| Class Number |
Class Name |
No. of Patents |
| 432/253 |
Accessory means for holding, shielding or supporting work within furnace |
279 |
| 432/262 |
Crucible |
51 |
| 432/263 |
Having dispensing opening or spout |
19 |
| 432/264 |
Lined, layered or coated |
70 |
| 432/265 |
Of particular material |
51 |
| 432/254.1 |
Fluid tight metallic heat transferring box, shield or hood |
15 |
| 432/254.2 |
Bell-type hood or support for such hood |
11 |
| 432/260 |
For annular work (e.g., coil separator, etc.) |
23 |
| 432/261 |
Openwork tray, basket, or grid structure for heat treating metal |
53 |
| 432/258 |
Support structure for heat treating ceramics (e.g., saggars, etc.) |
183 |
| 432/259 |
Point or line contact support |
75 |
| 432/59 |
Advancing structure flexing, looping or coiling sheet, web or strand |
301 |
| 432/60 |
Internally heated roll |
343 |
| 432/33 |
Article or template follower positions heating element relative to article |
6 |
| 432/90 |
Boiler and work heating furnace, pot or oven |
13 |
| 432/91 |
Having means utilizing generated steam in heating work |
16 |
| 432/92 |
Combined |
2 |
| 432/73 |
Combustion products, flue or generator and work chamber mounted for relative movement for access |
2 |
| 432/89 |
Convertible |
1 |
| 432/94 |
Disparate heat sources or fuels |
7 |
| 432/35 |
Frangible or fusible safety relief or shutdown means |
7 |
| 432/62 |
Geographic or structural installation |
9 |
| 432/63 |
Installed on internal combustion engine element |
5 |
| 432/36 |
Having condition responsive control |
55 |
| 432/37 |
Analyzer or composition sensor of work, work atmosphere or exhaust gas |
77 |
| 432/46 |
Condition responsive shutdown requiring reset |
6 |
| 432/38 |
Control of or response to apparatus protecting fluid or means |
7 |
| 432/48 |
Of cooling, dilution, withdrawal, bypass or circulation of work chamber atmosphere |
26 |
| 432/43 |
Of discharging, or stopping the heating of a unit or batch on sensed completion of heating |
14 |
| 432/44 |
With cool-down timer or means |
4 |
| 432/40 |
Of hot blast stove (i.e., of cowper stove) |
14 |
| 432/49 |
Of or by heat generation or transmission |
19 |
| 432/45 |
Of or by means sensing or controlling work movement, quantity or position |
25 |
| 432/47 |
Of or by pressure of fluid work or work chamber atmosphere |
19 |
| 432/42 |
Of protective work shield, cooler or atmosphere; or of heat applicator position |
9 |
| 432/41 |
Of purger, purge period, scavenger or cleaner |
3 |
| 432/39 |
Of selection or load balancing of furnace exhaust heated regenerators |
5 |
| 432/64 |
Having fluid curtain at chamber port or work path |
46 |
| 432/226 |
Having mask, baffle or conductor concentrating heat on or protecting section of article |
57 |
| 432/34 |
Having operating or controlling device responding to presence of discrete work unit or removable unit holder |
9 |
| 432/51 |
Having timing, programming or cycling control means |
29 |
| 432/52 |
Of handling or treatment of discrete work batch or unit |
6 |
| 432/53 |
And of furnace closure or heating element operator |
8 |
| 432/93 |
Having work heating chamber and open access work supporting and heating and heating structure outside of chamber |
11 |
| 432/225 |
Heat applicator having structure for mounting it on or around object to be heated |
124 |
| 432/214 |
Heat generating means heats heat storage mass of solid material |
28 |
| 432/217 |
Dividing wall in casing forms combustion and heat storage chambers |
28 |
| 432/218 |
Annular divider forms concentric chambers |
3 |
| 432/216 |
Interconnected separately encased masses |
9 |
| 432/215 |
Mass is solid fluent heat carrier (e.g., pebbles, etc.) |
47 |
| 432/219 |
Heat generator heats gas or liquid material in a flow structure |
45 |
| 432/222 |
Material heated by mixing with combustion products of generator |
178 |
| 432/223 |
Having means for indirectly exchanging heat between combustion products and material |
58 |
| 432/221 |
With means utilizing the heated material for heating work |
8 |
| 432/220 |
With pump for the material driven by energy from the heat generator |
2 |
| 432/227 |
Heat generator with an associated work support or heat delivery structure |
39 |
| 432/231 |
Article engaging and retaining support fixes position of article relative to heat emitter |
43 |
| 432/232 |
Horizontal, planar, openwork, work support above burner |
5 |
| 432/228 |
Internally heated roll |
83 |
| 432/230 |
Means moving or guiding work relative to heat emitter during heating |
53 |
| 432/229 |
Movably mounted heat emitter traverses work during heating |
26 |
| 432/233 |
Heating apparatus element having protective cooling structure |
49 |
| 432/235 |
Conveyor, chute or work agitator element |
39 |
| 432/236 |
Roll |
60 |
| 432/237 |
Door, cover, door frame or rim of cover |
26 |
| 432/238 |
Wall, floor or roof element |
66 |
| 432/234 |
Work skid or rail structure |
118 |
| 432/247 |
Heating or heat retaining work chamber structure |
155 |
| 432/250 |
Door, cover or port |
162 |
| 432/251 |
Having expansion relieving or absorbing means |
67 |
| 432/249 |
Including baffle wall, work shield, or work support element |
75 |
| 432/252 |
Masonry with metallic casing or support |
41 |
| 432/248 |
Protected, lined or reinforced melt holding section |
66 |
| 432/224 |
Inserted emitter type of hollow article interior heater |
46 |
| 432/266 |
Miscellaneous |
12 |
| 432/1 |
Processes of heating or heater operation |
49 |
| 432/8 |
Continous strip, strand or web passed longitudinally through heating zone |
173 |
| 432/19 |
Controlling flame position or work atmosphere |
62 |
| 432/26 |
By mode of admission of treating or protecting fluid |
26 |
| 432/23 |
Establishing or maintaining composition of atmosphere bathing work |
47 |
| 432/22 |
Establishing strata, layer or curtain |
17 |
| 432/21 |
Including recycling work atmosphere |
26 |
| 432/24 |
Modulating or stabilizing pressure or temperature |
54 |
| 432/20 |
Providing flame or high luminosity |
18 |
| 432/25 |
Providing pulsed or periodically reversed atmosphere |
48 |
| 432/31 |
Heating of or by wall or radiant surface |
39 |
| 432/4 |
Including apparatus heat-up, cool-down or protection |
64 |
| 432/2 |
Including apparatus purging, cleaning or accretion preventing |
80 |
| 432/13 |
Including melting, vaporizing, sintering, expanding comminuting, or classifying work material |
183 |
| 432/14 |
Including passing, treating or conveying gas into or through particulate work |
396 |
| 432/16 |
Including a dust control or particle separation step |
38 |
| 432/15 |
Including maintenance of fluidized bed |
175 |
| 432/17 |
Including modulation of flow rate of gas or treated material |
40 |
| 432/5 |
Including preparing or arranging work for heating |
149 |
| 432/7 |
Forming a permeable layer or sheet |
0 |
| 432/6 |
Stacking or aligning objects |
82 |
| 432/3 |
Including repairing, converting or assembling apparatus |
76 |
| 432/27 |
Including the flowing or circulating of particulate heat carrier |
22 |
| 432/29 |
Of heating a fluid |
47 |
| 432/30 |
Utilizing a heat storage mass |
45 |
| 432/28 |
Of operating a furnace utilizing a heat storage mass |
34 |
| 432/18 |
Subjecting work to diverse treatments or graduated temperatures |
99 |
| 432/9 |
Treating an article, container, batch or body as a unit |
65 |
| 432/10 |
Localized treating or shielding of work area |
49 |
| 432/12 |
Modulating, varying or augmenting heat supply during heat-up period |
43 |
| 432/11 |
Moving unit through or within treating zone during treating |
172 |
| 432/95 |
Shaft type |
71 |
| 432/96 |
Having combustion products generated in or fed to shaft |
63 |
| 432/98 |
Having agitator or movably mounted baffle for shaft or shaft outlet |
33 |
| 432/101 |
Having distinct combustion products generator chamber |
30 |
| 432/100 |
Having distinct fume outlet and work inlet |
18 |
| 432/97 |
Having flow controller restraining solid and passing melt |
31 |
| 432/99 |
Having vertically spaced gas supply ports |
77 |
| 432/102 |
Having heat emitting tube or flue within or traversing shaft chamber |
36 |
| 432/500 |
Tobacco barns |
36 |
| 432/103 |
Tumbler-type rotary - drum furnace |
180 |
| 432/112 |
Externally heated drum or associated heating element heats work by conduction or radiation |
55 |
| 432/113 |
And having distinct atmosphere supply or removal structure |
44 |
| 432/114 |
Heat emitter is tube within the drum chamber or the drum wall |
35 |
| 432/119 |
Having brick-type lining |
38 |
| 432/105 |
Having combustion products generated in or fed to drum |
150 |
| 432/107 |
And having externally heated drum surface or indirect heating flue |
63 |
| 432/106 |
Including plural, distinct serially connected work chambers |
388 |
| 432/108 |
Work advancing type (e.g., steady flow of work) |
29 |
| 432/109 |
Axially spaced feed to drum of combustion or reaction material |
28 |
| 432/111 |
Counterflow of work and combustion products |
73 |
| 432/110 |
Structure providing different rates of heating or work movement along axis |
34 |
| 432/115 |
Having flexible, cooled, or air curtain seal between rotary and stationary parts |
69 |
| 432/116 |
Having protective cooling structure |
39 |
| 432/118 |
Having structure agitating or controlling the motion of the charge |
166 |
| 432/104 |
Having support for engaging heated surface of domestic stove |
12 |
| 432/117 |
Having work or work atmosphere feed or discharge structure |
73 |
| 432/76 |
With apparatus repair or assembly means |
22 |
| 432/75 |
With cleaning means for apparatus |
58 |
| 432/55 |
With concurrent control or inter-control of diverse operable elements |
12 |
| 432/56 |
Door or baffle movement correlated with work movement or placement |
10 |
| 432/57 |
Heating gas supply, removal or recirculation correlated with work or door movement or placement |
9 |
| 432/66 |
With condenser or absorber for work chamber vapor |
9 |
| 432/74 |
With drip, leakage, breakage or soil collecting structure |
3 |
| 432/65 |
With heat shield, or escaping gas collector at furnace chamber access area |
31 |
| 432/58 |
With heating gas conveying, agitating, scattering or disintegration of work (e.g., fluidized bed, etc.) |
546 |
| 432/32 |
With indicator, illuminator or inspection means |
33 |
| 432/54 |
With interlocked, interconnected or multiway controller alternating flow of heated and heating fluid |
10 |
| 432/61 |
With lump breaker or classifier for particulate work material |
5 |
| 432/72 |
With means diluting, purifying or burning exhaust gases |
269 |
| 432/86 |
With means receiving work from work heating zone discharge means |
3 |
| 432/67 |
With means separating solid particles or slag from work chamber gas |
14 |
| 432/70 |
At regenerator or recuperator (e.g., slag pocket, etc.) |
2 |
| 432/71 |
With separated solid discharge structure |
2 |
| 432/68 |
Separator discharges gas to work zone |
5 |
| 432/69 |
With means passing separated solid to heating zone |
6 |
| 432/87 |
With means supplying work to work feeder |
1 |
| 432/50 |
With protector, cleaner or support for condition sensor |
8 |
| 432/88 |
With wheel, handle, or skid-type support for heater assembly |
5 |
| 432/77 |
With work cooling structure |
171 |
| 432/78 |
Combustion feed air cools exiting work by contact |
93 |
| 432/79 |
Contact at discharge end section of shaft furnace |
16 |
| 432/80 |
Work manipulated in cooling zone |
67 |
| 432/85 |
Cooling liquid contacts work |
33 |
| 432/82 |
Entering and leaving work exchange heat |
23 |
| 432/83 |
Work heat removed through heat transmitting wall |
42 |
| 432/84 |
Combustion feed material cools wall |
6 |
| 432/81 |
Work holder having selectively usable heating and cooling structure |
24 |
| 432/120 |
Work chamber having heating means |
73 |
| 432/159 |
Combustion products heat work by contact |
33 |
| 432/184 |
Article inserted type |
9 |
| 432/194 |
Baffle, shield, heat absorber, work support or flow directing means in work chamber |
44 |
| 432/177 |
Chamber exhaust transfers heat with chamber wall |
14 |
| 432/186 |
Distinct combustion chamber feeds work chamber |
13 |
| 432/190 |
Distinct vertically spaced combustion products feed openings to work chamber |
5 |
| 432/187 |
Having additional feed means diluting combustion products |
5 |
| 432/189 |
Having pump or jet means forcing air into combustion chamber |
12 |
| 432/192 |
Multiple perforate wall, floor or roof for combustion feed or exit |
39 |
| 432/191 |
Plural distinct combustion chambers feed single work chamber |
1 |
| 432/188 |
Work chamber indirectly heating by common wall or connecting flue |
6 |
| 432/185 |
Dividing baffle or screen in cabinet forms upper work and lower burner chambers |
10 |
| 432/183 |
For annular article (e.g., wheel rim, etc.) |
5 |
| 432/160 |
Furnace or work holder of furnace mounted for tilting discharge |
8 |
| 432/176 |
Having exhaust return passage or recirculating fan or jet |
96 |
| 432/173 |
Having protective cooling means for combustion material feed structure |
6 |
| 432/161 |
Having separator of flow director for melted work |
29 |
| 432/162 |
Having shelf, rack, tray or chamber on guide or pivot |
27 |
| 432/195 |
Hearth-type or tank-type furnace |
25 |
| 432/174 |
Including noncommunicating combustion products flue |
4 |
| 432/163 |
Plural structurally related work chambers |
16 |
| 432/164 |
Connected for serial flow of combustion products |
18 |
| 432/166 |
Chambers spatially separated |
0 |
| 432/170 |
Having branch connection to common flue |
5 |
| 432/165 |
Having serially connected regenerator |
0 |
| 432/167 |
Having temporary partition |
3 |
| 432/168 |
Through perforated floor |
4 |
| 432/169 |
Through perforated partition |
1 |
| 432/171 |
Diverse atmospheres (e.g., directly and indirectly heated, etc.) |
18 |
| 432/172 |
Fed with combustion products from a common generator |
5 |
| 432/175 |
Radiant-type burner in or on wall (e.g., surface combustion, etc.) |
55 |
| 432/193 |
Spaced exhaust ports from work chamber |
8 |
| 432/196 |
Spaced fuel or air feeds to work chamber |
29 |
| 432/179 |
Work chamber exhaust heats chamber feed |
75 |
| 432/180 |
By regenerative-type heat exchanger |
137 |
| 432/181 |
Spaced alternating or successive chamber exhausts feed plural regenerators |
134 |
| 432/182 |
Regenerators heat fuel |
37 |
| 432/178 |
Work chamber or its wall heats chamber feed |
10 |
| 432/156 |
Crucible or pot heating furnace |
69 |
| 432/157 |
Having tilting arrangement |
21 |
| 432/158 |
Pot stand forms annular combustion material admission zone |
8 |
| 432/210 |
Externally heated, liquid holding type of work container |
33 |
| 432/211 |
Mounted for pouring discharge |
5 |
| 432/121 |
Having means by which work is progressed or moved mechanically |
196 |
| 432/155 |
Chamber heated by multiple combustion products flues |
2 |
| 432/136 |
Combustion products generated in or fed to chamber |
22 |
| 432/143 |
Having means forming work path from inlet to outlet |
29 |
| 432/148 |
Baffle, heat radiator, or heating flue in chamber along path |
66 |
| 432/149 |
Combustion material supply ports spaced along path |
15 |
| 432/144 |
Having structure circulating work atmosphere along or across path |
100 |
| 432/145 |
Distinct blowers or blower discharge ports along path |
75 |
| 432/146 |
Plural burners longitudinal spaced in path |
45 |
| 432/147 |
Radiant type |
30 |
| 432/150 |
Spaced combustion products exhaust ports |
10 |
| 432/137 |
Movable chamber floor section carried by external guide or axle |
73 |
| 432/138 |
Rotary section |
78 |
| 432/139 |
Plough, rake, screw, or stirrer means |
60 |
| 432/140 |
Moved by endless carrier |
8 |
| 432/141 |
Rotatably mounted work carrier (e.g., ferris wheel type, etc.) |
18 |
| 432/142 |
Horizontal shelf on vertical axis |
20 |
| 432/152 |
Having distinct atmosphere supply, removal or recirculation structure |
245 |
| 432/122 |
Having manipulating means arranging, orienting, segregating or topically heating individual unit |
92 |
| 432/123 |
Handler outside of chamber supports unit partially within and partially outside of furnace chamber |
18 |
| 432/124 |
Having structure rotating, reorienting, or inverting unit during heating |
113 |
| 432/126 |
Thrust means advances row or stack of units |
42 |
| 432/127 |
Having structure for removing skid marks |
19 |
| 432/125 |
Vertical stack or mutually supporting units having thrust means |
13 |
| 432/128 |
Plural distinct chambers |
160 |
| 432/133 |
Having combustion products generated in or fed to work chamber |
53 |
| 432/129 |
Work moved to drop between shelf or trough-type chambers |
9 |
| 432/130 |
Combustion products generated in or fed to chamber |
12 |
| 432/131 |
Annular shelves and rotary pusher on central vertical axis |
13 |
| 432/132 |
Heated shelf or trough |
8 |
| 432/151 |
Stirrer in externally heated tank |
20 |
| 432/135 |
Traveling heat emitter carries or stirs work |
4 |
| 432/134 |
Vibrating or jarring-type work advancer |
38 |
| 432/153 |
Work or work carrier slides on heated chamber wall or floor |
35 |
| 432/154 |
Screw-type pusher |
8 |
| 432/197 |
Having particulate or liquid heat transfer medium in work chamber |
57 |
| 432/199 |
Having work atmosphere recirculating means |
81 |
| 432/209 |
Heating tube, element, or flue traverses work space |
95 |
| 432/206 |
Interior bell forms muffle |
57 |
| 432/198 |
Means supplying a protective or treating agent other than or additional to air |
48 |
| 432/207 |
Plural structurally related work heating chambers |
17 |
| 432/208 |
Chambers are movably or removably mounted retorts |
9 |
| 432/212 |
Tortuous, branched or baffled heating flue means within or along chamber wall |
12 |
| 432/213 |
Having distinct burner units |
8 |
| 432/200 |
Work chamber having gaseous material supply or removal structure |
49 |
| 432/201 |
Air flow-through type |
15 |
| 432/204 |
Having a movable drawer or separable tray |
3 |
| 432/202 |
Having means heating work by radiation or conduction |
26 |
| 432/203 |
Pump for atmosphere |
11 |
| 432/205 |
Having pump, jet or valve means establishing chamber pressure distinct from ambient |
133 |
| 432/239 |
Work feeding, agitating, discharging or conveying subcombination |
225 |
| 432/242 |
Having closure or seal for work feeder's entrance passage |
142 |
| 432/245 |
Having distinct heat shield, conductor, director or expansion relief structure |
38 |
| 432/240 |
Having support for engaging surface of domestic stove |
0 |
| 432/243 |
Outside conveyor track paralleled by chamber wall slot for conveyor arm |
30 |
| 432/241 |
Removable furnace bottom section or kiln cart |
241 |
| 432/246 |
Roll-type conveyor element |
97 |
| 432/244 |
Seal at chamber wall for conveyor arm or shaft |
23 |
