(under subclass 340) Apparatus in which there is a motion imparting means for operating a gas pump associated with the liquid receptacle.
(1) Note. For the broad relationship between the receptacle and the motor operated gas pump, this subclass must be searched. For the specific relationship between any gas pump (hand operated) and the various liquid, gas and vent conduits, subclasses 355+ must be searched.
SEE OR SEARCH THIS CLASS, SUBCLASS:
355+, and see (1) Note above.
SEE OR SEARCH CLASS
417, Pumps, appropriate subclasses for gas pumps, per se.
418, Rotary Expansible Chamber Devices, for rotary expansible chamber pumps, per se.
