(under subclass 561) Systems comprising a tank having a material guide or flow pipe extending into the interior of the tank.
(1) Note. Valved flow conduits which extend into the tank only far enough to provide for lateral flow passages and/or receive fastening or mounting means are not included in this group of subclasses, but are classified on the basis of the valve and/or actuator in succeeding subclasses.
(2) Note. Interiorly extending flow pipes and conduits are included when in addition to the fact of interior extension some result or function of the extension is expressed or is inherent, as (1) to prevent or minimize freezing, (2) for the purpose of decanting the liquid contained in the tank, (3) for deriving a representative sample of the fluid in the tank, (4) to admit fluid below the liquid level, (5) to provide an outlet for pump or fluid displacement discharge, etc.
SEE OR SEARCH THIS CLASS, SUBCLASS:
434+, especially subclasses 437, 438, 440, and 442+ for float arm operated inlet valves at the inlet end of an internally extending inlet pipe.
SEE OR SEARCH CLASS
210, Liquid Purification or Separation, 308+, for filters with upwardly extending internal flow guides.
222, Dispensing,
382, and 464.1+ for dispensers having an internally extending outlet pipe, and subclasses 547 and 564 for dispensers having
a flow guide or restrictor within the supply container.
251, Valves and Valve Actuation,
118+, for valves with material guides in the flow line, subclass 144 for a tank comprising a single flow path device provided with a single valve, and subclass 339 for valved devices wherein the valve actuator extends through a fluid inlet or outlet.
