Personal air filtering and delivery systems

A personal air delivery system for delivery of breathable air to a user whose nose and mouth are uncovered and thereby directly open to ambient air, comprising:

• a pair of air supply tubes each having an air discharge end;
• means worn on a user's head for supporting the air supply tubes on opposite sides of a user's head with their air discharge ends located adjacent opposite sides of a user's nose and mouth and directed generally toward one another so that air discharged from the air discharge ends of the tubes displaces the ambient air in the area of the user's nose and mouth so that the user breathes air discharged from the discharge ends of the tubes;
• and
• means connecting the air supply tubes to a source of pressurized breathable air.

An area air delivery system for delivery of breathable air to an area occupiable by a user who can enter and leave the area, comprising:

• a canopy formed by porous fabric material for at least partially surrounding the area to which air is to be supplied and defining the area which a user can enter and leave;
• an air supply tube having a discharge end positioned in the canopy;
• and
• means connecting the air supply tube to a source of pressurized breathable air whereby breathable air is supplied to and fills the area.