Improved protective hood
AssigneeEssex PB&R Corporation
InventorBradley Niemann
Life of this patent
Estimating the term…
Abstract
A neck seal for use in an emergency breathing apparatus has an interior and an exterior and is formed of an annular sheet of elastomeric material having a substantially central aperture for donning over a person's head. The substantially central aperture is sized appropriately for snug fitting around the person's neck so as to be sufficiently tight to prevent passage between the person's neck and the neck seal of fluid materials without choking the person. The neck seal is coated at least in part with parylene, to thereby prevent passage through the elastomeric material of NBC/CBR materials.
Claims15
A protective hood having a neck seal for use in an emergency breathing apparatus having an interior and an exterior;
- the neck seal comprising:
- a protective hood having a base opening for fitting over a user's head said opening having circumferentially connected thereabout,
- an annular sheet of elastomeric material having a substantially central aperture for donning over a person's head, the substantially central aperture being sized appropriately for snug fitting around the person's neck so as to be sufficiently tight to prevent passage between the person's neck and the neck seal of fluid materials without choking the person;
- wherein the the annular sheet of elastomeric material is coated at least in part with parylene, to thereby prevent passage through the elastomeric material of NBC/CBR materials;
- and wherein the central aperture of the annular sheet has a contiguous collar extending from the central aperture's inner edge for forming a fluid-tight interface surface with the wearer's neck.
An improved protective breathing apparatus having a hood for fitting over the user's head and a neck seal connected at the base of the hood, the neck seal being formed of elastomeric material and having an opening for passage therethrough of the user's head upon stretching of the neck seal, wherein the improvement comprises a coating of parylene on an annular sheet of the elastomeric material forming the neck seal to thereby deter passage through the neck seal of NBC/CBR agents and wherein the opening has a contiguous collar extending from an inner edge of the opening for forming a fluid-tight interface with the user's neck.
An improved emergency personal oxygen system comprising:
- a fire-resistant fabric pouch for containing a vacuum sealable pouch and a protective breathing apparatus;
- a vacuum sealable pouch for containing a protective breathing apparatus;
- and
- a protective breathing apparatus including a hood portion and a neck seal having two opposed surfaces and having a central aperture connected to the hood portion and an transportable oxygen source in fluid contact with the interior of the breathing apparatus;
- wherein the improvement comprises a coating of parylene substantially entirely over at least one of the two opposed surfaces of the neck seal to thereby deter passage through the neck seal of NBC/CBR agents, and where the aperture of the neck seal has extending from the inner edge a contiguous collar.
Dependencies are inferred from the claim text.