Patent ID: 7501059
Filing Date: 2009-03-10
Classification: A61M

Abstract:
1. An open circuit fluid filtration system including: a) a filtration device, said filtration device having a filter media dividing said filtration device into an upstream side and a downstream side, b) a storage container for holding filtered fluid, c) a second conduit connected between the downstream side of said filtration device and said storage container, d) a second vent line in fluid communication with the atmosphere and connected directly to the downstream side of said filtration device, e) a flexible fluid container, f) a first conduit in fluid communication with said flexible fluid container, g) a first vent line in fluid communication with said first conduit and having an outlet open to atmosphere at a sufficient height so that a fluid being filtered does not exit out of the first vent line, and having a U-shaped portion which prevents gas entry into said fluid filtration system until a desired amount of fluid has exited said flexible fluid container, h) an upstream gas inlet housing in fluid communication with said first vent line, and i) a downstream gas inlet housing in fluid communication with said second vent line, said upstream gas inlet housing and said downstream gas inlet housing contained in a single inlet device.