US PATENT SUBCLASS 137 / 283
.~ Removable valve and valve seat
Current as of:
June, 1999
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Terms of Use
137 /
HD
FLUID HANDLING
272
DF
HYDRANT TYPE
{15}
283
.~ Removable valve and valve seat {1}
284
DF
.~.~
> With extension to facilitate removal
DEFINITION
Classification: 137/283
(under subclass 272) Apparatus in which a valve and its valve seat are so arranged as to facilitate removal, usually where the valve opens downwardly.
(1) Note. The valve and valve seat concerned may be either the main valve or the drain valve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
234.5, and 454.2+, for other removable units.
326, for foot valve extraction through a tank.
327, for disassembly tool engaging features in fluent material handling systems.
439, for float arm operated valves which may be removed by working from the outside of the tank, leaving the actuating mechanism in the tank.
