An improved device for the separation of airborne particles into classes by grain size

A device of improved type for the separation of airborne particles by grain size is described. The principle characteristic of the present invention lies in the fact that it comprises: a first base body in which is formed a first cavity on the edge of which rests a plate on which is deposited a filt...

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Bibliographische Detailangaben
1. Verfasser:	PRODI, VITTORIO
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	APPLICATIONS OF SCANNING-PROBE TECHNIQUES, e.g. SCANNING PROBEMICROSCOPY [SPM] INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS SCANNING-PROBE TECHNIQUES OR APPARATUS TESTING
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Beschreibung
Zusammenfassung:	A device of improved type for the separation of airborne particles by grain size is described. The principle characteristic of the present invention lies in the fact that it comprises: a first base body in which is formed a first cavity on the edge of which rests a plate on which is deposited a filter; two second bodies, one inside the other, in such a way as to define between them an annular channel in which is ducted filtered air and communicating with the said first cavity through a second cylindrical cavity defined by the lower surface of a base wall of the said inner second body and the upper surface of the said filter; and an annular nozzle located in the said channel and operable to eject into it a quantity of particle-bearing air in such a way that the particles of dust present in this are deposited on the said filter.