US PATENT SUBCLASS 15 / 406
.~.~.~ For hollow work, internal cleaning, e.g., tube soot-blowers

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}
405  DF  .~.~ Air blast only {1}
406.~.~.~ For hollow work, internal cleaning, e.g., tube soot-blowers {2}
407  DF  .~.~.~.~> Work operated valve
408  DF  .~.~.~.~> With induced flow of ambient air, e.g., jet pump

DEFINITION

Classification: 15/406

(under subclass 405) Apparatus especially adapted for cleaning the inside of hollow work.

(1) Note. Many of these devices could be used for other than internal cleaning, but peculiarities such as, for example, radially outwardly directed air streams, or tapered nozzles or other devices for cooperating with the open ends of pipes, if disclosed as intended for internal cleaning, will be sufficient to cause classification in this or the indented subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

409, for nozzle devices embodying a jet pump for inducing a flow of air through a tube.