Liquid purification or separation – Gravitational separator – Portable invertible – e.g. – milk and cream separator
Patent
1982-03-22
1984-01-10
Weinstein, Steven L.
Liquid purification or separation
Gravitational separator
Portable invertible, e.g., milk and cream separator
210789, 210927, 422101, B01D 1700, B01D 2126
Patent
active
044252358
ABSTRACT:
A blood collection device for collecting and separating whole blood into its relatively low and high density phases includes a collection container, and a housing having an enlongate passageway in the housing. Gel-like material having a specific gravity intermediate the specific gravities of the separated high and low density phases is disposed in the passageway. A piston having a specific gravity greater than that of the gel-like material is disposed in the passageway and sized to allow gel-like material to flow past it at a low flow rate and to retard the movement of the piston during centrifugation of the device. Means for preventing the flow of the gel-like material from the housing and toward the interface of the phases until the piston has moved out of the passageway is provided.
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Cornell William D.
Joslin Joel
Garber Stanley N.
O'Meara William R.
Sherwood Medical Company
Upchurch Gregory E.
Weinstein Steven L.
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