The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 01, 1979
Filed:
Jul. 01, 1977
William D Cornell, Ballwin, MO (US);
Sherwood Medical Industries Inc., St. Louis, MO (US);
Abstract
A fluid collection device for receiving a liquid, such as blood, and which is adapted to be centrifuged to separate it into its relatively light and heavy phases. The collection device has a phase partitioning device having a specific gravity intermediate those of the light and heavy phases of the blood so that it automatically moves during centrifugation to substantially the interface of the phases to sealingly partition them from each other. The device has a resilient sealing member which is of conical or 'umbrella' configuration, and another member of different specific gravity connected to the sealing member and having stabilizing members for maintaining the sealing member properly oriented in the container. The sealing member partially collapses during centrifugation to allow blood components to pass by the sealing member. As the phases become separated and the centrifugal forces decrease, the sealing member expands radially outwardly and sealingly engages the walls of the container providing a barrier between the light and heavy phases upon complete phase separation.