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US 4,395,256 AGranted
Centrifuge rotor closure
AssigneeHeraeus-Christ GmbH
InventorGerhard Schroter
Life of this patent
Estimating the term…
Abstract
To provide a vacuum-tight seal to the rotor of a gradient zone separation rotor, the rotor shaft (15) is formed with a circumferential groove (7) which can receive balls (6) located in radial grooves of a cover cap (2), and movable to engage positions with the circumferential groove (7) by an outer holding sleeve (3), or releasable engagement by pulling up on the sleeve (3) against spring pressure.
Claims11
Centrifuge rotor closing structure having
- a rotor stub (15);
- axially extending ducts (11, 12) passing through said rotor stub (15) and terminating at an end portion thereof;
- and a cover cap closing off the end portion of said stub and inhibiting communication between the ends of said axially extending ducts and the ambient surrounding thereof,
- said closure comprising, in accordance with the invention, the combination of
- a plug element (1);
- means (8, 9) sealingly fitting said plug element against the end portion of the stub (15);
- a cover cap fitted over the plug element (1), said cover cap having a depending portion externally surrounding the stub (15);
- radially movable rolling engagement elements (6) located in said depending portion of the plug;
- an axially movable outer sleeve (3) surrounding said depending portion and, selectively, positioning said rolling elements in engagement with the stub (15) when moved to extend over the rolling elements, and releasing said rolling elements from engagement with the stub (15) when moved axially out of engagement with the rolling elements.
6 more elements
Dependencies are inferred from the claim text.