Patent ID: 8221366

Claim:
A bodily fluid drainage system, comprising: a fluid collection chamber formed by a top member connected to a bottom member by a side wall, the collection chamber comprising a first hinge component formed at a fixed position on at least one of the top member and the side wall; an inflow port disposed in the top member and configured for receiving bodily fluid into the collection chamber, the inflow port including a first valve component with which the inflow port may be configured to an open configuration at which fluid flows into the collection chamber through the inflow port and a closed configuration at which fluid is blocked from flowing into the collection chamber through the inflow port; a vent port open to atmospheric pressure disposed in the top member; and a buoyant float member disposed in the collection chamber below the inflow port, the buoyant float member having a hinge arm with a float member chamber disposed at a first end of the hinge arm and a second hinge component located at a second opposing end of the hinge arm, the second hinge component being pivotally connected with the first hinge component of the fluid collection chamber wherein the buoyant float member is configured to be buoyant in bodily fluid, and thereby moves pivotally according to the amount of fluid in the fluid connection chamber, the buoyant float member also having a second valve component located on the float member chamber adjacent the first end of the hinge arm, the second valve component configured to interact with the first valve component of the inflow port such that when the float member chamber moves pivotally downward, the interaction of the second valve component and first valve component place the inflow port in the open configuration, and such that when the float member chamber moves pivotally upward in response to buoyant force of bodily fluid filling the chamber, the interaction of the second valve component and first valve component place the inflow port in the closed configuration when the bodily fluid in the chamber reaches a predetermined level.