What follows are the subclasses from one class of the Manual of Classification for US patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retrieve patent titles by entering the class/subclass in the box below.
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Class Number: 432 Class Title: HEATING Subclass Subclass Number Title 1 PROCESSES OF HEATING OR HEATER OPERATION 2 .Including apparatus purging, cleaning or accretion preventing 3 .Including repairing, converting or assembling apparatus 4 .Including apparatus heat-up, cool-down or protection 5 .Including preparing or arranging work for heating 6 ..Stacking or aligning objects 7 ..Forming a permeable layer or sheet 8 .Continous strip, strand or web passed longitudinally through heating zone 9 .Treating an article, container, batch or body as a unit 10 ..Localized treating or shielding of work area 11 ..Moving unit through or within treating zone during treating 12 ..Modulating, varying or augmenting heat supply during heat-up period 13 .Including melting, vaporizing, sintering, expanding comminuting, or classifying work material 14 .Including passing, treating or conveying gas into or through particulate work 15 ..Including maintenance of fluidized bed 16 ..Including a dust control or particle separation step 17 ..Including modulation of flow rate of gas or treated material 18 .Subjecting work to diverse treatments or graduated temperatures 19 .Controlling flame position or work atmosphere 20 ..Providing flame or high luminosity 21 ..Including recycling work atmosphere 22 ..Establishing strata, layer or curtain 23 ..Establishing or maintaining composition of atmosphere bathing work 24 ..Modulating or stabilizing pressure or temperature 25 ..Providing pulsed or periodically reversed atmosphere 26 ..By mode of admission of treating or protecting fluid 27 .Including the flowing or circulating of particulate heat carrier 28 .Of operating a furnace utilizing a heat storage mass 29 .Of heating a fluid 30 ..Utilizing a heat storage mass 31 .Heating of or by wall or radiant surface 32 WITH INDICATOR, ILLUMINATOR OR INSPECTION MEANS 33 ARTICLE OR TEMPLATE FOLLOWER POSITIONS HEATING ELEMENT RELATIVE TO ARTICLE 34 HAVING OPERATING OR CONTROLLING DEVICE RESPONDING TO PRESENCE OF DISCRETE WORK UNIT OR REMOVABLE UNIT HOLDER 35 FRANGIBLE OR FUSIBLE SAFETY RELIEF OR SHUTDOWN MEANS 36 HAVING CONDITION RESPONSIVE CONTROL 37 .Analyzer or composition sensor of work, work atmosphere or exhaust gas 38 .Control of or response to apparatus protecting fluid or means 39 .Of selection or load balancing of furnace exhaust heated regenerators 40 .Of hot blast stove (i.e., of Cowper stove) 41 .Of purger, purge period, scavenger or cleanerr 42 .Of protective work shield, cooler or atmosphere; or of heat applicator position 43 .Of discharging, or stopping the heating of a unit or batch on sensed completion of heating 44 ..With cool-down timer or means 45 .Of or by means sensing or controlling work movement, quantity or position 46 .Condition responsive shutdown requiring reset 47 .Of or by pressure of fluid work or work chamber atmosphere 48 .Of cooling, dilution, withdrawal, bypass or circulation of work chamber atmosphere 49 .Of or by heat generation or transmission 50 WITH PROTECTOR, CLEANER OR SUPPORT FOR CONDITION SENSOR 51 HAVING TIMING, PROGRAMMING OR CYCLING CONTROL MEANS 52 .Of handling or treatment of discrete work batch or unit 53 ..And of furnace closure or heating element operator 54 WITH INTERLOCKED, INTERCONNECTED OR MULTIWAY CONTROLLER ALTERNATING FLOW OF HEATED AND HEATING FLUID 55 WITH CONCURRENT CONTROL OR INTER-CONTROL OF DIVERSE OPERABLE ELEMENTS 56 .Door or baffle movement correlated with work movement or placement 57 .Heating gas supply, removal or recirculation correlated with work or door movement or placement 58 WITH HEATING GAS CONVEYING, AGITATING, SCATTERING OR DISINTEGRATION OF WORK (E.G., FLUIDIZED BED, ETC.) 59 ADVANCING STRUCTURE FLEXING, LOOPING OR COILING SHEET, WEB OR STRAND 60 .Internally heated roll 61 WITH LUMP BREAKER OR CLASSIFIER FOR PARTICULATE WORK MATERIAL 62 GEOGRAPHIC OR STRUCTURAL INSTALLATION 63 .Installed on internal combustion engine element 64 HAVING FLUID CURTAIN AT CHAMBER PORT OR WORK PATH 65 WITH HEAT SHIELD, OR ESCAPING GAS COLLECTOR AT FURNACE CHAMBER ACCESS AREA 66 WITH CONDENSER OR ABSORBER FOR WORK CHAMBER VAPOR 67 WITH MEANS SEPARATING SOLID PARTICLES OR SLAG FROM WORK CHAMBER GAS 68 .Separator discharges gas to work zone 69 .With means passing separated solid to heating zone 70 .At regenerator or recuperator (e.g., slag pocket, etc.) 71 ..With separated solid discharge structure 72 WITH MEANS DILUTING, PURIFYING OR BURNING EXHAUST GASES 73 COMBUSTION PRODUCTS, FLUE OR GENERATOR AND WORK CHAMBER MOUNTED FOR RELATIVE MOVEMENT FOR ACCESS 74 WITH DRIP, LEAKAGE, BREAKAGE OR SOIL COLLECTING STRUCTURE 75 WITH CLEANING MEANS FOR APPARATUS 76 WITH APPARATUS REPAIR OR ASSEMBLY MEANS 77 WITH WORK COOLING STRUCTURE 78 .Combustion feed air cools exiting work by contact 79 ..Contact at discharge end section of shaft furnace 80 ..Work manipulated in cooling zone 81 .Work holder having selectively usable heating and cooling structure 82 .Entering and leaving work exchange heat 83 .Work heat removed through heat transmitting wall 84 ..Combustion feed material cools wall 85 .Cooling liquid contacts workk 86 WITH MEANS RECEIVING WORK FROM WORK HEATING ZONE DISCHARGE MEANS 87 WITH MEANS SUPPLYING WORK TO WORK FEEDER 88 WITH WHEEL, HANDLE, OR SKID-TYPE SUPPORT FOR HEATER ASSEMBLY 89 CONVERTIBLE 90 BOILER AND WORK HEATING FURNACE, POT OR OVEN 91 .Having means utilizing generated steam in heating work 92 COMBINED 93 HAVING WORK HEATING CHAMBER AND OPEN ACCESS WORK SUPPORTING AND HEATING AND HEATING STRUCTURE OUTSIDE OF CHAMBER 94 DISPARATE HEAT SOURCES OR FUELS 95 SHAFT TYPE 96 .Having combustion products generated in or fed to shaft 97 ..Having flow controller restraining solid and passing melt 98 ..Having agitator or movably mounted baffle for shaft or shaft outlet 99 ..Having vertically spaced gas supply ports 100 ..Having distinct fume outlet and work inlet 101 ..Having distinct combustion products generator chamber 102 .Having heat emitting tube or flue within or traversing shaft chamber 103 TUMBLER-TYPE ROTARY - DRUM FURNACE 104 .Having support for engaging heated surface of domestic stove 105 .Having combustion products generated in or fed to drum 106 ..Including plural, distinct serially connected work chambers 107 ..And having externally heated drum surface or indirect heating flue 108 ..Work advancing type (e.g., steady flow of work) 109 ...Axially spaced feed to drum of combustion or reaction material 110 ...Structure providing different rates of heating or work movement along axis 111 ...Counterflow of work and combustion products 112 .Externally heated drum or associated heating element heats work by conduction or radiation 113 ..And having distinct atmosphere supply or removal structure 114 ..Heat emitter is tube within the drum chamber or the drum wall 115 .Having flexible, cooled, or air curtain seal between rotary and stationary parts 116 .Having protective cooling structure 117 .Having work or work atmosphere feed or discharge structure 118 .Having structure agitating or controlling the motion of the charge 119 .Having brick-type lining 120 WORK CHAMBER HAVING HEATING MEANS 121 .Having means by which work is progressed or moved mechanically 122 ..Having manipulating means arranging, orienting, segregating or topically heating individual unit 123 ...Handler outside of chamber supports unit partially within and partially outside of furnace chamber 124 ...Having structure rotating, reorienting, or inverting unit during heating 125 ...Vertical stack or mutually supporting units having thrust means 126 ...Thrust means advances row or stack of units 127 ....Having structure for removing skid marks 128 ..Plural distinct chambers 129 ...Work moved to drop between shelf or trough-type chamberss 130 ....Combustion products generated in or fed to chamber 131 .....Annular shelves and rotary pusher on central vertical axis 132 ....Heated shelf or trough 133 ...Having combustion products generated in or fed to work chamber 134 ..Vibrating or jarring-type work advancer 135 ..Traveling heat emitter carries or stirs work 136 ..Combustion products generated in or fed to chamber 137 ...Movable chamber floor section carried by external guide or axle 138 ....Rotary section 139 ...Plough, rake, screw, or stirrer means 140 ....Moved by endless carrier 141 ...Rotatably mounted work carrier (e.g., Ferris wheel type, etc.) 142 ....Horizontal shelf on vertical axis 143 ...Having means forming work path from inlet to outlet 144 ....Having structure circulating work atmosphere along or across path 145 .....Distinct blowers or blower discharge ports along path 146 ....Plural burners longitudinal spaced in path 147 .....Radiant type 148 ....Baffle, heat radiator, or heating flue in chamber along path 149 ....Combustion material supply ports spaced along path 150 ....Spaced combustion products exhaust ports 151 ..Stirrer in externally heated tank 152 ..Having distinct atmosphere supply, removal or recirculation structure 153 ..Work or work carrier slides on heated chamber wall or floor 154 ...Screw-type pusher 155 ..Chamber heated by multiple combustion products flues 156 .Crucible or pot heating furnace 157 ..Having tilting arrangement 158 ..Pot stand forms annular combustion material admission zone 159 .Combustion products heat work by contact 160 ..Furnace or work holder of furnace mounted for tilting discharge 161 ..Having separator of flow director for melted work 162 ..Having shelf, rack, tray or chamber on guide or pivot 163 ..Plural structurally related work chambers 164 ...Connected for serial flow of combustion products 165 ....Having serially connected regenerator 166 ....Chambers spatially separated 167 ....Having temporary partition 168 ....Through perforated floor 169 ....Through perforated partition 170 ....Having branch connection to common flue 171 ...Diverse atmospheres (e.g., directly and indirectly heated, etc.) 172 ...Fed with combustion products from a common generator 173 ..Having protective cooling means for combustion material feed structure 174 ..Including noncommunicating combustion products flue 175 ..Radiant-type burner in or on wall (e.g., surface combustion, etc.) 176 ..Having exhaust return passage or recirculating fan or jet 177 ..Chamber exhaust transfers heat with chamber walll 178 ..Work chamber or its wall heats chamber feed 179 ..Work chamber exhaust heats chamber feed 180 ...By regenerative-type heat exchanger 181 ....Spaced alternating or successive chamber exhausts feed plural regenerators 182 .....Regenerators heat fuel 183 ..For annular article (e.g., wheel rim, etc.) 184 ..Article inserted type 185 ..Dividing baffle or screen in cabinet forms upper work and lower burner chambers 186 ..Distinct combustion chamber feeds work chamber 187 ...Having additional feed means diluting combustion products 188 ...Work chamber indirectly heating by common wall or connecting flue 189 ...Having pump or jet means forcing air into combustion chamber 190 ...Distinct vertically spaced combustion products feed openings to work chamber 191 ...Plural distinct combustion chambers feed single work chamber 192 ...Multiple perforate wall, floor or roof for combustion feed or exit 193 ..Spaced exhaust ports from work chamber 194 ..Baffle, shield, heat absorber, work support or flow directing means in work chamber 195 ..Hearth-type or tank-type furnace 196 ..Spaced fuel or air feeds to work chamber 197 .Having particulate or liquid heat transfer medium in work chamber 198 .Means supplying a protective or treating agent other than or additional to air 199 .Having work atmosphere recirculating means 200 .Work chamber having gaseous material supply or removal structure 201 ..Air flow-through type 202 ...Having means heating work by radiation or conduction 203 ...Pump for atmosphere 204 ...Having a movable drawer or separable tray 205 ..Having pump, jet or valve means establishing chamber pressure distinct from ambient 206 .Interior bell forms muffle 207 .Plural structurally related work heating chambers 208 ..Chambers are movably or removably mounted retorts 209 .Heating tube, element, or flue traverses work space 210 .Externally heated, liquid holding type of work container 211 ..Mounted for pouring discharge 212 .Tortuous, branched or baffled heating flue means within or along chamber wall 213 ..Having distinct burner units 214 HEAT GENERATING MEANS HEATS HEAT STORAGE MASS OF SOLID MATERIAL 215 .Mass is solid fluent heat carrier (e.g., pebbles, etc.) 216 .Interconnected separately encased masses 217 .Dividing wall in casing forms combustion and heat storage chambers 218 ..Annular divider forms concentric chambers 219 HEAT GENERATOR HEATS GAS OR LIQUID MATERIAL IN A FLOW STRUCTURE 220 .With pump for the material driven by energy from the heat generator 221 .With means utilizing the heated material for heating work 222 .Material heated by mixing with combustion products off generator 223 ..Having means for indirectly exchanging heat between combustion products and material 224 INSERTED EMITTER TYPE OF HOLLOW ARTICLE INTERIOR HEATER 225 HEAT APPLICATOR HAVING STRUCTURE FOR MOUNTING IT ON OR AROUND OBJECT TO BE HEATED 226 HAVING MASK, BAFFLE OR CONDUCTOR CONCENTRATING HEAT ON OR PROTECTING SECTION OF ARTICLE 227 HEAT GENERATOR WITH AN ASSOCIATED WORK SUPPORT OR HEAT DELIVERY STRUCTURE 228 .Internally heated roll 229 .Movably mounted heat emitter traverses work during heating 230 .Means moving or guiding work relative to heat emitter during heating 231 .Article engaging and retaining support fixes position of article relative to heat emitter 232 .Horizontal, planar, openwork, work support above burner 233 HEATING APPARATUS ELEMENT HAVING PROTECTIVE COOLING STRUCTURE 234 .Work skid or rail structure 235 .Conveyor, chute or work agitator element 236 ..Roll 237 .Door, cover, door frame or rim of cover 238 .Wall, floor or roof element 239 WORK FEEDING, AGITATING, DISCHARGING OR CONVEYING SUBCOMBINATION 240 .Having support for engaging surface of domestic stove 241 .Removable furnace bottom section or kiln cart 242 .Having closure or seal for work feeder's entrance passage 243 .Outside conveyor track paralleled by chamber wall slot for conveyor arm 244 .Seal at chamber wall for conveyor arm or shaft 245 .Having distinct heat shield, conductor, director or expansion relief structure 246 .Roll-type conveyor element 247 HEATING OR HEAT RETAINING WORK CHAMBER STRUCTURE 248 .Protected, lined or reinforced melt holding section 249 .Including baffle wall, work shield, or work support element 250 .Door, cover or port 251 .Having expansion relieving or absorbing means 252 .Masonry with metallic casing or support 253 ACCESSORY MEANS FOR HOLDING, SHIELDING OR SUPPORTING WORK WITHIN FURNACE 254.1 .Fluid tight metallic heat transferring box, shield or hood 254.2 ..Bell-type hood or support for such hood 258 .Support structure for heat treating ceramics (e.g., saggars, etc.) 259 ..Point or line contact support 260 .For annular work (e.g., coil separator, etc.) 261 .Openwork tray, basket, or grid structure for heat treating metal 262 .Crucible 263 ..Having dispensing opening or spout 264 ..Lined, layered or coated 265 ..Of particular material 266 MISCELLANEOUS * ****************************** * CROSS-REFERENCE ART COLLECTIONN * ****************************** 500 TOBACCO BARNS