Patent ID: 7704388
Filing Date: 2010-04-27
Classification: B01D,G01N,Y10T

Abstract:
1. A reusable chromatographic device comprising: a one-piece reusable plastic tubular body comprising a first open end having an inside diameter ID a one-piece reusable plastic sealing insert comprising a circular base having a perimeter portion; said sealing insert further comprising substantially planar top and bottom surfaces; said sealing insert further comprising a stem extending upward from said base; said stem comprises first and second annular stairs, and an inlet port; said first annular stair has an outside diameter OD a one-piece reusable plastic cap comprising a top wall, a central opening disposed in said top wall, and an annular sidewall having internal threads removably engaged with said external threads of said tubular body; said inlet port of said stem passes thru said central opening and extends outward of said top wall of said cap; said central opening has an inside diameter ID rotation of said cap causes said top wall of said cap to apply a straight downward force upon said upper annular end and said first annular stair of said stem, respectively, of said sealing insert; and said rotation of said cap further causes said annular sloped surface of said sealing insert to form a seal with said tapered rim of said first open end of said tubular body.