(under subclass 315) Devices comprising a container having an access opening at the top and a valve located in a part of the container remote from the access opening usually at the bottom, with means for disassembling and removing the valve and/or its seat through the access opening.
SEE OR SEARCH THIS CLASS, SUBCLASS:
283+, for hydrants having a removable valve and valve seat.
584+, for dispensing systems comprising a tank having an access opening and a fluid inlet or outlet, and see the search notes to subclass 584.
