Patent ID: 7914490

Claim:
An ambulatory infusion pump assembly for supplying a liquid drug and for preventing the unintended ingress and egress of liquid between an environment external to the assembly and an enclosed internal cavity of the assembly, comprising: a housing having a cover and a base, the cover and the base connect together in a closed orientation of the housing to define the enclosed internal cavity, and the cover and the base separate from one another in an open orientation of the housing to expose the internal cavity to the external environment; the internal cavity adapted to receive therein a container of the liquid drug to be supplied; a tube extending from the internal cavity through the housing to the external environment; an infusion pump within said internal cavity in fluid communication with the container and the tube within the internal cavity, the infusion pump operative to move the liquid drug from the container through the tube out of the housing; a seal sandwiched between said cover and said base, said seal preventing fluid flow between the cover and the base when the housing is in the closed orientation; and a hydrophobic vent in said housing, said hydrophobic vent equalizing gas pressure between said cavity and said environment and inhibiting the passage of liquid between said cavity and said environment.