Liquid purification or separation – Gravitational separator – Portable invertible – e.g. – milk and cream separator
Patent
1981-02-04
1982-04-27
Castel, Benoit
Liquid purification or separation
Gravitational separator
Portable invertible, e.g., milk and cream separator
210516, 210927, 128218P, 422 44, B01D 2126
Patent
active
043269591
ABSTRACT:
A serum and cell separating and dispensing device comprising an elongated tubular vessel partitioned throughout its length forming two distinct compartments containing vent orifices on either side. One open end of the vessel is fitted with a resilient element containing a larger and smaller orifice respectively. These orifices communicate with the two compartments respectively. At the opposite end of the vessel are two small tubular vessels extending from and communicating with the compartments formed by the partition. Blood drawn in an evacuated collection tube such as Becton Dickinson's vacutainer is centrifuged after clotting. The device is forced into the open end of the collection tube and pressed downwardly. The resilient element forms an air trap by touching the inner wall of the collection tube and serum is forced through the orifice communicating with the serum compartment. The tubular vessel is turned slightly while the resilient element remains stationary and by so doing, the orifice communicating with the cellular compartment is open while the orifice of the serum compartment is closed. One may then tilt the entire assembly in one direction allowing drops of serum to be dispensed, whereas turning or tiping in the opposite direction allows one to dispense cells in a dropwise manner.
REFERENCES:
patent: 3355098 (1967-11-01), Farr
patent: 3512940 (1970-05-01), Shapiro
patent: 3837376 (1974-09-01), Brown et al.
patent: 4057499 (1977-11-01), Buono
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