US PATENT SUBCLASS 15 / 408
.~.~.~.~ With induced flow of ambient air, e.g., jet pump

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  DF  .~.~.~ For hollow work, internal cleaning, e.g., tube soot-blowers {2}
408.~.~.~.~ With induced flow of ambient air, e.g., jet pump

DEFINITION

Classification: 15/408

(under subclass 406) Apparatus having provisions whereby the fluid blast induces a flow of ambient air into the tube or other hollow work at the same end of such tube or work as the power fluid is applied.

(1) Note. The fluids may or may not commingle; in many cases the disclosure is that the induced fluid cleans the outermost end of the tube while the power fluid cleans the remainder.

(2) Note. Patents for two-tube cleaners wherein a blast of air is directed into one tube and the blast is also used to induce a flow in an adjacent tube are classified in subclass 406 above.