US PATENT SUBCLASS 454 / 39
.~.~ Having air current inducing jet


Current as of: June, 1999
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454 /   HD   VENTILATION

1  DF  CHIMNEY OR STACK {6}
3  DF  .~ Chimneytop or stacktop structure (e.g., cowl) {12}
39.~.~ Having air current inducing jet {1}
40  DF  .~.~.~> Plural, in-series jets


DEFINITION

Classification: 454/39

Having air current inducing jet:

(under subclass 3) Subject matter comprising a nozzle for ejecting a high velocity fluid stream which causes flow of air or products of combustion through the vertical conduit section.

SEE OR SEARCH THIS CLASS, SUBCLASS:

22+, for a chimney or stacktop which uses a diverted natural air current to induce flow in the outlet airway.

116, for a railcar, bus, or trailer which uses a current inducing jet (often wind caused by movement of the vehicle) to induce flow in the outlet airway.

163, for other vehicles which use a current inducing jet (often wind caused by the movement of the vehicle) to induce flow in the outlet airway.