Capped tubes
First Claim
1. A screw-capped tube for holding a liquid material therein, the tube having an open mouth at one end only which is adapted to be closed by the screw cap with an inner end of the screw cap extending into the open mouth of the tube, an opposing end of the cap to the inner end of the cap being provided with a circular cylindrical recess extending thereinto and whereof the cylindrical wall of the recess is free of splines, an outer circumferential surface of the cap being provided with a spline whereby the cap is adapted to co-operatively engage with a spline of a tool that will fit on to said opposite end of the cap for rotation of the cap by co-operative engagement of the spline of the tool with the spline of the cap.
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Accused Products
Abstract
In a first aspect the present invention provides a screw-capped tube for holding a liquid material therein, the tube having an open mouth at one end only which is adapted to be closed by the screw cap with an inner end of the screw cap extending into the open mouth of the tube, an opposing end of the cap to the inner end of the cap being provided with a circular cylindrical recess extending thereinto and whereof the cylindrical wall of the recess is free of splines, an outer circumferential surface of the cap being provided with a spline whereby the cap is adapted to co-operatively engage with a spline of a tool that will fit on to said opposite end of the cap for rotation of the cap by co-operative engagement of the spline of the tool with the spline of the cap. This arrangement increases versatility and ease in de-capping and re-capping of the tubes. Further aspects also assist with this and/or improve seal efficiency and help to avoid the need for O ring sealing for cryogenic uses and other uses.
132 Citations
29 Claims
- 1. A screw-capped tube for holding a liquid material therein, the tube having an open mouth at one end only which is adapted to be closed by the screw cap with an inner end of the screw cap extending into the open mouth of the tube, an opposing end of the cap to the inner end of the cap being provided with a circular cylindrical recess extending thereinto and whereof the cylindrical wall of the recess is free of splines, an outer circumferential surface of the cap being provided with a spline whereby the cap is adapted to co-operatively engage with a spline of a tool that will fit on to said opposite end of the cap for rotation of the cap by co-operative engagement of the spline of the tool with the spline of the cap.
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6. A screw-capped tube for holding a liquid material therein, the tube having an open mouth at one end only which is adapted to be closed by the screw cap with an inner end of the screw cap extending into the open mouth of the tube, the cap being provided with at least one spline whereby the cap is adapted to co-operatively engage with a spline of a tool that will fit on to said cap for rotation of the cap by co-operative engagement of the spline of the tool with the spline of the cap the tool head having a lifting co-operative engagement feature thereon to co-operatively engage with a complementary co-operative engagement feature on the cap whereby the cap may be held on the tool to be liftable with the tool when the tool head and cap are rotated in a first direction and which disengage, releasing the cap from the tool, when the tool is rotated in the opposing direction.
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19. A screw-capped tube for holding a liquid material therein, the tube having an open mouth at one end only and which is adapted to be closed by the screw cap, wherein at least a part of the cap that engages with the tube is formed of a material that is different from the co-operative engaging part of the tube whereby when the capped tube is subjected to a significantly colder thermal environment the tightness of fit between the cap and the tube is maintained or increased.
- 20. A screw-capped tube for holding a liquid material therein, the tube having an open mouth at one end only and which is adapted to be closed by the screw cap, the screw cap having a plug portion that is adapted to extend into the bore of the tube and which has screw thread formations to engage with corresponding co-operatively engaging screw thread formations in the bore of the tube, the plug portion having a tapering surface that seats against a complementary surface/shoulder at the mouth end of the tube to form a sealing interface between the cap and the tube at or above the top of the threads.
- 22. A screw-capped tube for holding a liquid material therein, the tube having an open mouth at one end only and which is adapted to be closed by the screw cap, the screw cap having a plug portion that is adapted to extend into the bore of the tube and which has screw thread formations to engage with corresponding co-operatively engaging screw thread formations in the bore of the tube, wherein below the cap'"'"'s screw thread formation the plug portion of the cap extends for a distal length which forms a tight interference fit with the bore of the tube in use sealing between the cap and the tube.
Specification