US PATENT SUBCLASS 110 / 160
.~.~ Air jet

Current as of: June, 1999
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110 /   HD   FURNACES

147  DF  DRAFT REGULATORS {5}
*  DD  .~ Stack {2}
160.~.~ Air jet {1}
161  DF  .~.~.~> Steam injected

DEFINITION

Classification: 110/160

(under subclass 147) Devices for forcing a jet of air into a stack or chimney to regulate the draft by induction.

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162, for fan-type exhausts.

SEE OR SEARCH CLASS

96, Gas Separation: Apparatus,

372+, for gas separation apparatus including inlet means for diverse gas or solid for gas treatment.