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US 4,396,381 AGranted
Closure device for specimen-containers such as test tubes
AssigneeHoffmann-La Roche Inc.
InventorsPeter Fanger, Rolf Naff, Theodor Schmidhauser
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AssigneeHoffmann-La Roche Inc.
InventorsPeter Fanger, Rolf Naff, Theodor Schmidhauser
Estimating the term…
A closure device for a test tube to be used with an ultra-centrifuge comprising an insertion member, the insertion member including a bottom section which is adopted to be inserted into the test tube and has an outer diameter substantially equal to the inner diameter of the test tube and an upper section which extends upwardly from the test tube and has an outer diameter greater than the inner diameter of the said test tube, an abutment positioned outside of the test tube about the upper edge thereof, said abutment being adopted under the influence of centrifugal force to press against the outer surface of the upper edge of the test tube.
A closure device for a test tube to be used with an ultra-centrifuge comprising an insertion member, the insertion member including a bottom section which is adopted to be inserted into the test tube and has an outer diameter substantially equal to the inner diameter of the test tube and a one-piece, nonthreaded upper section which extends upwardly from the test tube and has an outer diameter greater than the inner diameter of the said test tube, an abutment positioned outside of the test tube about the upper edge thereof, said abutment being adopted under the influence of centrifugal force to press against the outer surface of the upper edge of the test tube.
Dependencies are inferred from the claim text.