DIFF Subgroup
F28D 7/10 the conduits being arranged one within the other, e.g. concentrically
Introduced: September 1968
Full Title
Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall > the conduits being arranged one within the other, e.g. concentrically
Of 4 combined children, 2 exist in both systems.
2 codes are CPC-only extensions.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- F28D 7/12 the surrounding tube being closed at one end, e.g. return type (F28D7/14 takes precedence) IPC+CPC Available in IPC and CPC