Chemistry: molecular biology and microbiology – Apparatus – Including measuring or testing
Reexamination Certificate
2000-07-14
2001-07-17
Redding, David A. (Department: 1744)
Chemistry: molecular biology and microbiology
Apparatus
Including measuring or testing
C422S073000, C422S074000, C422S105000
Reexamination Certificate
active
06261833
ABSTRACT:
The object of this utility model is a tube with a scale, intended for tests which analyze milk quality from the perspective of the milk's somatic cell count, for use on farms, milk tankers, in milk processing plants, in sum anywhere milk is handled, which was the aim of the original model, the current aim being to improve its use and effectiveness for tests which analyze somatic cell count in milk, in comparison to known and existing tubes used in these tests.
The test in which the tube in question is used consists of mixing in the tube a sample of milk with a reagent and subsequently inverting this tube, so that this mixture leaks out of the orifice existing in the lid on top of the tube for a certain period of time. When this period of time has elapsed, the amount of mixture remaining in the tube is measured, thereby obtaining the results of the test.
Tubes are already known and used in tests which analyze somatic cell count in milk, said tubes being made of transparent plastic or glass, with a lateral hole in the wall at a certain height to allow air to enter, and an opening in the top of the tube, which is capped with a lid having an orifice in the middle, but which must allow the mixture contained in the tube to drain when the latter is inverted.
Currently used and known tubes have no printed markings on them which directly indicate the results of the test, as these must be examined by measuring the contents remaining in the tube, by placing on the side a separate ruler, which will indicate the data to be analyzed on a suitable table, also separate, which will then indicate the somatic cell count for that milk sample.
Although this type of tube for performing tests which analyze somatic cell count in milk is widely used, these tubes have a number of drawbacks, such as for example the need to transfer the data to a suitable table and use of correlations and conversion factors, examined and measured outside of the tube, which introduces the possibility of error during transfer of the data, and even if this external measurement is done properly, requires a combination of two devices to accomplish its aim (the ruler and the tube).
It was to circumvent these drawbacks—which increase the margin of error of the test for which the tube in question is intended, and which complicate suitable examination of test results—that the tube which is the object of this utility model was developed, said tube having a special scale intended for somatic cell count analysis tests of milk, and said utility model consisting in applying printed graduation marks to the tube which will display the test results directly on the tube, without the need to use external elements, or coordinate and analyze data in a suitable table, since the graduation marks printed on this tube are enough to directly indicate in the remaining contents of the tube the somatic cell count which is the result of the test.
This is enabled because conversion of the data and calculations entered in the external table used were taken into consideration in the positioning of the graduation marks, with regard to the relationship between the measurement of the tube, its volume, the volume of its orifices, the distance between the marks, etc., thereby using analysis of data external to the tube itself.
REFERENCES:
patent: 5700645 (1997-12-01), Pahuski et al.
patent: 6031367 (2000-02-01), Mangan
patent: 0-476850 A1 (1992-03-01), None
Madasa Do Brasil Importacao E Exportacao Ltda.
Redding David A.
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