(under subclass 425) Dispensers in which the trap is filled and emptied through a single passage, and the cutoff alternately connects this passage with the supply and the dispenser outlet.
SEE OR SEARCH THIS CLASS, SUBCLASS:
306, for movable trap chambers with adjustable bottom volume varying means, with a single inflow-outflow passage.
363+, for oscillating trap chambers having a single inflow-outflow passage.
366, for miscellaneous reciprocating trap chambers having a single inflow-outflow passage.
368+, for rotary trap chambers having single inflow-outflow passages.
