Air movement apparatus

An air movement apparatus

• comprising a curved body about which air can circulate, the curved body having a rim and a central passage way and, in use, having a lower pressure surface on the one side of the rim, and a higher pressure surface on the other side of the rim, an air outlet to blow air over the lower pressure surface, an air inlet to suck air in from the higher pressure surface, and air acceleration means to move air from the air inlet to the air outlet.
• a first barrier member positioned adjacent the said one end of the central passageway, the barrier member having a peripheral edge spaced from the body to define the annular opening of the air outlet wherein an first barrier member is slidably attached to a shaft, and the curved body surrounded by a housing.

An air movement apparatus comprising a curved body about which air can circulate, the curved body having a rim and a central passageway and, in use, having a lower pressure surface on one side of the rim, and a higher pressure surface on the other side of the rim, an air outlet to blow air over the lower pressure surface, an air inlet to suck air in from the higher pressure surface, and air acceleration means to move air from the air inlet to the air outlet;

• including a first barrier member positioned adjacent one end of the central passageway, the barrier member having a peripheral edge spaced from the body to define the annular opening of the air outlet, the peripheral edge spaced inwardly of the curved body high point.