Abstract: An orifice assembly for use in connection with diffusion cells for the percutaneous absorption of fluids which is composed of a pair of resiliant and mating members having structure for securely retaining a flexible membrane therebetween in a predetermined and fluid tight relationship with each other and the diffusion cells.

Abstract: A venting closure (10) for containers (12) having a pour opening (14) defined by a circumferential rim (16) includes a top wall (20) having inner (22) and outer (24) surfaces. A side skirt (26) extends from the top wall (20) about the inner surface (22). A liner (28) is mounted adjacent the inner surface (22) for perfecting a seal between the top wall (20) and the circumferential rim (16) when the closure (10) is secured upon the rim (16) and over the opening (14). The liner (28) includes a gas impermeable non-hydrophobic portion (30) at least about the periphery of the liner (28) and an integral gas permeable hydrophobic portion (32) offset therefrom.

Abstract: A canister filter assembly (10) for use in a vacuum line for trapping particulates and liquids from fluid drawn through the vacuum line including a cupped shaped container portion (12) and a lid portion (14) disposed over the container (12) in sealing engagement therewith. The lid (14) includes a fluid inlet (28) and a fluid outlet (30). A filter assembly (16) including a hydrophobic filter (32) and a prefilter (34) filters the particles and aerosols from the fluids passing through the fluid outlet (30). A filter support (18) supports the filters (32, 34, 36) within the filter assembly (16) and includes a cap member (40) spaced below the prefilter (34). The cap member (40) includes an upwardly extending peripheral rim (42) perfecting a seal with the remainder of the filter support (18).