A chemical protective shelter system for encapsulating an uncontaminated person or persons is presented. The chemical protective shelter system has a cover assembly extending a length between a top end and a bottom end and having interior surface and an exterior surface and an opening which can be opened and closed repeatedly while still sealing. The chemical protective shelter system includes a layer of a chemical adsorbent material capable of filtering chemical agents while allowing oxygen and carbon dioxide to pass through the material. The chemical protective shelter is specially adapted to house a plurality of people and facilitate a tent like function. The system also includes a port for auxiliary filtered air. The system may also include a powered air purifying respirator which positively pressures the interior space of the system.

Many people die each year from smoke inhalation due to residential fires. An enclosed space that provides clean and breathable air to people can save many lives when there is a fire and people are unable to escape. The device can be placed in a small and easily accessible space in a dwelling. The device recirculates and purifies air so that people can breathe while they wait for emergency responders.

Many people die each year from smoke inhalation due to residential fires. An enclosed space that provides clean and breathable air to people can save many lives when there is a fire and people are unable to escape. The device can be placed in a small and easily accessible space in a dwelling. The device recirculates and purifies air so that people can breathe while they wait for emergency responders.

A collective NBC filtration system (FIG. 1A) for providing positive-pressure purified air to a plurality of subjects in a protected space, or in an environment which cannot be maintained at positive pressure, in conjunction with one or more facepiece fluidly connected to the NBC filtration system. The system comprises: A casing body [102] including a first section [136] defining an inner volume therein, and a second section [138] adjacent to the first section. The second section includes an inlet port [116], The first section has a larger cross-section than the second section, and forms a peripheral first ledge [142] surrounding the second section. At least one NBC filter accommodated in the inner volume. The at least one NBC filter is supported on the first ledge [142], A lid [104] including a central portion [154] and a second ledge [152] surrounding the central portion. The central portion [154] includes a plurality of outlet ports [118], which are sealable. The lid [104] is openable to provide access to the inner volume and is securely closeable to affix the at least one NBC filter therein the inner volume by the second ledge [152], The lid [104] and the at least one NBC filter define, when the lid is securely closed, an outlet compartment there between. The outlet compartment has about the same cross-section as the second section. A blower [108] housed within the second section. A suction port of the blower being fluidly coupled to the inlet port. The system is configured such that the second section [138] fluidly couples the inlet port [116] to at least one inlet of the respective at least one NBC filter, and, when the lid [104] is securely closed, the outlet compartment [302] fluidly couples at least one outlet of the respective at least one NBC filter to the one or more outlet ports [118] but is otherwise fluidly sealed, thereby preventing potentially contaminated air from entering the outlet compartment, except via the at least one NBC filter.

A collective NBC filtration system (FIG. 1A) for providing positive-pressure purified air to a plurality of subjects in a protected space, or in an environment which cannot be maintained at positive pressure, in conjunction with one or more facepiece fluidly connected to the NBC filtration system. The system comprises: A casing body [102] including a first section [136] defining an inner volume therein, and a second section [138] adjacent to the first section. The second section includes an inlet port [116], The first section has a larger cross-section than the second section, and forms a peripheral first ledge [142] surrounding the second section. At least one NBC filter accommodated in the inner volume. The at least one NBC filter is supported on the first ledge [142], A lid [104] including a central portion [154] and a second ledge [152] surrounding the central portion. The central portion [154] includes a plurality of outlet ports [118], which are sealable. The lid [104] is openable to provide access to the inner volume and is securely closeable to affix the at least one NBC filter therein the inner volume by the second ledge [152], The lid [104] and the at least one NBC filter define, when the lid is securely closed, an outlet compartment there between. The outlet compartment has about the same cross-section as the second section. A blower [108] housed within the second section. A suction port of the blower being fluidly coupled to the inlet port. The system is configured such that the second section [138] fluidly couples the inlet port [116] to at least one inlet of the respective at least one NBC filter, and, when the lid [104] is securely closed, the outlet compartment [302] fluidly couples at least one outlet of the respective at least one NBC filter to the one or more outlet ports [118] but is otherwise fluidly sealed, thereby preventing potentially contaminated air from entering the outlet compartment, except via the at least one NBC filter.

An emergency elevator includes a door frame installed on upper, left and right sides of an entrance of an elevator platform, an elevator car configured to vertically move along an elevator passage and provided with a pair of elevator doors, a pair of platform doors installed in the door frame, a lower frame installed on a lower side of the entrance of the elevator platform and configured to slidably support the platform doors, an upper door rim installed on an upper side of the platform doors, a side door rim vertically installed at a lateral end of the platform doors, an oxygen supply device configured to supply oxygen to a patient in the elevator car, an emergency ventilation device configured to supply a purified air into the elevator car, and a filter device provided in the blowing duct so as to remove harmful substances introduced into the elevator car.

An apparatus for controlling a level of gas in a closed environment from a gas supply having a gas sensor for detecting the level of gas in the closed environment. The apparatus has a valve in communication with the gas supply which is automatically opened without human interaction, monitoring and adjustment to release gas from the gas supply into the environment when the level of gas in the environment goes below a first predetermined level and which is automatically closed without human interaction, monitoring and adjustment to stop gas from being released from the gas supply into the environment when the level of gas in the environment goes above a second predetermined level. A method for controlling a level of gas in a closed environment from a gas supply. A refuge chamber.

A floor-space saving NBC filtration system for collective protection shelters with NBC filter unit and means for changing the NBC filtration system state between a ventilation mode, effective during normal times or conventional hazard, and a NBC protection mode, effective during NBC hazard. The NBC filtration system is contained in a space out of a comfortable reach of the shelter occupants thus saving usable floor-space. The means for changing the NBC filtration system state is operated from a location within the comfortable reach of the shelter occupants. The NBC filter unit inlet and outlet are located at close proximity to each other, a pre-filter outlet is located in proximity to the NBC filter unit inlet and outlet with a changeover valve, serving as means for changing the NBC filtration system state, located there between. Resulting in simple operation and space saving by the changeover valve replacing prior art space consuming flexible pipes.

A floor-space saving NBC filtration system for collective protection shelters with NBC filter unit and means for changing the NBC filtration system state between a ventilation mode, effective during normal times or conventional hazard, and a NBC protection mode, effective during NBC hazard. The NBC filtration system is contained in a space out of a comfortable reach of the shelter occupants thus saving usable floor-space. The means for changing the NBC filtration system state is operated from a location within the comfortable reach of the shelter occupants. The NBC filter unit inlet and outlet are located at close proximity to each other, a pre-filter outlet is located in proximity to the NBC filter unit inlet and outlet with a changeover valve, serving as means for changing the NBC filtration system state, located there between. Resulting in simple operation and space saving by the changeover valve replacing prior art space consuming flexible pipes.

An apparatus for controlling a level of oxygen in a closed environment from an oxygen supply having an oxygen sensor for detecting the level of oxygen in the closed environment. The apparatus has a plurality of relays in communication with the sensor. The apparatus has a valve in communication with the relays and the oxygen supply which is automatically opened with the relays without human interaction, monitoring and adjustment to release oxygen from the oxygen supply into the environment when the level of oxygen in the environment goes below a first predetermined level and which is automatically closed with the relays without human interaction, monitoring and adjustment to stop oxygen from being released from the oxygen supply into the environment when the level of oxygen in the environment goes above a second predetermined level. A method for controlling a level of oxygen in a closed environment from an oxygen supply. A refuge chamber.