摘要:
Method and design of a pressure vessel having an internal supportive structure that reduces pressure forces applied to the external shell of the vessel by distributing such forces via internal bonds mostly connected to a central supporting element. The method and design allow making much lighter and stronger pressure vessels and containers using additive manufacturing technology, known as 3D printing.
摘要:
An apparatus (10) is provided for hypoxic training or therapy. The apparatus provides a user air having a lower oxygen content than the ambient atmosphere. The apparatus reduces the oxygen content of the air by passing the ambient air through a membrane separator (14) which extracts the oxygen therefrom by a vacuum pump (15) attached to the permeate outlet of the separator. Alternatively, the oxygen content can be reduced by adsorption of oxygen from the ambient air or by adding a low oxygen gas to air taken from the environment. This low oxygen gas may be stored nitrogen or stored gas which is low in oxygen, or it may be derived from the exhaled air from the user. If the exhaled air from the user is used, carbon dioxide and water are extracted by a membrane separator or by physical or chemical process which adsorbs carbon dioxide from the gas.
摘要:
Fire prevention and suppression systems and breathable fire-extinguishing compositions are provided for rooms, houses and buildings, transportation tunnels and vehicles, underground and underwater facilities, marine vessels, submarines, passenger and military aircraft, space stations and vehicles, military installations and vehicles, and all other human occupied objects and facilities. The system provides a breathable hypoxic fire-preventative atmosphere at standard atmospheric or local ambient pressure. The system employs an oxygen-extraction apparatus supplying oxygen-depleted air inside a human-occupied area or storing it in a high-pressure container for use in case of fire. A breathable fire-extinguishing composition is introduced for constant fire-preventive environments, being mostly a mixture of nitrogen and oxygen and having oxygen content ranging from 12 % to 17 %. A fire-suppression system is provided employing a fire-extinguishing composition with oxygen concentration under 16 %, so when released it creates a breathable fire-suppressive atmosphere having oxygen concentration from 10 % to 16 % with possible addition of carbon dioxide. A technology for automatically maintaining a breathable fire-preventive composition on board a human-occupied hermetic object is provided by introducing inert ballast that automatically maintains oxygen content under the Hypoxic Threshold. An aircraft fire suppression system utilizing a hypoxic fire suppression agent is provided for producing breathable atmosphere onboard having fire-extinguishing properties.
摘要:
Method and design of a pressure vessel having an internal supportive structure that reduces pressure forces applied to the external shell of the vessel by distributing such forces via internal bonds mostly connected to a central supporting element. The method and design allow making much lighter and stronger pressure vessels and containers using additive manufacturing technology, known as 3D printing.