(under subclass 251) Dispensers having projecting parts of the discharge assistant following a path variable with respect to other parts, to increase and decrease the extent of projection. The purpose is to facilitate picking up and discharging material, not to vary the discharge volume.
SEE OR SEARCH THIS CLASS, SUBCLASS:
282+, for discharge assistants having discharge volume varying means and especially subclass 291 for devices similar to those having volume varying function.
SEE OR SEARCH CLASS
221, Article Dispensing,
270, for article dispensers having reciprocating discharge assistants having retractable pusher elements.
418, Rotary Expansible Chamber Devices, 259+, for rotary expansible chamber devices of the positively actuated vane type and subclass 270, for similar devices in which the vane is not actuated or biased.
