(under subclass 425) Dispensers having passages for venting the trap other than the dispensing passages or openings to accommodate the actuating members (even though such passages for dispensing or for actuating means are claimed as vents.
SEE OR SEARCH THIS CLASS, SUBCLASS:
332, for movable trap chambers with vents.
478+, for miscellaneous dispensers with plural openings, one or more of which may be vents, and see the notes thereunder.
SEE OR SEARCH CLASS
137, Fluid Handling,
171+, for fluid separating traps and vents in diverse fluid handling pressure systems.
