(under subclass 23) Apparatus wherein the fluid introduced is air which is at either the pressure normal to the region in which the separator is located or a pressure which is elevated from that pressure.
(1) Note. See (3) Note of subclass 23 above.
(2) Note. Included in this subclass is a body of art which is concerned with counteracting the derogatory effect on the separating process caused by the movement of air within a housing provided for the bowl, which movement is created most frequently by the friction developed between the rotating bowl and the air surrounding it. The means making this particular art proper for this subclass usually comprises an inlet for admitting outside air to the housing, which latter air is utilized to at least partially overcome the undesired results (e.g., intermingling, or loss, of liquids which have been separated) of the movement of the air already in the housing.
(3) Note. As a sidelight to (2) Note., it can be observed that an aperture for admitting air, if located in a lower region of the housing, may serve also as an outlet for unwanted substances (e.g., liquids, foreign particles) which otherwise would accumulate there.
SEE OR SEARCH THIS CLASS, SUBCLASS:
60+, especially subclasses 60 and 63 for a separator which includes an exterior housing for the rotatable bowl, which subclasses include a collection of art that is concerned with the movement of only that air which already is in housing, as contrasted with the situation discussed in (2) Note above.
