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Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
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Class 122 | LIQUID HEATERS AND VAPORIZERS |
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1R | PLANTS |
4R | MISCELLANEOUS |
5 | GAS-PRODUCER |
5.51 | AIR-INJECTED |
6R | INDUSTRIAL |
6.5 | Port |
6.6 | Tuyeres |
7R | Waste heat |
8 | Water firebox |
6A | Water-cooled walls |
6B | Bosh plates |
6C | Skew arch coolers |
10 | FOR FLUID FUEL BURNER |
11 | ROTARY |
12 | ROTATABLY SUPPORTED |
13.01 | STAND BOILER (E.G., WATER HEATER, ETC.) |
13.3 | And delivery means to dispensing feature |
14.1 | And condition responsive feature |
14.2 | Controls burner |
14.21 | By other than temperature of water |
14.22 | By temperature of water in a water containing chamber or external tank |
14.3 | Having water flow control feature |
15.1 | Heated by liquid or steam (e.g., indirect heating, etc.) |
16.1 | Solid fuel burner |
17.1 | Fluid fuel burner |
17.2 | Liquid fuel burner |
18.1 | Having heat exchange feature |
18.2 | Preheater |
18.3 | Fire tube or flue surrounded by water containing chamber |
18.4 | Water tube surrounded by burned fuel |
18.5 | And external water tank |
19.1 | Water containing chamber or external tank having circulation feature within |
19.2 | And casing feature for stand boiler or external water tank therefor |
20R | SUBSIDIARY |
29 | ANNULAR FIREBOX |
30 | MAGAZINE |
INDIRECTLY HEATED |
31.1 | INDIRECTLY HEATED SEPARATE INJECTED FLUID |
35 | ACCUMULATOR |
36 | AUXILIARY STEAM HEATER |
37 | COMPARTMENT |
39 | FILM |
40 | FLASHER |
42 | FIRE AND WATER TUBE |
44.1 | FIRE TUBE |
44.2 | With baffle in flue |
49 | Horizontal and vertical |
Horizontal or inclined |
51 | Horizontal |
52 | Plural |
Central firebox |
55 | Cylinder |
Depending fire tube |
Double water firebox |
58R | Drop water firebox |
59 | Circulation conduit |
Double |
61 | Drop water baffle |
62 | Front and rear water baffle |
63 | Front water baffle |
64 | Interposed combustion chamber |
65 | Rear water baffle |
66 | Water coking chamber |
Water grate |
68 | Water tube |
58FB | Fire box construction |
72 | Projecting into firebox |
Return and reverse |
75 | Return fire tube |
79 | Subjacent water arch |
80 | Subjacent flue |
81 | Subjacent transverse fire tube |
Superjacent feed heater |
83 | Transverse diaphragm |
Two diameters |
87 | U-coupling |
88 | Upper drum |
Water arch |
90 | Water firebox |
Firebox water heater |
92 | Magazine |
93 | Offset |
95.1 | Plural with common combustion chamber |
96 | Superposed |
Water grate |
Water tube |
Water tube type |
101 | Water smoke box |
Water tube |
106 | Water wall |
109 | Inclined |
Transverse |
114 | Vertical |
116 | Central fire dome |
117 | Central magazine |
Circulation tube |
119 | Cylinder |
120 | Offset firebox |
121 | Return fire tube |
123 | Separate compartment |
124 | Side magazine |
125 | Top water chamber |
126 | Water firebox |
Water grate |
130 | Water tube |
115 | Fluid fuel |
134 | Volute |
46 | Magazine |
Flue |
45 | Fluid fuel |
135.1 | FLUE |
135.2 | Alternative stack |
135.3 | Sinusoidal flue |
136R | Horizontal |
137 | Plural |
139 | Drop water firebox |
140.1 | Internal water tube |
140.2 | Having water tube in flue |
Longitudinal |
142 | Return fire tube |
143 | Spur |
144 | Subjacent firebox |
145 | Transverse |
148 | Water firebox |
149 | Return fire tube |
152 | Water grate in flue |
153 | Water tube |
136C | Horizontal-corrugated or finned |
155.1 | Vertical |
155.2 | With flue baffle |
155.3 | Having exterior heating flue |
155.4 | Having corrugated flue |
155.5 | Having undulating flue |
157 | Central magazine |
Circulation tube |
160 | Concentric shell |
163 | Exterior drum |
165 | Internal water heater |
166.1 | With internal water tube |
166.2 | Loop-type tube |
168 | Central magazine |
169 | Coil |
171 | Contracted inlet |
172 | Header |
173 | Horizontal spur |
174 | Internal fire tube |
175 | Offset water firebox |
176 | Transverse |
178 | Vertical aligned fire tube |
181 | Vertical spur |
167 | Fluid fuel |
182.1 | With return fire tube |
Spiral water conduit |
Standpipe |
187 | Transverse fire tube |
164 | Insulated outlet flue |
156 | Fluid fuel |
HORIZONTAL CYLINDER |
188 | Drop water baffle |
Offset subjacent firebox |
Subjacent fire tube |
192 | Water bridge wall |
193 | Water firebox |
195 | Water tube |
PLATE |
209.1 | SECTIONAL |
209.2 | Feeding air |
213 | Plural firebox |
Horizontal sections |
214 | Superimposed |
Vertical sections |
221 | Annularly positioned |
223 | Longitudinally positioned |
225R | Transversely positioned |
226 | Casing |
228 | Divided section |
229 | Water grate |
225A | Water heater in flue |
225B | Water heater in boiler |
225F | Feeding air |
230 | Two-section |
212.1 | With magazine |
211 | Fluid or solid fuel |
210 | Fluid fuel |
232 | Water grate |
231 | Accessories |
TANK |
235.11 | WATER TUBE |
235.12 | Wall structure |
235.13 | With fuel burners having posts and tuyeres |
235.14 | Tube structure |
235.15 | Headers and connections |
235.16 | For plural fluids |
235.17 | Having baffles |
235.18 | Having seals |
235.19 | D-type tube |
235.22 | Wall loop |
235.23 | Having specific tube patterns |
235.24 | Screens |
235.26 | Having slag and ash disposal |
235.27 | Locomotive-type |
235.28 | Having rotary flame |
235.29 | Having forced circulation system |
235.31 | Having specific intenal drum and head structure |
235.32 | With combustion |
235.33 | With convection zone regulation |
235.34 | With parallel multiple fireboxes |
235.35 | With serial multiple fireboxes |
238 | Offset firebox |
239 | Superimposed firebox |
240.1 | Having plural fireboxes |
241 | Firebox in drum |
242 | Capillary |
Coil or loop |
247 | Coil |
253 | Cross |
258 | Downflow |
259 | Drum type |
260 | Flat |
262 | Horizontal |
265 | Inclined |
266 | Internal fire tube |
273 | Longitudinal upper drum |
275 | Loop |
276 | Firebox enclosing |
277 | Over bridge wall |
Over firebox |
Over bridge wall |
Over firebox |
Rearwardly declined |
Over bridge wall |
Over firebox |
Plural upper transverse drum |
Rearwardly inclined |
Separate banks |
305 | Spur |
306 | Bridge wall header |
307 | Central standpipe |
311 | Cross |
312 | Horizontal-longitudinal drum |
313 | Over bridge wall |
Over firebox |
317 | Straddle |
318 | Vertical |
321 | Standpipe |
324 | Straddle |
331 | Transverse horizontal drum |
332 | Vertical |
333 | Fluid fuel |
334 | Side magazine |
335 | Annular firebox |
336 | Offset firebox |
Annular lower drum |
345 | Beyond bridge wall |
Internal fire tube |
349 | Over firebox |
Plural upper longitudinal drum |
Plural upper transverse drum |
353 | Water grate |
355 | Zigzag |
237 | Magazine |
236 | Fluid fuel |
Headers |
365 | Drums and couplings |
366 | WICK |
367.1 | HEAT TRANSMITTER |
367.2 | Double immersed heat transmitters |
367.3 | Corrugated and finned heat transmitters |
367.4 | Pebble furnaces |
368 | WATER FIREBOX |
371 | WATER GRATE |
21 | CHEMICAL |
22 | FLUID AND SOLID FUEL |
23 | FLUID FUEL |
26 | FRICTION GENERATOR |
NONCOMBUSTIBLE HEATER |
379 | CLEANING |
380 | Agitating circulator |
Blow off |
390 | Fluid jet |
393 | Mud drum |
394 | Pans |
395 | Sandblast |
396 | Systems |
397 | Trapped circuit |
405 | Wash-out nozzle |
406.1 | CIRCULATION |
406.2 | Having anticavitation devices |
406.3 | Having restrictors and orifices |
406.4 | Once through |
406.5 | With start-up operations |
407 | Injector |
408.1 | Having internal conduit |
Mechanical |
412 | FEED HEATERS |
413 | Ash pan |
Boiler circuit |
Circulatioon |
417 | Drip plate in boiler |
Fire-engine boiler |
420 | Furnace gases |
421 | Offtake flue |
422 | Furnace gases and steam |
Horizontal fire tube boiler |
428 | Internal conduit |
429 | Automatic sediment valve |
430 | Blow-off delivery |
431 | Filter in boiler |
432 | Furnace gases |
433 | Trap outside boiler |
434 | Locomotive tender |
435 | Pan in steam space |
437 | Safety valve |
438 | Spray to steam space |
439 | Stack |
441 | Steam |
444 | Water tube boiler |
REGULATION |
448.1 | AUTOMATIC CONTROL OF FLUID FUEL AND WATER |
451R | FEEDERS |
459 | STEAM TREATMENT |
460 | Boilers with superheaters |
Fire tube boiler |
Horizontal |
461 | Superheater |
466 | Superheater and feed heater |
Vertical |
Flue boiler |
Horizontal boiler |
Water tube boiler |
Declined over bridge wall |
Longitudinal drum |
Over bridge wall |
Standpipe |
Transverse drum |
477 | Superheater and feed heater |
476 | Superheater |
Superheater |
480 | Damper-controlled |
481 | Firebox |
482 | Fire tube in steam space |
483 | Indirectly heated |
484 | Separate charges |
485 | Separate furnace |
486 | Steam dome |
487 | Water-injected |
479.1 | Automatic heat regulation of superheater |
SEPARATORS |
488 | Boiler circulation |
489 | Boiler return |
490 | For tilting boilers |
491 | Interior of boilers |
492 | Steam dome |
493 | BRACES AND STAYS |
494 | CASINGS |
495 | CROWN SHEETS PROTECTING |
496 | CROWN SHEETS AND STAYS |
497 | FRONTS |
501 | FLUID-DISPLACER |
503 | FUEL BAFFLES |
504 | SAFETY DEVICES |
508 | STEAM DOMES |
509 | SUBMERGED STEAM CHAMBER |
510 | SUPPORTS |
511 | TUBES AND CONNECTIONS |
512 | TUBE SHEETS |
FOREIGN ART COLLECTIONS | ||
FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
Any foreign patents or non-patent literature from subclasses that have been reclassified have been transferred directly to FOR Collections listed below. These Collections contain ONLY foreign patents or non-patent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived. | ||
FOR100 | STAND BOILER (122/13.1) |
FOR101 | Electric (122/13.2) |
Fire tube and water tube (122/unnumbered) |
Fire tube (122/unnumbered) |
Water tube (122/unnumbered) |
FOR106 | Fluid fuel (122/14) |
FOR107 | Solid fuel (122/15) |
DIGESTS | ||
DIG1 | AIR HEATER |
DIG2 | AIR HEATER - INDIRECTLY HEATED |
DIG3 | GAS FLOW BAFFLES |
DIG4 | ONCE THROUGH BOILERS |
DIG5 | CRITICAL PRESSURE |
DIG6 | DAMPER-DIRECTED RADIATION |
DIG7 | FEEDING AIR |
DIG10 | PORTABLE UNITS |
DIG11 | REMOVABLE STEAM-HEATING ELEMENTS |
DIG13 | TUBES - COMPOSITION AND PROTECTION |
DIG14 | TUBE REPLACEMENT |
DIG15 | VALVES |
DIG16 | WELDING |
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