Patent ID: 11938351
Assignee: BETH-EL ZIKHRON YAAQOV INDUSTRIES LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC A  B | IPC A  B

Claim 0:
1. An NBC filtration system configured to provide positive-pressure, purified air to one or more sealable outlet ports, the system comprising:
a casing body comprising a first section defining an inner volume therein, and a second section adjacent to the first section, the second section comprising an inlet port; the first section having a larger cross-section than the second section, and forming a peripheral first ledge projecting inwardly from sidewalls of the first section surrounding the second section and connecting the first section and the second section;
at least one NBC filter accommodated in the inner volume, the at least one NBC filter being supported on the first ledge;
a lid comprising a projecting central portion, sidewalls and a second ledge surrounding the central portion, the central portion comprising one or more outlet ports, which are sealable, the lid being openable to provide access to the inner volume and being securely closeable to affix the at least one NBC filter therein the inner volume by the second ledge; the lid and the at least one NBC filter defining, when the lid is securely closed, an outlet compartment there between, the outlet compartment having about the same cross-section as the second section;
a first seal configured for fluid sealing of the outlet compartment;
a second seal configured for fluid sealing of the second section; and
a blower housed within the second section, a suction port of the blower being fluidly coupled to the inlet port;
wherein the system is configured such that the second section fluidly couples the inlet port to at least one inlet of the respective at least one NBC filter, and, when the lid is securely closed, the outlet compartment fluidly couples at least one outlet of the at least one NBC filter to the respective one or more outlet ports; and
wherein sidewalls of the casing body and sidewalls of the NBC filter define a space between the first seal and the second seal that is ventilated to the atmosphere, the system being thereby configured to continue to provide pressurized purified air also when one of the seals has been compromised.