(under subclass 526) Dispensers having a flow controller or closure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
507, for annular, outlet surrounding actuators movable (usually by axial rotation or oscillation) relative to some other movable outlet element operated thereby, the actuator frequently being a discharge guide.
522+, for axially slidable tubes, sleeves or apertured caps, many of which have flow controllers or closures associated therewith and see the notes thereto for other sleeves, tubes, or apertured caps having axial slidable, rotary or combined motions.
529, for foldable, bendable, collapsible or flexible discharge guides combined with a closure or flow controller.
531+, for movable discharge guides of closure type. 536, for swingable discharge guides with flow controller or closure.
544+, for miscellaneous flow controllers or closures.
