US PATENT SUBCLASS 454 / 40
.~.~.~ Plural, in-series jets

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


454 /   HD   VENTILATION

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

DEFINITION

Classification: 454/40

Plural, in-series jets:

(under subclass 39) Subject matter comprising two such nozzles, the high velocity fluid streams issuing from the nozzles acting on the air or products of combustion one after another in sequence.