(under subclass 403) Apparatus in which a single gravitating tank, with or without its mounting means, constitutes both the liquid accumulating means and the liquid level sensing means.
(1) Note. This subclass also takes the subcombination in which the valve or flow controlling means operated by the gravitating tank is not claimed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
120, for control of branched flow by filling of an auxiliary gravity tank.
161, and 162+, for gas pressure discharge of liquid feed-traps with gas pressure controlled by amount of liquid in trap by gravitating vessel, and 189 for valves in diverse fluid containing pressure systems controlled by gravitating vessels.
189, for fluid separating traps with discriminating outlet for liquid controlled by gravitating vessel.
402, for gravitating tank controlled tank outflow when supplemental or safety closing bias or means is involved. 404, for sinking or bucket float type gravitating tanks, and see the search notes thereto.
406+, for level response control means comprising an auxiliary gravitating tank.
SEE OR SEARCH CLASS
177, Weighing Scales,
60+, for a gravitating tank in an automatic weigher.
222, Dispensing,
52+, especially subclasses 56-58 for dispensing controlled by quantity or weight.
417, Pumps,
37, for a movable liquid receptacle for sensing liquid accumulation to control a pump drive motor.
