F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  
LIGHTING AND HEATING
 F28
HEAT EXCHANGE IN GENERAL
 F28

Note(s)

  1. Apparatus using heat exchange or heat transfer (as defined below) for specific purposes is classified either in sub-class F28B or in the appropriate sub-classes of, for example, classes F22, F24, F25, F26, or F27; if no such other sub-class is appropriate, such apparatus is classified in sub-clas F28C or F28D.
  2. In this class, the following terms are used with the meanings indicated:
    1. "Heat exchange" means the heating or cooling of a fluid or fluent solid by direct or indirect contact with a heated or cooled fluid or fluent solid.
    2. "Heat transfer" means the heating or cooling of a fluid or fluent solid by direct contact with a heated or cooled surface or body.
 F28G
CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OF BOILERS (cleaning pipes or tubes in general B08B; cleaning furnace tubes, cleaning flues or chimneys F23J; removing ice from heat-exchange apparatus F28F 17/00)
 F28G 1/00
Non-rotary, e.g. reciprocated, appliances (F28G 3/00 takes precedence)
 F28G 1/02
·  having brushes (brushes A46B)
 F28G 1/04
·  having articulated tools, e.g. assembled in chain manner
 F28G 1/06
·  having coiled wire tools, i.e. basket type
 F28G 1/08
·  having scrapers, hammers, or cutters, e.g. rigidly mounted
 F28G 1/10
·  ·  resiliently mounted
 F28G 1/12
·  Fluid-propelled scrapers, bullets, or like solid bodies
 F28G 1/14
·  Pull-through rods
 F28G 1/16
·  using jets of fluid for removing debris (F28G 1/12 takes precedence)
 F28G 3/00
Rotary appliances
 F28G 3/02
·  having abrasive tools
 F28G 3/04
·  having brushes (brushes A46B)
 F28G 3/06
·  having articulated tools, e.g. assembled in chain manner
 F28G 3/08
·  having coiled wire tools, i.e. basket type
 F28G 3/10
·  having scrapers, hammers, or cutters, e.g. rigidly mounted
 F28G 3/12
·  ·  resiliently mounted
 F28G 3/14
·  ·  thrown into working position by centrifugal force
 F28G 3/16
·  using jets of fluid for removing debris
 F28G 5/00
Cleaning by distortion (by vibration F28G 7/00)
 F28G 7/00
Cleaning by vibration
 F28G 9/00
Cleaning by flushing or washing, e.g. with chemical solvents (appliances using jets of fluid for removing debris F28G 1/16, F28G 3/16)
 F28G 11/00
Cleaning by combustion processes, e.g. using squibs, using travelling burners
 F28G 13/00
Appliances or processes not covered by groups F28G 1/00-F28G 11/00; Combinations of appliances or processes covered by groups F28G 1/00-F28G 11/00
 F28G 15/00
Details (measuring thickness of deposit G01B)
 F28G 15/02
·  Supports for cleaning appliances, e.g. frames
 F28G 15/04
·  Feeding and driving arrangements, e.g. power operation
 F28G 15/06
·  ·  Automatic reversing devices
 F28G 15/08
·  Locating position of cleaning appliances within conduits
 F28G 15/10
·  Masks for delimiting area to be cleaned