US PATENT SUBCLASS 110 / 325
.~.~.~ And structure to bridge pipes

Current as of: June, 1999
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110 /   HD   FURNACES

322  DF  BAFFLE OR HEAT RETAINER STRUCTURE {2}
323  DF  .~ Refractory type {1}
324  DF  .~.~ Having concavity for engaging pipe exterior {1}
325.~.~.~ And structure to bridge pipes

DEFINITION

Classification: 110/325

And structure to bridge pipes:

(under subclass 324) Structure wherein the refractory structure is further provided with a second concavity such that refractory structure simultaneously engages two separate boiler water tubes.