.~.~.~> For hollow work, internal cleaning, e.g., tube soot-blowers {2}
DEFINITION
Classification: 15/405
(under subclass 300) Cleaning apparatus in which the sole cleaning agency is a draft of air from a source of higher-than-atmospheric pressure.
(1) Note. An air blast device claimed as part of a noncleaning device or process is classified with such device or process, for example, sand blast abrading is classified in Class 451, Abrading.
SEE OR SEARCH THIS CLASS, SUBCLASS:
316+, for installed or fixed position cleaners using air blast only.
330, for cleaners convertible to or from suction and air-blast.
345, for cleaners utilizing both air blast and suction. SEE OR SEARCH CLASS
122, Liquid Heaters and Vaporizers, particularly
390+, for fluid agency cleaning devices combined with boiler structure, and see the reference to Class 122 under the definition of subclass 301 above for a statement of the line and reference to other classes involving cleaning of the tube type exchanging apparatus.
239, Fluid Sprinkling, Spraying, and Diffusing, appropriate subclasses for fluid discharging or distributing devices of general utility and which may be disclosed as being combined or capable of combination with cleaning structures. For a statement of the line, see the reference to Class 239 in the definition of
300, of this class (15).
417, Pumps, for details of the pump subcombination of an air blast cleaner. For a statement of the line, see the reference to Class 417 in the definition of
300, of this class (15).
418, Rotary Expansible Chamber Devices, for rotary expansible chamber devices, per se. For a statement of the line, see the reference to Class 418 in the definition of
