Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
September 7, 2010
Patent Application Number
12053241
Date Filed
March 21, 2008
Patent Citations Received
Patent Primary Examiner
Patent abstract
A filter vial and piston are provided where the vial has a cylindrical wall with a closed bottom and open top and with the hollow, tubular piston therein. The piston has a distal end covered by a cup having a proximal cup seal extending outward to engage the walls of the vial to form a fluid tight seal with the vial during use. The distal end of the piston has a piston flange extending outwardly and located adjacent a recess in the piston so the cup forms a snap fit over the piston flange and extends into the recess. The piston flange causes the cup to bulge sufficiently outward to form a fluid tight seal with the vial during use. A filter is placed in the bottom of the cup.
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