(under subclass 12.01) Subject matter including means to confine, direct or control the flow of the treating fluid.
SEE OR SEARCH THIS CLASS, SUBCLASS:
12.05, for the control of the sequential liquid treatment steps in a single tub in response to the height of the treating liquid in the tub.
SEE OR SEARCH CLASS
137, Fluid Handling, appropriate subclasses for a mere valved pipe;
59+, 107, 302+, 312+, 427, 562, 565.36, 577+, and 596 for an overflow and drain of general utility; subclass 268 for a fluid handling system including means for holding solid material which is to be dissolved or entrained in fluid; appropriate subclass for means to valve soap to the machine; and subclass 387 for a liquid level responsive or maintaining system for controlling the operation of a washing machine.
