Method and apparatus for separating serum or plasma from the for

Details Method and apparatus for separating serum or plasma from the for Method and apparatus for separating serum or plasma from the for

1977-05-03

1980-02-19

Spitzer, Robert H.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Check valve

210359, 210518, 210DIG23, B01D 3300

Patent

active

041893859

ABSTRACT:
A separator tube for insertion into a collection tube comprises a tubular member having one end closed by a plug. The plug comprises a valve seating portion having a valve opening therein and a valve head adapted to seat on the seating portion and bias means extending between the seating portion and the valve head to bias the head to the seated position on the seating portion when the separator tube is stationary within the collection tube.

REFERENCES:
patent: 2912999 (1959-11-01), Kersh
patent: 3233610 (1966-02-01), Wade
patent: 3263700 (1966-08-01), Toland
patent: 3741400 (1973-06-01), Dick
patent: 3799342 (1974-03-01), Greenspan
patent: 3800947 (1974-04-01), Smith
patent: 3865731 (1975-02-01), Seitz
patent: 3932277 (1976-01-01), McDermott et al.
patent: 3954614 (1976-05-01), Wright
patent: 3962085 (1976-06-01), Liston et al.
patent: 3969250 (1976-07-01), Farr

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