US PATENT SUBCLASS 137 / 299
.~ With valve at outlet
Current as of: June, 1999
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DEFINITION
Classification: 137/299
(under subclass 272) Apparatus which includes one or more valves at outlets from the riser, either in the riser or in a discharge spout, and provided in addition to the main or foot valve of the riser.
SEE OR SEARCH THIS CLASS, SUBCLASS:
613+, for systems involving a single flow path with plural serial valves, and see the search notes to subclass 613.
861+, for systems involving flow control means for plural passages, and see the search notes to subclass 861.
SEE OR SEARCH CLASS
251, Valves and Valve Actuation, 147, for pipe terminal mountings for valves.
