(under subclass 206) Dispensers in which either (1) a resilient wall type pump or pulsator generates fluid pressure for causing discharge of the material from the container, or (2) a removable flexible wall closure (that usually serves as a pump or pulsator) is provided.
SEE OR SEARCH THIS CLASS, SUBCLASS:
207+, in which a removable resilient wall forcing device receives material from a supply container.
394+, for other dispensers in which the material is caused to dispense by a fluid under pressure, and see the notes thereto.
SEE OR SEARCH CLASS
137, Fluid Handling,
150, for collapsible bulb fluid pressure generating pumps for starting siphons.
