Surgery – Respiratory method or device – Including body or head supported means covering user's scalp
Patent
1978-07-14
1980-06-17
Recla, Henry J.
Surgery
Respiratory method or device
Including body or head supported means covering user's scalp
12820125, A62B 1704
Patent
active
042078830
ABSTRACT:
An environmental control hood assembly includes a headpiece and a noise filter subassembly which is disposed within the headpiece adjacent its top wall. The filter subassembly includes a silencer member with an air-permeable wall portion and is connected to the conduit which in turn is connected to the source of air under pressure. The silencer member in turn is disposed within a foam member which is fabricated of an air-permeable synthetic resin open cell foam so that air introduced into the silencer member must travel a path through the silencer member and through the foam with resultant reduction in the sound level of that air. A barrier may be provided under the silencer to preclude direct flow of air from the silencer downwardly through the foam, and the filter subassembly may include a bottom sheet of an air-pervious material.
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Nuclear & Environmental Protection, Inc.
Recla Henry J.
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