US PATENT SUBCLASS 432 / 25
.~.~ Providing pulsed or periodically reversed atmosphere

Current as of: June, 1999
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432 /   HD   HEATING

1  DF  PROCESSES OF HEATING OR HEATER OPERATION {14}
19  DF  .~ Controlling flame position or work atmosphere {7}
25.~.~ Providing pulsed or periodically reversed atmosphere

DEFINITION

Classification: 432/25

(under subclass 19) Process in which the atmosphere surrounding the work is caused to reverse its direction of flow periodically or is given periodic or rhythmical pressure waves or impulses.

SEE OR SEARCH CLASS

431, Combustion,

1, for combustion bursts or flareups in pulses or in serial pattern.