US PATENT SUBCLASS 237 / 66
.~ Expansion tanks

Current as of: June, 1999
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237 /   HD   HEATING SYSTEMS

56  DF  WATER {5}
66.~ Expansion tanks

DEFINITION

Classification: 237/66

(under subclass 56) Tanks or chambers limited in use to provide for the expansion of the water in the circulating pipes and radiators of water heating systems.

SEE OR SEARCH CLASS

137, Fluid Handling, appropriate subclasses for fluid handling apparatus including tanks in combination with other fluid handling means, see particularly

593, for such systems including an expansion chamber in combination.

220, Receptacles, for tank structure not necessarily limited to water heating systems.