Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition
Patent
1979-09-12
1981-07-21
Smith, William F.
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
422 77, 422101, 1282721, 233 26, 210516, 210927, C01G 2300, C01G 900, B04B 912
Patent
active
042798639
ABSTRACT:
An apparatus (10,50) is provided for physically retaining a reagent (17) in a blood collection tube (11) separate from a blood sample until the tube (11) is centrifuged. The apparatus includes a cup-shaped flexible barrier (10,50) placed over the reagent (17) disposed in the bottom of the tube (11). The barrier (10,50) seals with the inner wall of the tube (11) and prevents the reagent (17) from entering the tube's upper evacuated chamber (12,55) into which the blood sample is drawn. The seal maintains the barrier (10,50) in position until the tube (11) is centrifuged whereupon the barrier (10,50) moves to the bottom of the tube (11) causing the reagent (17) to flow past the barrier (10,50) to mix with the blood sample.
REFERENCES:
patent: 3481477 (1969-12-01), Farr
patent: 3780935 (1973-12-01), Lukacs
patent: 3782548 (1974-01-01), Bowen
patent: 3894952 (1975-07-01), Ayres
patent: 3901219 (1975-08-01), Kay
patent: 3920549 (1975-11-01), Gigliello
patent: 3920557 (1975-11-01), Ayres
patent: 3931010 (1976-01-01), Ayres et al.
patent: 4147628 (1979-04-01), Bennett et al.
Konkol Chris
Sherwood Medical Industries Inc.
Smith William F.
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