G - Physics – 01 – N
Patent
G - Physics
01
N
73/103
G01N 1/10 (2006.01) C12M 1/26 (2006.01) G01N 1/00 (2006.01) G01N 35/10 (2006.01) G01N 35/00 (2006.01) G01N 35/04 (2006.01)
Patent
CA 1184785
Abstract Apparatus for taking a sample of liquid from each of a plurality of containers. Blood or similar settling liquids requiring continuous mixing are sampled for subsequent analysis from test tubes closed by rubber or plastic plugs. The test tubes are mounted along the periphery of a rotatable cassette, which is drivingly connected to a motor via gearing, a clutch and a brake, in such a manner, that the cassette rotates in order to maintain the liquids in the test tubes thoroughly mixed and is capable of stopping instantaneously in that the clutch disengages and the cassette is locked in accurate position in front of a sampling needle by means of the brake, which takes place when a signal from an analysis instrument orders an electronic counter to calculate the test tube in question and stop the cassette, and immediately by means of a pneumatic cylinder to lower an arm fixing the test tube in question and by means of a second pneumatic cylinder also to lower the sampling needle and thereby to perforate the closure, the sampling needle being lowered to a definite position and after having arrived at this position effects a signal to the analysis instrument, which sucks a definite liquid amount, draws the sampling needle upward, lifts the arm, disengages the brake, engages the clutch and takes along the cassette, which now again starts rotating.
398771
Borden Ladner Gervais Llp
Coulter International Corp.
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