Patent ID: 8211384
Filing Date: 2012-07-03
Classification: A61J,B01D,B01L,B23P,Y10T

Abstract:
1. A filter vial kit, comprising: a tubular vial having longitudinal axis, a closed bottom, an open top and a cylindrical interior wall with a diameter D joining the bottom; a tubular piston with opposing distal and proximal ends with at least the distal end being open, the piston having a cylindrical wall with an exterior facing side of that wall having a recessed portion adjacent the distal end the piston, the piston further having a distal piston flange at or adjacent to the distal end of the piston and extending outward from the piston; a filter support at the distal end of the piston; a retainer cup having a bottom and continuous sidewall around the bottom with the sidewall extending between a proximal and distal end of the cup, the cup sidewall having an interior diameter smaller than the distal piston flange, the cup further having a cup seal extending outward from the proximal end of the cup a distance greater than the diameter D, the sidewall of the cup being sufficiently flexible to deform outward as the cup passes over the distal piston flange so the sidewall can have an outer dimension larger than diameter D at the location of the piston flange when the retainer cup passes over the distal piston flange; and a filter that is configured to fit between and be held between the retaining cup and the distal end of the piston when the proximal end of the retainer cup is placed over the distal end of the piston.