Liquid purification or separation – Gravitational separator – Portable invertible – e.g. – milk and cream separator
Patent
1976-01-16
1978-05-09
Cuchlinski, Jr., William A.
Liquid purification or separation
Gravitational separator
Portable invertible, e.g., milk and cream separator
232585R, 210DIG23, B01D 2126
Patent
active
040885828
ABSTRACT:
A blood collection device includes a tube for receiving a sample of whole blood for centrifugal separation into the lighter phase, plasma or serum, and the heavier cellular phase. The tube has a needle-pierceable stopper at the opposite end for maintaining a negative pressure in the tube. A blood phase partitioning device is disposed within the tube and includes upper and lower members with the upper member having a greater specific gravity greater than that of the lower member but together having a specific gravity between that of the lighter phase and that of the heavier phase. A sealant is disposed between the members and in contact with each member and has a specific gravity equal to the average of the two members. During centrifugation of the blood, the partitioning device automatically moves to the interface of the two phases, and the members move toward each other forcing the sealant radially outwardly from between the members and against the inner wall of the tube to provide a permanent partition between the two separated phases.
REFERENCES:
patent: 3780935 (1973-12-01), Lukacs et al.
patent: 3852194 (1974-12-01), Zine, Jr.
patent: 3909419 (1975-09-01), Ayres
patent: 3957654 (1976-05-01), Ayres
patent: 4021340 (1977-05-01), Zine, Jr.
Murty Vabilisetti S.
Schuler Thomas C.
Cuchlinski Jr. William A.
Garber S. N.
O'Meara W. R.
Sherwood Medical Industries Inc.
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