Apparatus for the percutaneous absorption of fluids

Claim 1

An orifice assembly comprising first and second holder members, each of said holder members having means defining a centrally disposed orifice, an exterior planar surface including a sealing means, and an annular interior planar surface parallel to each of said respective exterior planar surfaces and adjacent to and concentric with each said respective orifice, said interior planar surfaces being positioned and arranged to receive and retain a flexible membrane therebetween, said interior and exterior planar surface being on opposite sides of each of said first and second holder members, said first holder member having a continuous annular projection disposed adjacent to and concentric with the interior planar surface of said first holder member, said projection extending outwardly from said interior planar surface of said first holder member and including a first outer peripheral surface normal to said exterior planar surface of said first holder member including a gasket means and a first inner sloping surface, said second holder member having a continuous annular groove disposed adjacent to and concentric with the interior planar surface of said second holder member, said groove being recessed from the interior planar surface of said second holder member and including a second outer peripheral surface normal to the exterior planar surface of said second holder member and positioned and arranged to seal against said gasket means and to securely fasten together said first and second holder members and a second inner sloping surface corresponding to said first inner sloping surface, both of said orifice having the same diameter and aligned to be co-extensive when said groove and said projection are positioned and arranged in a mating relationship.