Capping assembly for thin all centrifuge tubes

Details Capping assembly for thin all centrifuge tubes Capping assembly for thin all centrifuge tubes

1975-03-13

1976-02-17

Krizmanich, George H.

Chemistry: physical processes

233 1A, 150 8, 128214D, B04B 1500

Patent

active

039387356

ABSTRACT:
A centrifuge test tube cap assembly for a thin flexible test tube including a stem member having a stud adapted to extend out the mouth of the test tube and having a cylindrically shaped skirt dimensioned to fit snugly within the inner surface of the mouth of the test tube, the stem member also having a slanting annular surface between the skirt and the stud, slanting outwardly in the downward direction, and the assembly also including a crown member having a depending outer lip, the outer diameter of which is substantially the same as the outer diameter of the thin flexible tube and having an annular inner surface slanting outwardly in the downward direction, the slanting surface of the lip conforming to the shape and slant of the slanting annular surface of the stem member so that when the crown is positioned over the stem and tightened axially on the stem member the upper edge of the flexible tube is deformed inwardly to squeeze the upper edge of the tube between the respective slanting surfaces of the stem member and the crown member to effect a fluid-tight seal.

REFERENCES:
patent: 3071316 (1963-01-01), Piemonte et al.
patent: 3195932 (1965-07-01), Morton
patent: 3285308 (1966-11-01), Stambaugh
patent: 3366320 (1968-01-01), Cho
patent: 3434615 (1969-03-01), Barletta
patent: 3459369 (1969-08-01), Marks

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