Patent ID: 11926398
Assignee: THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF THE NAVY
Field: Transport (Mechanical engineering)
Classification: CPC B  A | IPC A  B

Claim 3:
4. A helmet, comprising:
an exterior surface;
an interior region for a user's head;
an interior wall within the interior region;
a substantially oval-shaped head-entry opening leading to the interior region;
a substantially oval-shaped neck dam mating surface extending about the substantially oval-shaped head-entry opening;
an oral nasal mask located within the interior region; and
an adjustable device configured to maintain a user's mouth and nose within the oral nasal mask, wherein the adjustable device comprises:
a harness having an upper portion attached to the interior wall of the helmet and a lower portion;
a cable secured to the lower portion; and
a rotatable member attached to the exterior surface of the helmet and engaged with the cable, wherein rotation in a first direction moves the harness forward so as to maintain the user's mouth and nose within the oral nasal mask and in a second direction that moves the harness backward.