Container closure
AssigneeFisons Limited
InventorDavid Broad
Life of this patent
Estimating the term…
Abstract
The cap of a centrifuge sample tube has a larger than usual bore therethrough to facilitate sample loading and unloading. Sealing of the larger bored is better than seals which can be achieved with the very narrow bores hitherto considered essential to minimize potential sources of leakage of sample from the tube.
Claims5
A closure cap having an aperture therethrough and adapted to be mounted in sealing engagement upon the open end of a tubular container, said closure cap comprising an outer member having a dependant annular skirt;
- a dependant central portion which together with the skirt defines an annular recess adapted to receive the open end of the container, the central portion having a substantially central longitudinal bore therethrough;
- a transverse member mounted substantially co-axially within the outer member and having a longitudinal stem located within the bore in the central portion and axially movable relative to the central portion;
- the longitudinal stem having a longitudinal bore therethrough which is the aperture of the closure cap, and wherein the aperture has a narrower diameter portion thereof extending for from 5 to 25% of the length of the aperture.
A closure cap having an aperture therethrough and adapted to be mounted in sealing engagement upon the open end of a tubular container, said closure cap comprising a closure member adapted to be mounted within the aperture and a sealing member adapted to be engaged by the closure member within the aperture, and wherein the aperture includes a narrower diameter portion and the closure member is provided with a narrower diameter portion adapted to engage with the narrower portion of the aperture.
In a closure cap for use in the closure of centrifuge tubular containers, said closure cap having an aperture therethrough with a narrow diameter portion of less than about 5 mms, the improvement comprising:
- said aperture including a larger diameter portion extending upwardly from a junction with the narrow diameter portion;
- a sealing member adapted to be inserted within said aperture and located at said junction;
- and
- a closure member adapted to be insertably mounted within said aperture in sealing engagement with said sealing member at said junction for reliably sealing said aperture.
Dependencies are inferred from the claim text.