Classifying – separating – and assorting solids – Precedent preparation of items or materials to facilitate... – Sorting special items or sorting by methods and apparatus...
Patent
1989-09-15
1990-06-26
Hajec, Donald T.
Classifying, separating, and assorting solids
Precedent preparation of items or materials to facilitate...
Sorting special items or sorting by methods and apparatus...
209552, 209606, 209643, 209906, 222420, 324 714, B07C 504
Patent
active
049364650
ABSTRACT:
A method and apparatus for controlling flows of fluids, suspensions, gases, aerosols, and for sorting individual particles, flowing in transporter ducts of a flow-through duct system, using for control of the flow and hence, for dispensing and sorting processes, a pressure increase for a short time interval, at the entrances of preselected ducts having a value so that the flow of the fluid or gas to be dispensed comes to a stop at these entrances and is thus constrained together with the particle to flow into ducts where the pressure increase does not take place during the same dispensing/sorting phase. The momentary pressure increase is caused at the ducts either by injection of another fluid or gas through the injection duct, corresponding to these ducts, or by generation of a gas bubble or vapor between electrodes situated at the entrance of these ducts. Buffer cavities, situated between the fast fluctuating part of the system and already processed fluid, itself flowing slowly in the drainage tubes, assure very fast, reliable and stable operation for dispenser/sorter system since through the buffering effect, each dispensing flow configuration is independent from previous configurations. The density of the processed suspension is increased during processing inside the system by special filtering/collector cavities of the same kind. The possible uses of the invention include cell sorting in the fields of cytology and cancer research, accurate, environmentally friendly dispensing of any fluid or gas, i.e., in pharmaceutical chemistry, combustion research and the distribution of very dangerous fluids and gases.
REFERENCES:
patent: 3791517 (1974-02-01), Friedman
patent: 4175662 (1979-11-01), Zold
patent: 4237416 (1980-12-01), Zold
patent: 4526276 (1985-07-01), Shoor et al.
patent: 4756427 (1988-07-01), Gohde et al.
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