Patent ID: 6234762
Filing Date: 2001-05-22
Classification: F04F,Y10T

Abstract:
A pump for pumping liquids into, or out of, a container, including:a body;means to sealably engage the body with an inlet hole of the container;a liquid passage in the body operably connectable to the interior of the container and to the exterior of the body;an air passage through the body operably connectable to the interior of the container;a venturi element in the air passage having a plurality of air ports operable to generate a vortex in the air passage; andcompressed air passage means to connect the air ports to a source of compressed air;the venturi element is movably mounted in the air passage to selectively reverse the air flow through the air passage to either evacuate or pressurize the container, to pump the liquid into, or out of, the container.