Measuring and testing – Sampler – sample handling – etc. – Flow divider – deflector – or interceptor
Patent
1982-12-27
1985-04-23
Levy, Stewart J.
Measuring and testing
Sampler, sample handling, etc.
Flow divider, deflector, or interceptor
7386491, 7386321, 422 72, 422102, 494 16, G01N 3700, G01N 128
Patent
active
045122024
ABSTRACT:
A thick walled centrifuge tube with a generally constant internal diameter and having at least one circumferential groove within the exterior surface of the tube. The groove is designed to have a depth slightly less than the wall thickness of the tube. The circumferential groove is designed to assist in slicing of the tube subsequent to centrifugation in order to isolate different separated particles of a fluid sample which have formed fraction bands at certain levels in the tube. The groove reduces the cutting force required to partition the tube. The groove provides a guide for a slicing blade. The groove is formed in such a manner that a fluid tight seal is formed between the slicing blade and the tube as the blade proceeds through the tube. The centrifuge tube wall at the base of the groove, after slicing, is resilient enough to allow the tube sections to be rejoined under force and create a fluid tight seal.
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patent: 4372483 (1983-02-01), Wright
Wedemeyer Robert C.
Wright Herschel E.
Beckman Instruments Inc.
Harder P. R.
Levy Stewart J.
May W. H.
Noland Tom
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