(under subclass 420) Subject matter including means located in the discharge from the bowl through which means the discharged material flows and which directly applies a force to the discharged material to move the material away from the bowl.
(1) Note. This subclass includes those devices using an external source of pressure or suction to effect the material movement.
SEE OR SEARCH CLASS
417, Pumps, for pumps, per se.
418, Rotary Expansible Chamber Devices, for rotary expansible chamber pumps, per se.
