first shell connecting means disposed proximate an edge portion of the helmet body, the inner and outer shells further being integrally connected by second shell connecting means disposed proximate an intermediate portion of the shells spaced from the edge portion, the second shell connecting means including an annular wall of a through opening contained in the helmet body between the shells, the annular wall including integrally molded converging wall portion and diverging wall portion in a direction from the outer shell to the inner shell, thereby to reinforce the helmet body, the spaced apart inner and outer shells forming an air passageway therebetween, the air passageway being filled with air;
- the inner shell having at least one strengthening rib portion extending away from the air passageway, being disposed proximate an intermediate area of the inner shell, and being distant from and disconnected from the second shell connecting means and from the through opening, the at least one strengthening rib portion being configured to provide additional safety in case that the outer shell is forced in contact with the inner shell;
- and
- the outer shell having at least one strengthening rib portion extending into the air passageway and being disposed proximate a side area of the outer shell, and being distant from and disconnected from the second shell connecting means and the through opening, so as to provide the helmet with additional strength.
1 more element
Dependencies are inferred from the claim text.