Protection system against the penetration of contaminated...

Gas separation – Combined or convertible – In environmental air enclosure

Reexamination Certificate

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Details

C055S467000, C055S417000, C055S469000, C055S486000, C055S505000, C096S422000, C109S00100R

Reexamination Certificate

active

06328775

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a novel filtration system. More particularly, the invention concerns a filtration system for preventing the penetration of contaminated air, including nuclear, biological or chemical (NBC)-contaminated air, into a bomb shelter or any other closed space.
BACKGROUND OF THE INVENTION
For protection against attacks by non-conventional weapons such as NBC, there is the sealed room, which replaces the ventilated bomb shelter. Both the sealed room and the bomb shelter present disadvantages. In a sealed room, difficulties are encountered in obtaining tightly sealed doors and windows in order to prevent the penetration of contaminated air. A main disadvantage of bomb shelters is that their ventilation and filtration systems require too much space, are generally fixed in one location, and cannot be easily and quickly relocated.
DISCLOSURE OF THE INVENTION
In view of the above problems, there has long been felt a need for a new air filtration system which can be easily dismantled when not in use and reassembled in a short time when required.
It is therefore an object of the present invention to provide a compact and portable filtration system for protection against contaminated air, including NBC-contaminated air.
It is yet another object of the present invention to provide an air filtration system for protection against NBC-contaminated air that is relatively inexpensive. In accordance with the present invention, there is therefore provided a compact, portable system for protection against the penetration of contaminated air into a protected space, said system comprising a gas filter; an air-intake unit; a blower for sucking air through the filter into the protected space; an air exhaust unit provided with an over-pressure valve and means for actuating the blower, wherein at least the filter, the blower and the means for actuating the blower can be removed, stored and reassembled by the user.
The system of the present invention is easily mountable, easily removable, easily stored, and all of its storable components have a maximum total weight of less than 20 kg, for a six-person protected space.


REFERENCES:
patent: 2014840 (1935-09-01), Geiger et al.
patent: 3075448 (1963-01-01), Cohen
patent: 4631872 (1986-12-01), Daroga
patent: 4707953 (1987-11-01), Anderson et al.
patent: 5115613 (1992-05-01), McCarthy

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