US PATENT SUBCLASS 15 / 316.1
.~.~.~ Air blast only (e.g., boiler soot-blower)

Current as of: June, 1999
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15 /   HD   BRUSHING, SCRUBBING, AND GENERAL CLEANING

3  DF  MACHINES {11}
300.1  DF  .~ With air blast or suction {26}
301  DF  .~.~ Fixed position cleaners or installed cleaning systems {6}
316.1.~.~.~ Air blast only (e.g., boiler soot-blower) {3}
317  DF  .~.~.~.~> With blowing element housing or protecting feature, e.g., embedded, disappearing or cooling
318  DF  .~.~.~.~> Moving nozzle with air supply control interlocked with nozzle motion means
318.1  DF  .~.~.~.~> Sequence control

DEFINITION

Classification: 15/316.1

Air blast only (e.g., boiler soot-blower):

(under subclass 301) Apparatus wherein the sole cleaning agency is a stream of air forced from a source of higher-than-atmospheric pressure.

(1) Note. A soot-blower is located in this and indented subclasses when disclosed as being of the type installed in a boiler but claiming no modification of the boiler. See (3) Note under subclass 301 for a further statement of the line and reference to other classes involving cleaning of tube type heat exchanging apparatus.

SEE OR SEARCH THIS CLASS, SUBCLASS:

314, for a soot-blower having a flexible conduit between the air source and the applying means.

405, for a cleaning apparatus utilizing an air blast as the sole cleaning agency, and not fixed or installed.

SEE OR SEARCH CLASS

122, Liquid Heaters and Vaporizers, particularly

390+, for a fluid agency cleaning device combined with boiler structure. See (1) Note above.