U.S. PATENT AND TRADEMARK OFFICE
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U.S. Patent Classification System - Classification Definitions
as of June 30, 2000
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Class 110
FURNACES
Class Definition:
This class provides for the following:
Solid material combustion (*) apparatus with or without the
capability of utilizing auxiliary gaseous or liquid fuel
(*);
Solid material combustion apparatus convertible to a gaseous
or liquid fuel combustion apparatus;
Combustion apparatus for incinerating (*) solid or liquid
refuse (*);
Solid material combustion apparatus subcombinations and
structure not provided for elsewhere; or
Methods of operating solid material combustion apparatus not
provided for elsewhere.
SCOPE OF THE CLASS
Placement of an original patent into Class 110 requires the
following minimum structure or steps of operating such
structure: (1) means or a step to either convey or support
solid combustible material during combustion; (2) means or a
step to supply either directly or indirectly a noncombustible
fluid to the solid combustible material; and (3) means or a
step to enclose or control the combustion reaction.
Class 110 further provides for the following subcombination
devices peculiar to solid material combustion apparatus, the
following of which is a partial list: (1) Fuel Feeders. (2)
Spark Arresters. (3) Spark and Smoke Conductors. (See
Subclass Reference to this Class, below, for map to these
subclasses.)
Class 110 also provides for the following types of structure
peculiar to solid material combustion apparatus, the
following of which is a partial list: (1) Baffle or Heat
Retainer Structure. (2) Solid Fuel Feed Structure. (3) Arch
or Roof Structure. (4) Wall Structure. (See Subclass
Reference to this Class, below, for map to these
subclasses.)
LINES WITH OTHER CLASSES AND WITHIN THIS CLASS
RELATIONSHIP TO CLASSES INVOLVING, PER SE, FURNACES
A. THE CLASSES OF ELECTRICAL HEATING:
See Search Notes below for class of Industrial Electric
Heating Furnaces, for furnace structure with characteristics
limited to electric heating.
See Search Notes below for class of Electric Heating, for
electric heating characteristics including furnace
structure.
B. THE CLASSES OF HEATING:
See Search Notes below for class of Stoves and Furnaces,
provides for furnaces for ordinary domestic uses, cooking and
heating stoves; fireplaces; and hot-air furnaces.
See Search Notes below for class of Combustion, providing for
furnaces for burning of gaseous or liquid fuel material,
particularly for fluid-fed furnaces with or without other
noncombustible fluids; and for a furnace in which the fluid
fuel is fed tangentially to the wall of a circular combustion
chamber.
C. THE CLASSES OF PLASTIC AND PLASTIC TYPE MATERIAL SHAPING
AND TREATING:
See Search Notes below for class of Glass Manufacturing,
provides for furnaces specially adapted for making glass,
particularly for a glass melting furnace having a
structurally defined delivery or refining zone; and for a
glass annealing or tempering furnace including means to
control the rate of cooling.
See Search Notes below for class of Mineral Oils: Apparatus,
for furnaces specially adapted for oil treatment.
See Search Notes below for class of Metallurgical Apparatus,
provides for furnaces specially adapted for metallurgical
processes, particularly for furnaces treating ores or
extracting metals, and for furnaces for melting or vaporizing
metal.
D. THE CLASSES OF PLANT AND ANIMAL HUSBANDRY:
See Search Notes below for class of Butchering, for furnaces
specially adapted for singeing hogs.
RELATIONSHIP TO COMBINATION CLASSES
A. THE CLASSES OF MISCELLANEOUS TREATING:
See Search Notes below for class of Drying and Gas or Vapor
Contact With Solids for a furnace combined with a chamber
limited to drying work other than fuel or refuse.
B. THE CLASSES OF HEATING:
See Search Notes below for class of Liquid Heaters and
Vaporizers for a furnace combined with a boiler, particularly
for grates through which water circulates with or without
connection to the boiler.
See Search Notes below for class of Automatic Temperature and
Humidity Regulation, provides for furnaces combined with
automatic temperature and humidity regulators wherein the
furnace or furnace structure is broadly recited or claimed,
particularly for furnaces controlled by thermostats and
humidistats.
See Search Notes below for class of Heating, the residual
class for a furnace combined with means for applying heat so
as to treat material or work rather than for incinerating
refuse or burning solid fuel for the production of
transferable heat.
C. THE CLASS OF PHYSICAL SEPARATION:
See Search Notes below for class of Concentrating
Evaporators, for furnaces combined with evaporator structure
peculiar to the concentration of solids held in solution or
suspension.
D. THE CLASS OF COMMINUTING:
See Search Notes below for class of Solid Material
Comminution or Disintegration, for comminuting processes and
apparatus in combination with furnaces to apply heat to the
material.
E. THE CLASSES OF VEHICLES:
See Search Notes below for class of Railway Rolling Stock,
for the combination of a furnace with a steam locomotive.
RELATIONSHIP TO OTHER CLASSES
A. THE CLASSES OF EARTHWORKING:
See Search Notes below for class of Excavating for furnace
devices for snow excavators and melters.
B. THE CLASSES OF FLUID HANDLING:
See Search Notes below for class of Excavating, Pipes and
Tubular Conduits for furnace devices used in thawing pipes.
C. THE CLASSES OF MOTORS, ENGINES, AND PUMPS:
See Search Notes below for class of Power Plants for furnaces
for burning solid fuel for the production of products of
combustion intended to be used as a motive fluid.
D. THE CLASS FOR DEALING WITH NONNUCLEAR HAZARDOUS OR TOXIC
WASTE.
See Search Notes below for class of Hazardous or Toxic Waste
Destruction or Containment for the process of burning
hazardous or toxic waste, and for the apparatus used in the
treating of hazardous and toxic waste.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 101+ for Fuel Feeders.
subclasses 119+ for Spark Arresters.
subclasses 145+ for Spark and Smoke Conductors.
subclasses 267+ Solid Fuel Feed Structure.
subclasses 322+ for Baffle or Heat Retainer Structure.
subclasses 331+ for Arch or Roof Structure.
subclasses 336+ for Wall Structure.
REFERENCES TO OTHER CLASSES
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, provides for
a furnace combined with a chamber limited to drying work
other than fuel or refuse. See the notes in that class
definition for the line with Class 110.
37, Excavating, subclasses 227+ provides for furnace
devices for snow excavators and melters.
60, Power Plants, subclass 39.461 provides for furnaces for
burning solid fuel for the production of products of
combustion intended to be used as a motive fluid.
65, Glass Manufacturing, provides for furnaces specially
adapted for making glass, particularly subclass 347 for a
glass melting furnace having a structurally defined delivery
or refining zone; and subclasses 349+ for a glass annealing
or tempering furnace including means to control the rate of
cooling.
105, Railway Rolling Stock, subclasses 37+ provide for the
combination of a furnace with a steam locomotive.
122, Liquid Heaters and Vaporizers, provides for a furnace
combined with a boiler. See particularly subclasses 371+
of Class 122 for grates through which water circulates with
or without connection to the boiler.
126, Stoves and Furnaces, provides for furnaces for ordinary
domestic uses, such as subclasses 1+, cooking and heating
stoves; subclasses 500+, fireplaces; and subclass 99, hot-air
furnaces.
138, Pipes and Tubular Conduits, subclasses 32+ provide for
furnace devices used in thawing pipes.
159, Concentrating Evaporators, provides for furnaces
combined with evaporator structure peculiar to the
concentration of solids held in solution or suspension. See
particularly subclass 29 and 32.
196, Mineral Oils: Apparatus, subclasses 116+ provide for
furnaces specially adapted for oil treatment.
219, Electric Heating, subclasses 420+ provide for electric
heating characteristics including furnace structure.
236, Automatic Temperature and Humidity Regulation, provides
for furnaces combined with automatic temperature and humidity
regulators wherein the furnace or furnace structure is
broadly recited or claimed, particularly subclass 15 for
furnaces controlled by thermostats and humidistats.
241, Solid Material Comminution or Disintegration, provides
for comminuting processes and apparatus in combination with
furnaces to apply heat to the material. See section (6) of
the definition of that class for a statement of the line
between these classes.
266, Metallurgical Apparatus, provides for furnaces specially
adapted for metallurgical processes, particularly subclasses
171+ for furnaces treating ores or extracting metals, and
subclasses 200+ for furnaces for melting or vaporizing
metal.
373, Industrial Electric Heating Furnaces, provides for
furnace structure with characteristics limited to electric
heating.
431, Combustion, provides for furnaces for burning of gaseous
or liquid fuel material, particularly subclasses 159+ for
fluid-fed furnaces with or without other noncombustible
fluids; and subclasses 173+ for a furnace in which the fluid
fuel is fed tangentially to the wall of a circular combustion
chamber. See the head notes of Class 431 for the general
class line with this class.
432, Heating, is the residual class for a furnace combined
with means for applying heat so as to treat material or work
rather than for incinerating refuse or burning solid fuel for
the production of transferable heat.
452, Butchering, subclass 73 provides for furnaces specially
adapted for singeing hogs.
588, Hazardous or Toxic Waste Destruction or Containment,
appropriate subclasses for the process of burning hazardous
or toxic waste. Additionally, see cross-reference art
collection, subclass 900, for the apparatus used in the
treating of hazardous and toxic waste.
GLOSSARY:
COMBUSTION
The chemical action resulting from the direct combination of
oxygen gas, generally in air, with a combustible material
accompanied by the evolution of heat and light.
COMBUSTION CHAMBER
The structure immediately surrounding the combustion reaction
and generally above the fuel (*) or refuse (*) grate and
designed to support or promote the combustion reaction.
FUEL
A combustible material having good combustible properties
such as a relatively low ignition temperature, a long burning
time, and a minimum of impurities which hinder combustion and
used primarily to produce heat.
INCINERATION
The combustion of refuse (*) for primary purpose of disposing
of that refuse rather than for producing heat.
NONCOMBUSTIBLE FLUID
A gas or liquid which itself does not burn but which is
capable of supporting or promoting combustion (i.e., air,
steam, or water).
REFUSE
A combustible waste material which is burned for the sole or
primary purpose of disposing of that material.
SUBCLASSES
Subclass:
101
This subclass is indented under the class definition. Devices
for feeding fuel to furnaces not provided for above.
(1) Note. In this subclass are collected fuel feeders
having automatic control except those belonging in subclasses
103 and 186+.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 196+ for straw feeders.
subclasses 235+ for wet fuel feeders.
subclasses 263+ for devices for feeding fine fuel which is
burned in suspension.
subclasses 267+ for progressive feed stokers and grates.
SEE OR SEARCH CLASS:
48, Gas: Heating and Illuminating, subclass 86 for cupola
chargers.
198, Conveyors: Power-Driven, appropriate subclasses, for
conveyor structure.
202, Distillation: Apparatus, subclasses 262+ for feeding
apparatus for stills.
241, Solid Material Comminution or Disintegration,
appropriate subclasses, for fuel feeders, per se, including
means to comminute the material.
414, Material or Article Handling, subclass 146 for charging
or discharging means adapted for use with a nuclear reactor,
subclasses 147+ for the combination of a chamber of a type
utilized for a heating function and material charging or
discharging means therefor, and subclasses 568+ for a device
or element associated with the handling or moving of a charge
for a heating-type chamber.
Subclass:
102
This subclass is indented under subclass 101. Fuel-feeding
devices especially adapted for feeding shaving and sawdust to
furnaces.
(1) Note. Where the structure is capable of feeding coal
and other fuel also, it is classified under the other
fuel-feeding subclasses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
196 for feed-chutes located on straw-burning furnaces.
Subclass:
103
This subclass is indented under subclass 101. Devices for
feeding fuel whose operation is controlled by the pressure of
steam in the boiler heated by the fuel.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 186+ for furnaces having progressive-feed grates
whose movements and feeding mechanism are controlled by the
pressure of steam in the boiler.
subclasses 188+ for boiler controlled devices for feeding
air and steam.
SEE OR SEARCH CLASS:
236, Automatic Temperature and Humidity Regulation, subclass
26 for boiler pressure controlled regulating mechanism.
Subclass:
104
This subclass is indented under subclass 101. Devices for
blowing the fuel into the firebox either by air or steam or
both conjoined together, with devices for conveying the fuel
to the blower into the path of the fluid current, and all
devices for preparing the fuel by pulverizing it if
subsequently delivered to the furnace by a fluidjet.
SEE OR SEARCH CLASS:
198, Conveyors: Power-Driven, subclasses 638+ for a
thrower-type conveyor.
406, Conveyors: Fluid Current, appropriate subclasses for
means to convey solids with a fluid current. Class 406 will
take a nominally recited furnace combined with a fluid
current conveyor.
417, Pumps, subclass 151, for jet pumps.
Subclass:
105
This subclass is indented under subclass 104. Feeders in
which the fuel is fed from a hopper and delivered to furnace
by a blast of air or steam, such hopper being immediately
attached to the furnace.
SEE OR SEARCH THIS CLASS, SUBCLASS:
104 for devices in which the hopper feeds into a conduit a
long distance from the furnace.
Subclass:
105.5
This subclass is indented under subclass 104. Devices in
which a solid fuel feeder has fluid jet means for
distributing the fuel over a fire bed or grate. These
devices are generally known as the locomotive stoker type of
blower feeders though some are not disclosed for use on
locomotives.
SEE OR SEARCH CLASS:
105, Railway Rolling Stock, subclasses 232+ for coal feed
structure on locomotive tenders.
198, Conveyors: Power-Driven, appropriate subclasses for
conveyors of particular types, including reciprocating and
screw-type conveyors often used for feeding bulk material to
furnaces.
222, Dispensing, subclass 637 for a solid fuel feeder having
a fluid jet for blasting the fuel as it issues from a
feeder.
241, Solid Material Comminution or Disintegration, subclass
276 for locomotive-type stokers provided with comminuting
means, but including no furnace structure. See the general
line stated in section 6 of the main class definition of
Class 241.
Subclass:
105.6
This subclass is indented under subclass 105.5. Devices in
which the fuel feeding means causes the fuel to be elevated
from below and presented directly to the front of the fluid
jets.
SEE OR SEARCH THIS CLASS, SUBCLASS:
105.5 for plural diverse species, and devices having
additional jets to which the fuel is not underfed.
Subclass:
106
This subclass is indented under subclass 104. Devices having
a fan blower where the fuel is passed through the fan casing
and is pulverized by the fan blades, and it includes also
those devices having a fan blower and a rotary grinder in the
same casing or in a casing in close proximity to the fan
casing for pulverizing the fuel, and the fuel is passed on by
the air-current to the firebox.
SEE OR SEARCH CLASS:
241, Solid Material Comminution or Disintegration, subclass
18 and 38+ for comminution provided with means to apply
fluid to the material for some purpose other than to support
combustion. See the line stated in section (6) of the main
class definition of that class.
Subclass:
107
This subclass is indented under subclass 101. Devices for
feeding fuel to the furnace at the bridge wall.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 269+ for those that feed at the bridge wall upon
a chain grate.
Subclass:
108
This subclass is indented under subclass 101. Subject matter
relating to feed-hoppers, per se.
Subclass:
109
This subclass is indented under subclass 108. Devices in
which the fuel is simply pushed into the furnace by a
reciprocating member.
Subclass:
110
This subclass is indented under subclass 108. Devices that
push the fuel into the body of fuel in the firebox by a
rotary screw.
Subclass:
111
This subclass is indented under subclass 101. Devices that
have a carrier for taking the fuel into the furnace over the
fire and scattering it thereon, such carrier not passing
through the door.
SEE OR SEARCH CLASS:
198, Conveyors: Power-Driven, generally for various forms or
carriers.
202, Distillation: Apparatus, subclasses 262+ for similar
feeding apparatus for stills.
414, Material or Article Handling, subclasses 147+ (as
explained in subclass 101 of Class 110), and particularly
subclasses 172+ thereunder.
Subclass:
112
This subclass is indented under subclass 111. Devices for
carrying fuel through the furnace door over the fire and
scattering it thereon.
Subclass:
113
This subclass is indented under subclass 101. Devices having
an oscillating fuel spreader that scatters the fuel delivered
upon it over the fire.
SEE OR SEARCH CLASS:
414, Material or Article Handling, subclasses 172+ (as
explained in subclass 111 of Class 110), and particularly
subclass 194 thereunder.
Subclass:
114
This subclass is indented under subclass 101. Devices that
deliver the fuel before a plunger that scatters the coal over
the fire.
SEE OR SEARCH CLASS:
414, Material or Article Handling, subclasses 172+ (as
explained in subclass 111 of Class 110), and particularly
subclass 198 thereunder.
Subclass:
115
This subclass is indented under subclass 101. Devices having
a rotary fuel-spreader that scatters the fuel delivered to it
over the fire.
SEE OR SEARCH CLASS:
414, Material or Article Handling, subclasses 172+ (as
explained in subclass 111 of Class 110), and particularly
subclass 195 thereunder.
Subclass:
116
This subclass is indented under subclass 101. Devices for
feeding fuel through a gravity-feed chute to the furnace
through the furnace doorway.
Subclass:
117
This subclass is indented under subclass 116. Devices for
charging furnaces with fuel at intervals, either motor or
clock operated or operated by hand, at the will of the
operator, such being fed through the doorway of the furnace.
Subclass:
118
This subclass is indented under subclass 101. Devices for
delivering fuel to the firebox by gravity feed when the fuel
is fed from overhead and falls directly upon the fire from
above.
SEE OR SEARCH CLASS:
48, Gas: Heating and Illuminating, subclass 86 for similar
structure in cupola chargers.
266, Metallurgical Apparatus, subclasses 176+ for chargers
for metallurgical furnaces.
414, Material or Article Handling, subclasses 147+ (as
explained in subclass 101 of Class 110), and particularly
subclasses 167+ and 199+ thereunder.
Subclass:
119
This subclass is indented under the class definition. Devices
for preventing live sparks from passing out of the stack or
chimney. This is accomplished either by screens, baffles,
steam or water spray located either in the smokebox or
smokestack and in some cases by screens in the boiler flues.
SEE OR SEARCH THIS CLASS, SUBCLASS:
120 for devices for returning only the sparks to a firebox.
subclasses 145+ for devices wherein the sparks and smoke
are conducted away to the ground from the locomotive or over
the train.
subclasses 203+ for structure wherein both the smoke and
sparks are returned to the firebox.
subclasses 322+ for furnaces having ordinary baffles and
heat-retainers.
SEE OR SEARCH CLASS:
96, Gas Separation: Apparatus, appropriate subclasses, for
gas separation apparatus having no significant furnace
structure, especially subclasses 243+ for gas separation
apparatus combined with gas and liquid contact means.
126, Stoves and Furnaces, subclass 280, for soot catchers.
261, Gas and Liquid Contact Apparatus, for devices in which
the separation is effected by gas and liquid contact only.
454, Ventilation, subclasses 3+ for outlet cowls.
Subclass:
120
This subclass is indented under subclass 119. Devices in
which the sparks are returned to the furnace, either to the
firebox or ashpan.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 203+ for structure in which smoke and sparks
both are returned to the firebox.
Subclass:
121
This subclass is indented under subclass 119. Devices in
which the arrester is contained in both the stack and
smokebox.
SEE OR SEARCH CLASS:
55, Gas Separation, subclasses 447+ for fixed gas whirler
or rotator deflection separators.
Subclass:
122
This subclass is indented under subclass 119. Devices located
in the smokebox for arresting sparks.
Subclass:
123
This subclass is indented under subclass 122. Subject matter
including also draft regulation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
126 for devices including regulation of vertical drum type.
Subclass:
124
This subclass is indented under subclass 122. Devices having
two compartments, into one of which the sparks are
precipitated.
Subclass:
125
This subclass is indented under subclass 122. Devices having
a hood over the boiler tubes, through which the products of
combustion must pass.
Subclass:
126
This subclass is indented under subclass 122. Devices where
the arrester is hollow, somewhat cylindrical in form, and
vertically arranged, through which the exhaust-steam passes.
SEE OR SEARCH CLASS:
417, Pumps, subclasses 155+ for flue-type jet pumps.
Subclass:
127
This subclass is indented under subclass 122. Devices for
ejecting the sparks from the smokebox by a jet of steam, air,
water, fan, or other means.
Subclass:
128
This subclass is indented under subclass 122. Devices where
the sparks are precipitated into a water receptacle in the
smokebox and also includes devices with a steam or water
spray in combination with the receptacle.
SEE OR SEARCH THIS CLASS, SUBCLASS:
124 for structure in which sparks are precipitated into a
separate compartment of the smokebox, but not into a water
receptacle.
Subclass:
129
This subclass is indented under subclass 122. Devices
including discharge-valves for dumping the sparks from the
smokebox.
Subclass:
145
This subclass is indented under the class definition. Devices
applied to a stack or smokebox for conducting the smoke and
sparks and discharging them upon the ground or into the air.
They need not necessarily be conduits but may be shields or
deflectors. Includes conduits applied the stack of a boiler
used for threshing purposes on a farm, the conduit being
carried at a distance from the boiler or engine and
discharging into a water receptacle to prevent the sparks
setting fire to the straw.
SEE OR SEARCH THIS CLASS, SUBCLASS:
120 for furnace conductor spark arresters.
subclasses 198+ for smoke and gas return devices.
Subclass:
146
This subclass is indented under subclass 145. Devices having
a conduit extending from the smoke-discharge end of the
locomotive past the cars of the train to carry away the smoke
and sparks and discharge them at the rear of the train.
SEE OR SEARCH CLASS:
237, Heating Systems, subclass 12.5 for devices which use
the heat from the smoke to heat the cars.
Subclass:
147
This subclass is indented under the class definition. Devices
which act directly on the products of combustion after they
leave the firebox to affect the velocity of said products.
Also devices that act directly on the fire as blowers for the
fire, in combination with steam or air jets that either
increase or decrease the draft; and exhaust mechanisms that
have exhaust nozzles.
(1) Note. Where air or steam is injected into the products
for the sole purpose of more completely consuming the smoke
and gases, such devices are classified in this class, see
subclasses 297+, for feeding air or feeding steam.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclasses 285+, for ordinary
dampers for stoves and furnaces and their operating
mechanism.
236, Automatic Temperature and Humidity Regulation,
appropriate subclasses for automatic damper controls.
417, Pumps, subclasses 151+ for jet pumps.
454, Ventilation, subclasses 1+ for chimney or stack
structure, per se.
Subclass:
148
This subclass is indented under subclass 147. Devices for
separating the heavy gases and drawing them off, allowing
only the lighter gases to pass through the stack.
Subclass:
150
This subclass is indented under subclass 147. Devices in
which steam is injected into the path of the products of
combustion to regulate its velocity.
Subclass:
157
This subclass is indented under subclass 147. Devices for
admitting air to the smokebox or base of stack to retard the
draft.
SEE OR SEARCH CLASS:
96, Gas Separation: Apparatus, subclasses 372+ for gas
separation apparatus including inlet means for diverse gas or
solid for gas treatment.
Subclass:
158
This subclass is indented under subclass 157. Devices having
an air-opening valve controlled by movement of a furnace
door.
SEE OR SEARCH THIS CLASS, SUBCLASS:
174 for doors having means for feeding air or steam.
192 for time controls.
Subclass:
159
This subclass is indented under subclass 147. Devices applied
to a stack for a limited time to assist the draft, especially
in firing up a locomotive.
Subclass:
160
This subclass is indented under subclass 147. Devices for
forcing a jet of air into a stack or chimney to regulate the
draft by induction.
SEE OR SEARCH THIS CLASS, SUBCLASS:
162 for fan-type exhausts.
SEE OR SEARCH CLASS:
96, Gas Separation: Apparatus, subclasses 372+ for gas
separation apparatus including inlet means for diverse gas or
solid for gas treatment.
Subclass:
161
This subclass is indented under subclass 160. Devices
comprising a jet of steam.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 267+ for undergrate steam feeders.
Subclass:
162
This subclass is indented under subclass 147. Devices in
which the products of combustion or a part of them are drawn
through a fan to increase the draft.
SEE OR SEARCH THIS CLASS, SUBCLASS:
159 for portable fans designed to be applied to a smokestack
to assist the draft of the fire and capable of being readily
detached.
SEE OR SEARCH CLASS:
55, Gas Separation, subclasses 400+ for separators mounted
for continuous motion.
454, Ventilation, air pump subclasses.
Subclass:
163
This subclass is indented under subclass 147. Devices movable
in the path of the products of combustion for regulating the
cross sectional area of said path or for closing one path in
order to pass them through another or longer course.
SEE OR SEARCH THIS CLASS, SUBCLASS:
192 for time control devices.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclasses 285+ especially
subclasses 292-297 for dampers in the outlet-flue or stack
with its operating mechanism.
Subclass:
165
This subclass is indented under the class definition. Devices
for receiving and removing ashes, including ashpit
structures, ashpans and conveyors when furnace structure is
included.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclasses 242+ for devices for
domestic stoves and furnaces.
138, Pipes and Tubular Conduits, appropriate subclasses for
tubular conductors, per se.
198, Conveyors: Power-Driven, for form of conveyor.
202, Distillation: Apparatus, subclasses 227+, for quenchers
of that class.
209, Classifying, Separating, and Assorting Solids,
subclasses 233+ for sifters.
Subclass:
166
This subclass is indented under subclass 165. Devices
comprising receptacles under a furnace-grate for receiving
the ashes as they fall therefrom, except the ash-pit itself.
The pan must be a removable receptacle suspended from the
furnace or resting on a support beneath the grate or
permanently attached to the furnace, as in some locomotive
structures.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclasses 242+ for ashpans for
domestic stoves and furnaces.
Subclass:
167
This subclass is indented under subclass 166. Devices
relating to mechanical devices for emptying the ashpan,
including pans having scrapers or carriers, valves in the
bottom for allowing the ashes to fall out when opened, or
pans allowing the whole bottom to swing down to dump the
ashes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
171 for water or steam ejectors.
SEE OR SEARCH CLASS:
105, Railway Rolling-Stock, subclasses 239+ for dumping car
bodies.
Subclass:
168
This subclass is indented under subclass 167. Devices whose
bottoms are made of a plurality of sections pivoted at each
end and connected to a common operating-bar.
Subclass:
169
This subclass is indented under subclass 167. Ashpans that
dump the contents by reciprocating one or more valves in the
bottom of the pan.
Subclass:
170
This subclass is indented under subclass 167. Ashpans that
have a scraper for pushing the contents out of the pan.
Subclass:
171
This subclass is indented under subclass 166. Devices where
water or steam is injected into the ashpan for the purpose of
ejecting the ashes or extinguishing sparks.
Subclass:
172
This subclass is indented under the class definition.
Constructions for furnace-fronts, including door structures
in furnace-fronts.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclasses 497+ for
boiler fronts.
Subclass:
173
This subclass is indented under the class definition. Subject
matter relating to closures for openings in furnace-walls.
SEE OR SEARCH THIS CLASS, SUBCLASS:
172 for doors in front structure.
192 for devices which feed air or steam to the furnace for a
limited time.
SEE OR SEARCH CLASS:
48, Gas: Heating and Illuminating, subclass 124, for lids
for retorts.
49, Movable or Removable Closures, appropriate subclasses for
closures of the type provided for and see the search notes in
section IV of Class 49 for the loci of closures in other
classes.
122, Liquid Heaters and Vaporizers, subclass 498 for doors
with water circulation connected with the boiler.
126, Stoves and Furnaces, subclasses 190+ for stove doors.
202, Distillation: Apparatus, subclasses 242+ for still
closures.
Subclass:
174
This subclass is indented under subclass 173. Doors through
which air and steam or steam are fed to the fire and also
where air and steam or steam is fed to the fire when the
valve controlling the admission of the fluid is operated by
the door, whether the fluid passes through the door or not.
SEE OR SEARCH THIS CLASS, SUBCLASS:
192 for time limit controls.
Subclass:
175
This subclass is indented under subclass 173. Doors which
admit air to the furnace either by ports or conduits through
the door structure or having means for keeping the door
partly open where the construction is especially adapted for
admitting air other than by simply opening a door of common
construction.
SEE OR SEARCH THIS CLASS, SUBCLASS:
192 for time limit controls.
Subclass:
176
This subclass is indented under subclass 173. Devices for
opening and closing doors aside from the ordinary latch.
SEE OR SEARCH CLASS:
49, Movable or Removable Closures, subclasses 324+ for
other closure operators.
212, Traversing Hoists, subclass 166 for discrete apparatus
for removing a furnace door from above and shifting it
horizontally.
414, Material or Article Handling, subclass 684.3 for
furnace door removers which are disengaged from the furnace
door after replacement.
Subclass:
177
This subclass is indented under subclass 176. Devices
including a motor.
SEE OR SEARCH CLASS:
49, Movable or Removable Closures, subclass 334 for a motor
operated closure and see the search notes thereto for the
loci of other motor operated closures.
Subclass:
178
This subclass is indented under subclass 176. Devices using
foot-power directly.
SEE OR SEARCH CLASS:
49, Movable or Removable Closures, subclasses 263+ for
pedal operated closures of the type provided for.
Subclass:
179
This subclass is indented under subclass 173. Devices for
preventing the heat, gases, or flames from passing out of the
furnace when the door is opened either by a spray of steam,
air, or water or by causing air to be drawn into the door or
having means to draw the gases through a bypass when the door
is opened. These devices also serve to prevent the cold
outside air from cooling the boiler.
SEE OR SEARCH THIS CLASS, SUBCLASS:
163 for devices for preventing the chilling of the fire and
boiler-flues.
SEE OR SEARCH CLASS:
48, Gas: Heating and Illuminating, subclass 87 for cupola
screens.
Subclass:
180
This subclass is indented under the class definition. Subject
matter relating to doors and casings that are kept cool by
the circulation of steam or air through them.
SEE OR SEARCH THIS CLASS, SUBCLASS:
182 for doors and casings where the fluid after passing
through them is fed to the fire.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclasses 497+ for
boiler fronts.
202, Distillation: Apparatus, subclasses 243+ for fluid
cooled still closures.
432, Heating, subclass 237 for the subcombination of a
material heating chamber comprising a door, door frame or
chamber cover having protective cooling structure.
Subclass:
181
This subclass is indented under the class definition. Subject
matter relating to the construction of casings and arches for
furnace doors.
SEE OR SEARCH THIS CLASS, SUBCLASS:
180 for casings containing conduits.
subclasses 331+ for furnace arch construction.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), subclass 85, 86+,
245+, and 639+ for a curvilinear building construction of
more general application.
Subclass:
182
This subclass is indented under subclass 181. Arches and
casings with circulation conduits through which air or air
and steam are passed to be fed to the furnace.
SEE OR SEARCH THIS CLASS, SUBCLASS:
180 for casings having conduits for cooling them through
which air, steam, or water circulates, such steam or air not
passing into the furnace.
192 for time limit controls.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 112 for devices for
feeding air to hot air furnaces.
Subclass:
182.5
This subclass is indented under the class definition. Subject
matter relating to conduits for feeding air to furnaces.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 297+ for feeding of air to a firebox.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 6.6 for tuyeres
in boilers.
266, Metallurgical Apparatus, subclasses 186+, 218+, and 265+
for tuyeres used in a metallurgical furnace.
Subclass:
182.6
This subclass is indented under subclass 182.5. Tuyeres for a
type used in a forge and in which the direction of the air
blast is usually vertical.
SEE OR SEARCH THIS CLASS, SUBCLASS:
195 for forge furnace structure.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 6.7 for forge
tuyeres in boilers.
Subclass:
184
This subclass is indented under the class definition. Subject
matter relating to metal smokestacks of locomotives and
portable boilers.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 160+ for stacks having air jet draft
regulators.
SEE OR SEARCH CLASS:
52, Static Structures (e.g. Buildings), subclass 218, 219,
and 245+ for flues or curvilinear constructions there
provided for.
104, Railways, subclass 52 for locomotive smokejacks.
114, Ships, subclass 187 for ship smoke stacks.
454, Ventilation, subclass 2 for vehicle stacks, per se.
Subclass:
185
WITH CONTROL MEANS RESPONSIVE TO A SENSED CONDITION:
This subclass is indented under the class definition.
Apparatus provided with detection means for sensing a
particular state, property, or characteristic or a change in
the state, property, or characteristic of the apparatus or
combustion constituents or combustion products used or
produced by the apparatus and with a mechanism, actuated by
or responsive to the detection means, for regulating the
operation of the apparatus.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 191+ for apparatus under the class definition
provided with means designed to control the apparatus in a
particular mode or for a particular time duration.
SEE OR SEARCH CLASS:
236, Automatic Temperature and Humidity Regulation, for a
furnace with a control. See headnote V, B, 2 of these
definitions.
266, Metallurgical Apparatus, subclasses 78+ for
metallurgical furnaces provided with control means responsive
to a sensed condition.
373, Industrial Electric Heating Furnaces, subclasses 8+
for such furnace provided with environmental control system.
431, Combustion, subclasses 18+ for liquid or gaseous fuel
burning apparatus provided with control means responsive to a
sensed condition.
432, Heating, subclasses 36+ for apparatus for generating
heat and applying same to materials provided with control
means responsive to a sensed condition.
Subclass:
186
Feed control:
This subclass is indented under subclass 185. Apparatus
wherein the mechanism is provided for regulating the supply
of combustion constituents to the apparatus.
(1) Note. The term "combustion constituents" includes solid
fuel or combustible refuse singularly or combined with fluid
fuel as well as a noncombustible fluid such as air, water, or
steam.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 101+ for subcombination fuel feeders, per se.
103 particularly for a boiler controlled subcombination fuel
feeder.
267 for furnaces provided with means for feeding solid fuel
to same.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 449 for the
combination of boiler structure with means to control the
combustion of solid fuel and the regulation of water feed to
the boiler structure.
198, Conveyors: Power-Driven, subclass 750.1 for a
reciprocating-type conveyor provided with control means
responsive to a sensed condition; and subclass 810 for an
endless belt conveyor provided with control means responsive
to a sensed condition.
414, Material or Article Handling, subclasses 18+ for
apparatus for charging a chamber used for a heating function
provided with a control system responsive to supply or
discharge of material to the chamber.
Subclass:
187
Supplemental burner:
This subclass is indented under subclass 186. Apparatus
wherein means are provided for controlling the addition of
supplemental heat.
SEE OR SEARCH CLASS:
236, Automatic Temperature and Humidity Regulation, subclass
14 and 15 for regulation of fuel and air supply by condition
of furnace or by combined boiler and furnace.
Subclass:
188
Of noncombustible fluid; e.g., air, etc:
This subclass is indented under subclass 186. Apparatus
wherein the constituent being supplied is air, steam, or
water.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 297+ for furnace structure provided with fluid
supply means.
Subclass:
189
Pressure sensor:
This subclass is indented under subclass 188. Apparatus
wherein the sensed state, property, or characteristic is the
force per unit area existing at a point within the combustion
chamber or in fluid lines connected thereto.
SEE OR SEARCH THIS CLASS, SUBCLASS:
103 for a subcombination fuel feeder controlled by boiler
pressure.
SEE OR SEARCH CLASS:
266, Metallurgical Apparatus, subclass 89 for metallurgical
treating apparatus provided with control means responsive to
pressure variations.
431, Combustion, subclass 19 for a fluid fuel burner
provided with control means responsive to sensed pressure
within its burning chamber.
Subclass:
190
Temperature sensor:
This subclass is indented under subclass 188. Apparatus
wherein the sensed state, property, or characteristic is
sensible heat.
SEE OR SEARCH CLASS:
266, Metallurgical Apparatus, subclass 87 for metallurgical
treating apparatus provided with control means responsive to
temperature.
431, Combustion, subclass 68 for a fluid fuel burner
provided with control means responsive to temperature.
Subclass:
191
WITH PROGRAMMED OR CYCLIC CONTROL MEANS:
This subclass is indented under the class definition.
Apparatus provided with (a) means for storing coded
instructions or other data necessary to regulate the
operation of the apparatus, or (b) means repetitively
regulating the sequence of operational steps performed in or
by the apparatus.
SEE OR SEARCH CLASS:
4, Baths, Closets, Sinks, and Spittoons, subclass 111.2 for
dry closets having cyclic control means.
266, Metallurgical Apparatus, subclass 96 for a
metallurgical treating apparatus provided with programmable
control means.
431, Combustion, subclasses 18+ for a fluid fuel burner
provided with programmable control means.
432, Heating, subclasses 51+ for heating apparatus provided
with programmable control means.
Subclass:
192
Timer:
This subclass is indented under subclass 191. Apparatus
wherein means are provided to control any or all of the
operation(s) or operational step(s) of the apparatus for a
specific duration.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 285.5 for a damper
provided with a timer control means.
266, Metallurgical Apparatus, subclasses 97+ for a
metallurgical apparatus provided with a timer control means.
Subclass:
193
WITH SAFETY MEANS:
This subclass is indented under the class definition.
Apparatus provided with means to prevent direct injury to the
apparatus or to a human being.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclasses 504+ for a
boiler provided with safety devices.
266, Metallurgical Apparatus, subclass 174 for an ore
treating or metal extracting furnace provided with a safety
device; and subclass 903 for a cross-reference art collection
to safety devices.
Subclass:
194
CREMATORY:
This subclass is indented under the class definition.
Apparatus specially adapted for the burning of human corpses
or animal carcasses.
Subclass:
195
FORGE:
This subclass is indented under the class definition.
Apparatus specially adapted for building a blacksmith's fire
generally consisting of an open firepot and means for feeding
air thereto, together with other combustion features peculiar
to such an organization.
SEE OR SEARCH THIS CLASS, SUBCLASS:
182.6 for a subcombination tuyere for use in a forge
furnace.
SEE OR SEARCH CLASS:
454, Ventilation, subclasses 49+ for a hood or offtake
means for ventilating a forge furnace.
Subclass:
196
STRAW BURNER AND FEEDER:
This subclass is indented under the class definition.
Apparatus specially adapted for burning straw and the feeding
means thereof.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclasses 222-225 for burning
refuse in a domestic stove or furnace.
Subclass:
197
This subclass is indented under subclass 196. External
structure detachable from firebox: Apparatus having fireboxes
located exteriorly of the main furnace structure and capable
of being readily separated or detached therefrom.
Subclass:
198
LOCOMOTIVE:
This subclass is indented under the class definition.
Apparatus specially adapted for use with mechanical structure
movable upon a railway track and propelled by a steam
engine.
SEE OR SEARCH CLASS:
105, Railway Rolling Stock, subclasses 37+ for steam
locomotive, per se.
122, Liquid Heaters and Vaporizers, subclass 434 for boiler
water preheater combined with locomotive tender water tank.
Subclass:
199
Having noncombustible fluid feed means:
This subclass is indented under subclass 198. Apparatus
provided with means to inject air, steam, or water into a
combustion chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
297 for other types of combustion apparatus with fluid feed
means.
Subclass:
200
This subclass is indented under subclass 199. And
noncombustible fluid treatment means: Apparatus provided with
means for modifying the physical properties of the fluid
prior to its injection into the combustion chamber.
(1) Note. Physical properties include temperature,
pressure, and volume of the fluid.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 301+ for other furnace structure provided with
noncombustible fluid treatment means.
subclasses 342+ for process of treatment.
Subclass:
201
Preheater:
This subclass is indented under subclass 200. Apparatus
wherein the modifying means is provided to increase the
temperature of the fluid.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 302+ for other types of solid fuel combustion
apparatus having a preheater.
Subclass:
202
Undergrate feed:
This subclass is indented under subclass 199. Apparatus
provided with means for feeding the fluid below the
combustion reaction.
SEE OR SEARCH THIS CLASS, SUBCLASS:
312 for other combustion apparatus provided with undergrate
fluid feed means.
Subclass:
203
WITH EXHAUST GAS TREATMENT MEANS:
This subclass is indented under the class definition.
Apparatus provided with means for conditioning combustion
products subsequent to their production and prior to their
venting to the atmosphere to render them less objectionable
to the environment.
SEE OR SEARCH THIS CLASS, SUBCLASS:
345 for process of exhaust gas treatment.
SEE OR SEARCH CLASS:
266, Metallurgical Apparatus, subclasses 144+ for
metallurgical treating apparatus provided with means for
treating the exhaust fumes produced during the metallurgical
treatment.
432, Heating, subclass 66, 67+, and 72 for a heating means of
general utility provided with means for treating or handling
exhaust gases.
Subclass:
204
Recirculation means:
This subclass is indented under subclass 203. Apparatus
wherein the conditioning means returns all or part of the
products of combustion to a combustion chamber.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 79 for a heating stove
provided with means for returning the combustion products to
the combustion chamber.
266, Metallurgical Apparatus, subclass 156 for metallurgical
treating apparatus provided with exhaust gas recycling
means.
431, Combustion, subclasses 115+ for fluid fuel burners
provided with exhaust gas recirculation means.
Subclass:
205
Air supply means:
This subclass is indented under subclass 204. Apparatus
provided with means for introducing air into the combustion
products being returned to the combustion chamber.
Subclass:
206
Including pump:
This subclass is indented under subclass 205. Apparatus
provided with means for impelling the returned combustion
products into the combustion chamber.
Subclass:
207
Eductor:
This subclass is indented under subclass 206. Apparatus
wherein the impelling means is a moving stream of fluid which
mixes with and draws the returning combustion products into
the combustion chamber.
Subclass:
208
Furnace having multiple firebox:
This subclass is indented under subclass 203. Apparatus
having a plurality of combustion chambers and further
provided with means for passing combustion products from one
combustion chamber to another.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 295+ for other types of multiple firebox
combustion apparatus.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 57 and 60
provided with multipart water fireboxes provided with means
for passing combustion products from one part to the other.
Subclass:
209
By undergate means:
This subclass is indented under subclass 208. Apparatus
provided with means for passing combustion products beneath a
combustion reaction.
Subclass:
210
Afterburning means:
This subclass is indented under subclass 203. Apparatus
wherein the treating means includes means to effect
combustion of unburned components in the gaseous products of
combustion.
SEE OR SEARCH CLASS:
431, Combustion, appropriate subclass for fluid fueled
burners.
Subclass:
211
Means directing main flame or combustion products for
afterburning:
This subclass is indented under subclass 210. Apparatus
wherein means is associated with the main burner to direct a
portion of the flame into an afterburning zone spaced from
the main combustion zone or to redirect the gaseous products
of combustion through the flame of the main burner.
Subclass:
212
Liquid or gaseous fueled:
This subclass is indented under subclass 210. Apparatus
wherein an auxiliary fluid fueled burner is used to assist in
effecting combustion of unburned components in the gaseous
products of combustion.
Subclass:
213
Swirl inducing:
This subclass is indented under subclass 212. Apparatus
wherein the fluid fueled burner is arranged to induce a
turbulent or whirling motion to the products of combustion to
promote burning of the unburned components.
Subclass:
214
Including means to add air:
This subclass is indented under subclass 210. Apparatus
including means to supply air to the afterburner zone to
effect combustion of the unburned components of the gaseous
products of combustion.
Subclass:
215
This subclass is indented under subclass 203. Means
contacting exhaust gas with liquid: Apparatus including means
to commingle or otherwise encounter the gaseous products of
combustion with a liquid medium to remove impurities from the
gaseous products.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 119+ for devices for preventing live sparks from
passing out of the stack or chimney. The devices include
screens, baffles, steam, or water sprays located in smokebox
or stack.
SEE OR SEARCH CLASS:
261, Gas and Liquid Contact Apparatus, appropriate subclass
for apparatus of general utility for contacting a gas with a
liquid.
266, Metallurgical Apparatus, subclasses 146+ for
metallurgical apparatus provided with means for contacting an
exhaust gas with a liquid.
Subclass:
216
Means separating particles from exhaust gas:
This subclass is indented under subclass 203. Apparatus
including means to remove particulate matter suspended in the
gaseous products of combustion.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 119+ for devices for preventing live spark from
passing out of the stack or chimney of furnaces. The devices
include screens, baffles, steam, or water sprays located in
smokebox or stack.
SEE OR SEARCH CLASS:
96, Gas Separation: Apparatus, for apparatus for gas
separation, per se.
Subclass:
217
Outlet screen:
This subclass is indented under subclass 216. Apparatus
wherein the chimney or flue has a foraminous member for
preventing discharge of solid particles to the environment.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 119+ for means preventing live sparks from
passing out of the stack or chimney.
Subclass:
218
WITH FUEL TREATMENT MEANS:
This subclass is indented under the class definition.
Apparatus provided with means to enhance the combustible
properties of the solid fuel to be burned or refuse to be
incinerated.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 342+ for process of treatment.
Subclass:
219
Preliminary refuse treatment means:
This subclass is indented under subclass 218. Apparatus
provided with means for conditioning the refuse to be
incinerated prior to burning.
Subclass:
220
Sorter:
This subclass is indented under subclass 219. Apparatus
provided with means for separating the waste material on the
basis of some physical characteristic.
(1) Note. Some of the physical characteristics upon which
the material is separated are size, magnetic properties,
removal of liquid.
SEE OR SEARCH CLASS:
209, Classifying, Separating, and Assorting Solids,
appropriate subclasses for sorting or separating solid
materials, per se, and subclass 11 for sorting or separating
solid materials combined with heat treatment.
210, Liquid Purification or Separation, appropriate subclass
for separation from a liquid of any character of material.
Subclass:
221
Dewatering:
This subclass is indented under subclass 220. Apparatus
having means for removing liquid from the refuse.
(1) Note. The devices of this subclass are provided with
means which effect the physical separation of solids and
water, as for example, centrifuges, strainers, skimming
devices, etc. Those devices which merely heat a watery mass
to evaporate the water contained therein will not be found in
this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 224+ for devices which drive water from a wet
mass by the application of heat thereto.
SEE OR SEARCH CLASS:
210, Liquid Purification or Separation, appropriate
subclasses for liquid purifiers and separators.
Subclass:
222
Comminutor:
This subclass is indented under subclass 219. Apparatus
provided with means for breaking up or reducing in size the
waste material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
106 for fuel feeders having blowers combined with
pulverizers.
SEE OR SEARCH CLASS:
241, Solid Material Comminution or Disintegration,
appropriate subclass for comminuting or disintegrating
apparatus, per se, or combined with heating means where no
chemical change to the material heated occurs.
Subclass:
223
Compactor:
This subclass is indented under subclass 219. Apparatus
provided with means for condensing or densifying the waste
material.
SEE OR SEARCH CLASS:
100, Presses, appropriate subclasses for press structure, per
se, and subclasses 92+ for press combined with heating
means for drying without producing incineration.
Subclass:
224
Dryer:
This subclass is indented under subclass 219. Apparatus
provided with means for driving off moisture from the waste
material by heating the material prior to delivery to an
incineration zone.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, appropriate
subclass for methods and apparatus not provided for elsewhere
for removing excess or unwanted moisture from solid
materials. Further, see the search note in the class
definitions of Class 34 for a statement of the line between
Class 34 and Class 110.
266, Metallurgical Apparatus, subclass 175 for means to
preheat or to dry a charge prior to its entry into a
metallurgical furnace.
Subclass:
225
Furnace with multiple hearth:
This subclass is indented under subclass 224. Apparatus
provided with plural drying means wherein the refuse is moved
progressively from one drying zone to another.
Subclass:
226
Rotary drum type:
This subclass is indented under subclass 224. Apparatus
wherein the means to drive off the moisture includes a
barrel-like receptacle which is mounted to revolve about its
longitudinal axis while the material is being dried.
SEE OR SEARCH THIS CLASS, SUBCLASS:
246 for incinerating apparatus employing rotary drum-type
structure.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclasses
130+ for rotary drum-type driers.
266, Metallurgical Apparatus, subclass 173 for rotary drum
preheating or drying apparatus.
Subclass:
227
Having means to effect or facilitate refuse movement:
This subclass is indented under subclass 224. Apparatus
having means to either cause or to aid in the passage of the
material being treated from a drying zone to a combustion
zone.
Subclass:
228
Mechanical conveying means:
This subclass is indented under subclass 227. Apparatus
wherein the means to cause or to aid in the passage of the
material includes a power-driven conveyor.
SEE OR SEARCH CLASS:
198, Conveyors: Power-Driven, subclasses 618+ for a
conveyor of general utility.
414, Material or Article Handling, subclasses 147+ for an
apparatus for charging a chamber used for a heating function
other than incineration.
Subclass:
229
Means for liberating gas from solid fuel:
This subclass is indented under subclass 218. Apparatus
wherein the means produces a combustible fluid from the solid
fuel.
SEE OR SEARCH CLASS:
48, Gas: Heating and Illuminating, subclasses 61+ for a
gas producer, per se, in which the produced or liberated gas
is not burned during its production, and subclass 113 for a
gas generator of the furnace retort type.
60, Power Plants, subclass 39.12 for a combustion products
generator provided with means to produce a combustible gas
which is subsequently delivered to and burned in the
generator.
122, Liquid Heaters and Vaporizers, subclass 5 for the
combination of boiler structure intimately related with a gas
producer.
Subclass:
230
Coking means:
This subclass is indented under subclass 229. Apparatus
provided with means to separate or eliminate the combustible
fluid from the solid fuel such that the distilled fuel is
mainly consumed within the combustion chamber.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 66 for a boiler
combined with a water cooled coking chamber.
Subclass:
231
Undergrate:
This subclass is indented under subclass 230. Apparatus
provided with means to pass the separated fluid under the
fuel supporting means and through a combustion reaction.
Subclass:
232
Means for pulverizing solid fuel:
This subclass is indented under subclass 218. Apparatus
wherein the means is capable of comminuting or disintegrating
solid lump fuel into powdered fuel for use in a powdered fuel
burner.
SEE OR SEARCH THIS CLASS, SUBCLASS:
222 for a comminutor for disintegrating waste material
combined with an incinerator.
SEE OR SEARCH CLASS:
241, Solid Material Comminution or Disintegration,
appropriate subclasses for comminuting or disintegrating
apparatus, per se, or combined with heating means where no
chemical change to the heated material occurs.
Subclass:
233
COMBINED:
This subclass is indented under the class definition.
Apparatus including means in addition to the incinerating or
burning apparatus for performing some additional
nonincinerating or nonburning function or for perfecting the
operation of the basic incinerating or burning apparatus not
provided for in another class.
(1) Note. See headnote V, Relationship to Combination
Classes, of these (Class 110) definitions for structure of
another class combined with a Class 110, Furnaces.
SEE OR SEARCH CLASS:
15, Brushing, Scrubbing, and General Cleaning, subclass 4
for combined cleaning and incineration.
71, Chemistry: Fertilizers, subclasses 11+ for the making
of fertilizer from refuse material.
100, Presses, subclasses 92+ for compacting combined with
heating means for drying without incineration.
126, Stoves and Furnaces, subclass 224 and 225 for refuse
burners structurally related to cooking or heating stoves.
266, Metallurgical Apparatus, appropriate subclass for the
recovery of metals from refuse material. Where a number of
diverse constituents are reclaimed; e.g., glass and lead,
etc., classification is in this (110) class.
Subclass:
234
With boiler:
This subclass is indented under subclass 233. Apparatus
wherein the addition apparatus is a liquid heater or
vaporizer.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 2 for
significant boiler structure combined with an incinerator or
solid fuel burning apparatus.
Subclass:
235
REFUSE INCINERATOR:
This subclass is indented under the class definition.
Apparatus specially adapted for burning waste material.
(1) Note. Includes apparatus for the destruction by burning
of unwanted materials which materials include solids,
liquids, or mixtures thereof.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 224 for a domestic stove
or furnace which uses garbage or refuse as fuel.
Subclass:
236
Means for cleaning by combustion:
This subclass is indented under subclass 235. Apparatus
including means to effect the burning of the unwanted waste
material from a salvable item.
(1) Note. Examples of devices to be found herein are
incinerators to burn the upholstery from car bodies, means to
burn insulation from wires, etc.
SEE OR SEARCH CLASS:
134, Cleaning and Liquid Contact With Solids, subclasses 1+
and especially subclasses 19+ for methods of cleaning
salvable objects by combustion.
Subclass:
237
For explosive or radioactive material:
This subclass is indented under subclass 235. Apparatus
specially adapted to burn radioactive or explosive waste
material.
Subclass:
238
For liquid refuse:
This subclass is indented under subclass 235. Apparatus
specially adapted for the burning of liquid waste material.
SEE OR SEARCH CLASS:
431, Combustion, appropriate subclass for apparatus for
burning fluid fuels.
Subclass:
239
For stump in situ:
This subclass is indented under subclass 235. Apparatus
specially adapted for burning stumps of trees in their
original place.
(1) Note. Generally the apparatus is in the form of a hood
enclosing the stump.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 271.3 for solid fuel
furnaces for thawing frozen earth.
Subclass:
240
Vehicle mounted:
This subclass is indented under subclass 235. Apparatus
wherein the incinerator is mounted on an ambulant structure.
Subclass:
241
Portable:
This subclass is indented under subclass 235. Apparatus
wherein the incinerator is constructed to be readily
transported from place to place.
Subclass:
242
Closed vessel:
This subclass is indented under subclass 235. Apparatus
wherein the incinerator is a sealed container into which the
refuse is placed and incinerated over the fire.
(1) Note. The vessel may or may not have means for dumping
its contents on the fire.
SEE OR SEARCH CLASS:
48, Gas: Heating and Illuminating, subclasses 119+ for
retorts pertinent to that class.
202, Distillation: Apparatus, subclasses 86+, 96+, 105+, and
217+ for distillation retorts.
Subclass:
243
Refuse suspended in or supported by a fluid medium:
This subclass is indented under subclass 235. Apparatus
wherein the incinerator consists of means by which the
material to be incinerated either floats on the surface of a
body of liquid or is carried within and by a moving stream of
gas during its incineration.
Subclass:
244
Suspended in a gaseous medium:
This subclass is indented under subclass 243. Apparatus
wherein the incinerator consists of means by which the
material to be incinerated is carried within and by a moving
stream of gas during its incineration.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 261+ and 263+, for fine fuel burned in
suspension.
Subclass:
245
Fluidized bed of noncombustible particles:
This subclass is indented under subclass 244. Apparatus
wherein the incinerator consists of means by which a
distinct, flowable stratum of nonburnable particulate matter
is formed in the combustion zone by the action of gas passing
upwardly through the stratum.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclasses
576+ for fluid current conveying of treated material.
432, Heating, subclass 215 for a residual work tumbling-type
or work heating furnace utilizing a solid fluent heat
carrier.
Subclass:
246
Rotary drum:
This subclass is indented under subclass 235. Apparatus
wherein the incinerator is a barrellike receptacle within
which the refuse material is placed, which receptacle is
mounted to revolve about its longitudinal axis during
incineration.
SEE OR SEARCH CLASS:
432, Heating, subclasses 103+ for a residual work
tumbling-type heating furnace.
Subclass:
247
This subclass is indented under subclass 235. Rotary grate
movable about a vertical axis: Apparatus wherein the
incinerator has a grate that revolves about an axis which is
generally normal to the horizon upon which grate the refuse
is supported.
SEE OR SEARCH THIS CLASS, SUBCLASS:
275 for a rotary grate movable about a vertical axis for
burning solid fuels other than refuse.
SEE OR SEARCH CLASS:
198, Conveyors: Power-Driven, subclass 803.16 for a
power-driven rotary conveyor, per se.
Subclass:
248
Refuse supported above grate:
This subclass is indented under subclass 235. Apparatus
wherein the incinerator has means to support the refuse over
the grate in spaced relation thereto, which means allows for
circulation of air through the refuse.
Subclass:
249
Reverberatory type:
This subclass is indented under subclass 235. Apparatus
wherein the incinerator has means to shield the refuse over
which the flames of the furnace pass to consume the refuse.
SEE OR SEARCH THIS CLASS, SUBCLASS:
224 for similar structure wherein the refuse is dried on a
platform or shelf and then transferred to the incineration
zone.
Subclass:
250
With electric heater:
This subclass is indented under subclass 235. Apparatus
including electrical heating means to assist or perform
incineration of the refuse.
SEE OR SEARCH CLASS:
4, Baths, Closets, Sinks, and Spittoons, subclass 111.5 for
dry closets having electric heating means.
219, Electric Heating, appropriate subclass for electric
heating structure.
Subclass:
251
Including air supply means extending vertically within
refuse:
This subclass is indented under subclass 235. Apparatus
having means extending upwardly within a mass of the refuse
to supply air thereto.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 297+ for means feeding air to firebox of a solid
fuel furnace.
Subclass:
252
With supplementary burner:
This subclass is indented under subclass 251. Apparatus
including a burner for discharging hot gases or flames
vertically into the mass of refuse.
Subclass:
253
With means shielding burner from refuse:
This subclass is indented under subclass 235. Apparatus
including means to prevent refuse from clogging or effecting
operation of the burner.
Subclass:
254
With air preheater:
This subclass is indented under subclass 235. Apparatus
including means to raise the temperature of air being
delivered to the combustion chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
201 for a locomotive-type furnace provided with a
noncombustible fluid preheater.
302 for a furnace for burning solid fuel other than refuse
provided with a noncombustible fluid preheater.
Subclass:
255
With means for advancing or handling refuse or residue:
This subclass is indented under subclass 235. Apparatus
including similar means for feeding, conveying, or agitating
refuse to or within the combustion chamber or for discharging
ash from the chamber, without particular heating or
combustion chamber structure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 101+ for subcombination solid fuel feeding
means.
subclasses 267+ for a furnace for burning solid fuel other
than refuse provided with means to feed the fuel to the
furnace.
SEE OR SEARCH CLASS:
198, Conveyors: Power-Driven, appropriate subclasses for
conveyor structures.
414, Material or Article Handling, subclasses 147+ for
feeding, conveying, or agitating refuse to or within the
combustion chamber or for discharging ash from the chamber.
Without particular or combustion chamber structure.
Subclass:
256
Means for feeding through chimney:
This subclass is indented under subclass 255. Apparatus
having means to deliver the refuse through the chimney or
offtake flue to the combustion chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 116+ for chute feeding means for solid fuel
furnace.
SEE OR SEARCH CLASS:
193, Conveyors, Chutes, Skids, Guides, and Ways, appropriate
subclass for chute feeding means.
Subclass:
257
Continuous advance:
This subclass is indented under subclass 235. Apparatus
having mechanical means to cause or aid in continuous
movement of refuse through the furnace.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 267+ for progressive feed of solid fuel.
Subclass:
258
Refuse agitating:
This subclass is indented under subclass 255. Apparatus
having means within the combustion chamber to stir or shake
the burning mass of refuse.
SEE OR SEARCH THIS CLASS, SUBCLASS:
247 for agitators combined with a rotary grate, vertical
axis.
Subclass:
259
Residue handling; e.g., ash, etc.:
This subclass is indented under subclass 255. Apparatus for
receiving or removing the spent solid products of combustion
from the incinerator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 165+ for ash receiving and handling for a
pulverized fuel furnace provided with residue handling
means.
266 for a pulverized fuel furnace provided with residue
handling means.
Subclass:
260
INCLUDING FLUID FUEL BURNER:
This subclass is indented under the class definition.
Apparatus provided with means for burning solid fuel and
liquid or gaseous fuel.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 22 for a
combined boiler with a solid and fluid fuel furnace, and
subclass 211 for a sectional boiler combined with a solid and
fluid fuel furnace.
126, Stoves and Furnaces, subclass 36 for a culinary heating
stove, and subclass 116 for a combined coal and liquid or
gaseous fueled hot air furnace.
266, Metallurgical Apparatus, subclasses 74+ for fluid fuel
outing apparatus provided with means for feeding solid
material for enhancing the cutting operation.
431, Combustion, subclasses 159+ for a fluid fuel burner
provided in a combustion furnace.
Subclass:
261
Powdered solid fuel:
This subclass is indented under subclass 260. Apparatus
capable of burning pulverized solid fuel.
SEE OR SEARCH THIS CLASS, SUBCLASS:
104 for a subcombination blower-type fuel feeder.
233 for furnace structure combined with solid fuel
pulverizing means.
subclasses 263+ for a pulverized fuel furnace adapted to
burn only solid pulverized fuel.
347 for process of pulverized fuel combustion.
SEE OR SEARCH CLASS:
60, Power Plants, subclass 39.461 for a power plant using
combustion products as a motive fluid adapted to use powdered
fuel.
148, Metal Treatment, subclasses 9+ for fluid fuel metal
cutting apparatus provided with means to feed adjuvant
powder.
239, Fluid Sprinkling, Spraying, and Diffusing, especially
subclasses 79+ and 336 for a fluid distributor, per se,
which may include means to mix a plurality of fluents, one of
which may be a fluent solid; see search note to Class 239 in
the Class 431 class definition for the line between those
classes.
241, Solid Material Comminution or Disintegration,
appropriate subclass for comminuting or disintegrating
apparatus, per se, or combined with heating means where no
chemical change to the heated material occurs.
431, Combustion, subclass 173 for fluid fuel burner provided
in a combustion furnace wherein the fuel is fed into a
circular chamber substantially tangentially to the wall of
the chamber.
Subclass:
262
Alternate fuel:
This subclass is indented under subclass 261. Apparatus
wherein the apparatus is capable of burning either powdered
solid fuel or fluid fuel.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 22 for a boiler
which can be alternately heated by solid or fluid fuel, and
subclass 211 for a sectional boiler which can be alternately
heated by solid or fluid fuel.
Subclass:
263
UTILIZING POWDERED FUEL:
This subclass is indented under the class definition.
Apparatus provided with means for burning pulverized solid
fuel which has been suspended in air such that the burning
occurs as the fuel remains so suspended.
SEE OR SEARCH THIS CLASS, SUBCLASS:
104 for a subcombination blower-type fuel feeder.
232 for furnace structure combined with solid fuel
pulverizing means.
261 for powdered fuel furnace structure provided with a
fluid fuel burner.
347 for process of fluidized fuel combustion.
SEE OR SEARCH CLASS:
60, Power Plants, subclass 39.461 for a power plant using
combustion products as a motive fluid adapted to use powdered
fuel.
241, Solid Material Comminution or Disintegration,
appropriate subclass for comminuting or disintegrating
apparatus, per se, or combined with heating means where no
chemical change to the heated material occurs.
431, Combustion, subclass 173 for fluid fuel burner provided
in a combustion furnace wherein the fuel is fed into a
circular chamber substantially tangentially to the wall of
the chamber.
Subclass:
264
Having rotary flow means:
This subclass is indented under subclass 263. Apparatus
provided with vane or vanelike structure through which the
pulverized fuel and air mixture is caused to flow into the
combustion chamber thereby producing a rotary flow of the
mixture.
SEE OR SEARCH THIS CLASS, SUBCLASS:
213 for an incinerator or solid fuel furnace provided with a
liquid or gaseous fuel swirl inducing after-burner.
SEE OR SEARCH CLASS:
431, Combustion, subclasses 173+ for fluid fuel circular
combustion furnace structure in which the fuel is fed
tangentially into the furnace.
Subclass:
265
Having secondary air mixing means:
This subclass is indented under subclass 263. Apparatus
provided with variable control means to intermingle the
suspended pulverized fuel with air other than that used to
suspend the fuel to thereby produce a desired air-fuel
mixture.
Subclass:
266
With residue handling means (e.g., ash, etc.):
This subclass is indented under subclass 263. Apparatus
further provided with means to remove or dispose of the solid
or liquid waste produced by the combustion of the pulverized
solid fuel.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 165+ for subcombination ash receiving and
handling devices.
259 for residue handling combined with incinerator
structure.
subclasses 342+ for process of treatment.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 242 for domestic stoves
and furnaces provided with means for the removal and
collection of ashes.
414, Material or Article Handling, subclasses 209+ for a
discharging device of a chamber used for a heating function.
Subclass:
267
INCLUDING MEANS TO FEED SOLID FUEL:
This subclass is indented under the class definition.
Apparatus provided with means for conveying lump combustible
material to the combustion chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 101+ for subcombination fuel feeder structure.
subclasses 186+ for solid fuel feed means combined with
control means responsive to a sensed condition.
subclasses 255+ for refuse feed means combined with
incinerator structure.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 376 for boiler
structure provided with means for feeding fuel along a water
cooled grate.
266, Metallurgical Apparatus, subclasses 176+ for ore
treating or metal extracting means provided with means for
moving the material being treated through a heating zone.
414, Material or Article Handling, subclasses 147+ for a
driven means for charging a chamber used for a heating
function.
432, Heating, subclass 121 for a heating chamber provided
with means for moving work therethrough, and subclasses 239+
for a feeding or conveying subcombination specialized for
heating.
Subclass:
268
Movable grate:
This subclass is indented under subclass 267. Apparatus
wherein the fuel conveying means in an ambulatory perforated
plate or bar structure which also supports the fuel during
the burning.
SEE OR SEARCH THIS CLASS, SUBCLASS:
328 for a grate element, per se.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclasses 152+ for grate
structure specialized for use with a domestic furnace, stove,
or range.
266, Metallurgical Apparatus, subclasses 178+ for ore
treating or metal extracting apparatus provided with a
traveling grate.
Subclass:
269
Endless chain:
This subclass is indented under subclass 268. Apparatus
wherein the movable grate is composed of an assemblage of
link sections attached together to form a beltlike conveyor
structure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
329 for endless chain element, per se, or for an assemblage
of endless chain elements not claimed with other furnace
structure.
SEE OR SEARCH CLASS:
198, Conveyors: Power-Driven, subclasses 804+ for endless
conveyor structure, per se.
414, Material or Article Handling, subclass 157 and 196 for
a merely named heating chamber structure combined with
endless conveyor charging means.
Subclass:
270
Including air supply means:
This subclass is indented under subclass 269. Apparatus
provided with means for introducing air to the endless chain
grate to thereby promote and support the burning of the fuel
on the grate.
SEE OR SEARCH THIS CLASS, SUBCLASS:
348 for process of fluid feed.
Subclass:
271
And chain seal:
This subclass is indented under subclass 270. Apparatus
further provided with means contiguous to and communicating
with the chain grate to prevent the escape of supplied air or
burning gases associated with the burning fuel.
SEE OR SEARCH CLASS:
266, Metallurgical Apparatus, subclass 179 for an ore
treating or metal extracting apparatus provided with a
traveling grate having seal means.
432, Heating, subclass 242 for subcombination feeding or
conveying structure provided with means to seal the opening
by which the work is moved into the chamber, or subclass 244
for preventing leakage through the chamber wall.
Subclass:
272
Between runs:
This subclass is indented under subclass 209. Apparatus
wherein the seal means is located either within the interior
or contiguous to a longitudinal side of the endless grate.
Subclass:
273
Inclined run:
This subclass is indented under subclass 269. Apparatus
provided with means to vertically dispose one end of the
chain grate so that the longitudinal axis of the grate is at
an angle with the horizon.
Subclass:
274
Mobile support:
This subclass is indented under subclass 269. Apparatus
wherein the grate rests upon an ambulatory structure capable
of allowing the entire grate to be moved as an entity with
respect to the remainder of the combustion apparatus.
Subclass:
275
Rotary:
This subclass is indented under subclass 268. Apparatus
wherein the grate or grate element is movable about its
longitudinal axis and further wherein the fuel is fed onto
the top of the grate or grate element.
SEE OR SEARCH THIS CLASS, SUBCLASS:
247 for a combination of a refuse incinerator provided with
a vertical axis rotary grate.
SEE OR SEARCH CLASS:
198, Conveyors: Power-Driven, subclass 803.16 for a rotary
conveyor, per se.
Subclass:
276
About horizontal axis:
This subclass is indented under subclass 275. Apparatus
wherein the axis of the rotary grate is at a right angle to
plumb line.
SEE OR SEARCH THIS CLASS, SUBCLASS:
246 for an incinerator provided with a rotary drum movable
on a horizontal axis for processing refuse.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 181 for domestic furnace,
stove, or range grate horizontally pivoted and capable of
rotary motion.
Subclass:
277
Conical type:
This subclass is indented under subclass 275. Apparatus
wherein the rotary grate is in the shape of a pyramid having
a circular base.
(1) Note. The grate may be either of an upright or an
inverted cone shape.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 287+ for similar stationary inverted
frustoconical grate structure.
Subclass:
278
Oscillatory:
This subclass is indented under subclass 268. Apparatus
wherein the grate or grate element is fixed at a fulcrum
point and capable of moving alternately backward and forward
thereby advancing the fuel along the grate.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclasses 170+ for grate
structure for domestic stoves and furnaces capable of moving
in a to-and-fro motion.
Subclass:
279
Manual actuation means:
This subclass is indented under subclass 278. Apparatus
further provided with means for producing the oscillatory
motion by human hand motion.
Subclass:
280
Multiple retort:
This subclass is indented under subclass 278. Apparatus
provided with plurality of grate assemblages.
Subclass:
281
Reciprocatory:
This subclass is indented under subclass 268. Apparatus
wherein the grate or grate elements are mounted for linear
alternate back and forth motion.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 174 for a domestic
furnace, stove, or range grate capable of a horizontal
to-and-fro movement.
198, Conveyors: Power-Driven, subclasses 750+ for a
reciprocating conveying surface, per se.
Subclass:
282
Including power feed:
This subclass is indented under subclass 281. Apparatus
further provided with fuel supply means driven by mechanical
device for feeding the fuel from a supply hopper to the
reciprocating moving grate.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 286+ for a stationary grate provided with
conveyor means.
289 particularly for a push ram-type feed conveyor.
SEE OR SEARCH CLASS:
198, Conveyors: Power-Driven, subclass 657 for power-driven
conveyors, per se, of similar structure.
266, Metallurgical Apparatus, subclass 183 for ore treating
or metal extracting means provided with power-driven
conveying means.
414, Material or Article Handling, subclasses 187+ for a
merely named heating chamber provided with a hopper and a
power-driven conveyor charging means.
Subclass:
283
UNDERFEED:
This subclass is indented under subclass 282. Apparatus
wherein the fuel supply means lies in a plane below the
topmost point of the grate structure.
Subclass:
284
Power feed perpendicular to grate:
This subclass is indented under subclass 283. Apparatus
wherein the power feed means is at a right angle to the axis
of the reciprocating motion of the grate.
SEE OR SEARCH THIS CLASS, SUBCLASS:
289 for a pusher ram feed means perpendicular to a static
grate.
Subclass:
285
Raking bar type:
This subclass is indented under subclass 268. Apparatus
wherein the movable grate is composed of relatively long
evenly shaped pieces of metal interposed with similar
stationary metal pieces such that the movable grate produces
a raking action to advance the fuel.
Subclass:
286
Power driven:
This subclass is indented under subclass 267. Apparatus
wherein the fuel conveying means is a machine propelled by
mechanical energy.
(1) Note. The term mechanical energy is to be distinguished
from hand labor as being produced from a variety of
electrical or mechanical motors or engines.
SEE OR SEARCH CLASS:
198, Conveyors: Power-Driven, subclass 657 for power-driven
conveyors, per se, of similar structure.
266, Metallurgical Apparatus, subclass 183 for ore treating
or metal extracting means provided with power-driven
conveying means.
414, Material or Article Handling, subclasses 147+ for a
merely named heating chamber provided with a power-driven
conveyor charging means.
Subclass:
287
Having circular grate:
This subclass is indented under subclass 286. Apparatus
provided with a fuel supporting means which is round in
structure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
277 for similar inverted frustoconical rotary grate
structure with or without forced air means.
Subclass:
288
And forced air supply:
This subclass is indented under subclass 287. Apparatus
further provided with air fan impeller means for feeding air
to the circular grate.
SEE OR SEARCH THIS CLASS, SUBCLASS:
348 for process of fluid feed.
Subclass:
289
Pusher ram:
This subclass is indented under subclass 286. Apparatus
wherein the fuel supply means includes a fuel engaging means
and means to cause the engaging means to move alternately to
and fro along a straight line from a fuel engaging point to a
fuel releasing point.
SEE OR SEARCH CLASS:
414, Material or Article Handling, subclass 198 for a merely
named heating chamber provided with a reciprocating pusher
type charging means.
Subclass:
290
Parallel to grate:
This subclass is indented under subclass 289. Apparatus
provided with a fuel supporting means composed of an
assemblage of elements the longitudinal axis of which is
parallel to the axis of the straight line movement of the
fuel supply means.
(1) Note. The assemblage of grate elements comprises what
is generally known in the solid fuel furnace art as a fuel
retort.
Subclass:
291
Inclined step grate:
This subclass is indented under subclass 290. Apparatus
wherein the grate assemblage is composed such that the
elements overlap one another in a descending configuration
thereby producing a steplike structure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
328 for a grate element, per se.
Subclass:
292
Separate feed:
This subclass is indented under subclass 267. Apparatus
provided with means to supply the fuel in discrete separate
quantities.
SEE OR SEARCH CLASS:
414, Material or Article Handling, subclasses 147+ for a
merely named heating chamber provided with discrete quantity
charging means.
Subclass:
293
Supply hopper; e.g., magazine, etc.:
This subclass is indented under subclass 267. Apparatus
wherein the feed means is of the chute type such that the
fuel is fed to the combustion chamber by its own weight.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 30 for a boiler
provided with a fuel magazine.
126, Stoves and Furnaces, subclass 7, 10, 11, 68, 73, and 74
for stoves having magazine fuel feed.
Subclass:
294
Cage grate:
This subclass is indented under subclass 293. Apparatus
wherein the lower part of the magazine has perforations or
bars on opposite sides such that air may enter one side of
the burning fuel and flames may pass out of the other.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 373 for boilers
with water cage grates.
Subclass:
295
HAVING MULTIPLE FIREBOX:
This subclass is indented under the class definition.
Apparatus provided with more than one combustion chamber.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 57 and 60 for
similar structure in fire tube boilers.
Subclass:
296
Including fluid supply means:
This subclass is indented under subclass 295. Apparatus
provided with means to supply air, steam, or water to a
combustion chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 188+ for a furnace provided with noncombustible
fluid feed means provided with control means responsive to a
sensed condition.
348 for process of fluid feed.
Subclass:
297
INCLUDING NONCOMBUSTIBLE FLUID SUPPLY MEANS:
This subclass is indented under the class definition.
Apparatus provided with means to inject a noncombustible gas
or liquid into a combustion chamber to thereby promote or
support the combustion reaction.
SEE OR SEARCH THIS CLASS, SUBCLASS:
348 for process of fluid feed.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 70 for boiler
structure provided with an air feeding conduit.
126, Stoves and Furnaces, subclass 78 for a heating stove
provided with a steam feeding device.
266, Metallurgical Apparatus, subclasses 186+ for ore
treating or metal extracting apparatus provided with means
for feeding fluids.
Subclass:
298
Hollow grate:
This subclass is indented under subclass 297. Apparatus
wherein the fluid supply means is composed of a mechanical
structure provided with an internal closed cavity for
allowing the fluid to pass therethrough such that mechanical
structure is additionally used to support the fuel during
combustion.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 232 for a
sectional boiler provided with a water grate; and subclasses
371+ for a boiler with a water grate.
126, Stoves and Furnaces, subclasses 152+ for a grate for a
furnace, stove, or range.
Subclass:
299
Having flow controller:
This subclass is indented under subclass 298. Apparatus
provided with means to directly modify the direction,
velocity, or pressure of the fluid through the hollow grate.
SEE OR SEARCH CLASS:
266, Metallurgical Apparatus, subclass 187 for an ore
treating or metal extracting apparatus provided with flow
regulated fluid feed means.
Subclass:
300
For forced air supply:
This subclass is indented under subclass 299. Apparatus
wherein the flow control means is an impeller fan.
Subclass:
301
Having treatment means:
This subclass is indented under subclass 297. Apparatus
provided with means to modify the physical properties of the
fluid passing into the combustion chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
200 for a locomotive-type furnace provided with
noncombustible fluid treatment means.
subclasses 342+ for process of treatment.
Subclass:
302
Preheater:
This subclass is indented under subclass 301. Apparatus
wherein the modifying means increases the temperature of the
fluid prior to entering the combustion chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
201 for a locomotive-type furnace provided with a
preheater.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 15 for a culinary heating
apparatus provided with a preheater, subclass 58 for a
heating stove provided with a preheater, and subclass 112 for
a hot air furnace provided with a preheater.
266, Metallurgical Apparatus, subclasses 138+ for a
metallurgical apparatus provided with means to preheat a gas
or vapor supplied to the apparatus.
432, Heating, subclasses 78+ for a heating apparatus
provided with means to heat incoming air.
Subclass:
303
And furnace gas mixer:
This subclass is indented under subclass 302. Apparatus
further provided with means to intermingle the incoming fluid
with gases rising from the combustion of the fuel.
Subclass:
304
Remote from combustion chamber:
This subclass is indented under subclass 302. Apparatus
wherein the preheater is located such that it receives its
heat from the combustion chamber exhaust gases, but the
preheater is external to the combustion chamber.
SEE OR SEARCH CLASS:
432, Heating, subclasses 179+ for a heated work chamber
provided with exhaust preheater means.
Subclass:
305
Bridgewall:
This subclass is indented under subclass 302. Apparatus
further provided with a hollow barrier structure located at
the rear of the fire grate attached to the preheater such
that the heated fluid enters the combustion reaction from
barrier structure.
Subclass:
306
Water or steam:
This subclass is indented under subclass 302. Apparatus
wherein the fluid being injected into the combustion chamber
is water in either its liquid or gaseous state.
Subclass:
307
Below grate:
This subclass is indented under subclass 306. Apparatus
wherein the water or steam is fed below the fuel supporting
means.
Subclass:
308
Internal to or attachable to wall:
This subclass is indented under subclass 302. Apparatus
wherein the preheater means is located on the interior of or
is contiguous to a sidewall of the combustion chamber.
Subclass:
309
And flow modifying means:
This subclass is indented under subclass 301. Apparatus
further provided with means to modify the course of the fluid
through the combustion chamber.
Subclass:
310
Deflector:
This subclass is indented under subclass 309. Apparatus
wherein the flow modifying means is in the form of a plate or
sheet for diverting the fluid.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 322+ for deflector element, per se.
Subclass:
311
Grate mounted:
This subclass is indented under subclass 310. Apparatus
wherein the deflector is attached to or substantially
contiguous to the fuel supporting means.
Subclass:
312
Below grate:
This subclass is indented under subclass 311. Apparatus
wherein the deflector is located below the grate.
SEE OR SEARCH THIS CLASS, SUBCLASS:
202 for noncombustible fluid feed means in a locomotive
wherein the fluid is fed below the grate.
Subclass:
313
Feed nozzle:
This subclass is indented under subclass 309. Apparatus
wherein the flow modifying means is a terminal shaping
outlet.
SEE OR SEARCH CLASS:
239, Fluid Sprinkling, Spraying, and Diffusing, appropriate
subclass for fluid spraying or diffusing nozzle, per se.
Subclass:
314
Supplying through hollow bridgewall:
This subclass is indented under subclass 297. Apparatus
provided with a vertical barrier structure at the rear of the
firebox having a substantially closed cavity through which
the fluid may pass into the combustion chamber.
Subclass:
315
DOWNDRAFT:
This subclass is indented under the class definition.
Apparatus provided with a grate and further having means to
cause the incoming air to flow down through the fuel and
grate.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 76 for a downdraft
domestic heating stove.
Subclass:
316
Grateless:
This subclass is indented under subclass 315. Apparatus
wherein the fuel support means is the solid unperforated
bottom of the combustion chamber.
Subclass:
317
INCLUDING FIREBOX:
This subclass is indented under the class definition.
Apparatus relating to combustion chamber construction.
Subclass:
318
Having arch:
This subclass is indented under subclass 317. Apparatus
provided with structure specifically provided to reflect heat
or combustion products in a desired direction or to a desired
area.
Subclass:
319
And flame shaper:
This subclass is indented under subclass 318. Apparatus
provided with means having a series of relatively small
openings designed to contour and direct the combustion flames
onto the structure desired to be heated.
(1) Note. The flame shaper is generally located at the rear
of the combustion chamber and usually designed to heat the
water boiler tubes of a boiler heating system.
Subclass:
320
Adjustable dimension firebox:
This subclass is indented under subclass 318. Apparatus
provided with means to vary the size of the combustion
chamber either by a vertically movable grate, a movable
bridgewall, or a movable dead plate which can vary the
effective area of the grate surface.
Subclass:
321
Door arch:
This subclass is indented under subclass 318. Apparatus
wherein the arch extends from the front of the combustion
chamber over the combustion reaction.
Subclass:
322
BAFFLE OR HEAT RETAINER STRUCTURE:
This subclass is indented under the class definition.
Structure relating to construction specially designed or
provided for to either reflect or retard heat.
(1) Note. The baffle or heat retainer is generally provided
for use with boiler water tubes.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 503 for boiler
structure combined with furnace having a water-cooled baffle
for receiving the impact of burning fuel.
432, Heating, subclass 249 for heat shielding means for
protecting the work or work area.
Subclass:
323
Refractory type:
This subclass is indented under subclass 322. Structure
wherein the baffle or retainer is composed of a ceramic or
ceramic-like material which is resistant to high temperatures
and large quantities of heat.
Subclass:
324
Having concavity for engaging pipe exterior:
This subclass is indented under subclass 323. Structure
wherein the refractory structure is provided with a
negatively curved area adapted to mate with the external
surface of a boiler tube.
Subclass:
325
And structure to bridge pipes:
This subclass is indented under subclass 324. Structure
wherein the refractory structure is further provided with a
second concavity such that refractory structure
simultaneously engages two separate boiler water tubes.
Subclass:
326
Metallic type:
This subclass is indented under subclass 322. Structure
wherein the baffle or retainer is composed of metal.
Subclass:
327
SOLID FUEL FEED STRUCTURE:
This subclass is indented under the class definition.
Structure relating to a component of an apparatus, device, or
mechanism used to supply either fluid or solid fuel to a
combustion chamber of the class.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 186+ for furnace feed means provided with
control means responsive to a sensed condition.
267 for feed means combined with furnace structure.
Subclass:
328
Movable grate:
This subclass is indented under subclass 327. Structure
relating to a solid fuel feed component which additionally
supports the fuel during burning.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclasses 155+ for movable grate
structures for a domestic furnace, stove, or range.
Subclass:
329
Endless chain:
This subclass is indented under subclass 328. Structure
relating to endless conveyor component.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 269+ for an endless belt feed grate combined
with furnace structure.
Subclass:
330
Having sprocket drive:
This subclass is indented under subclass 329. Structure
provided with a wheel structure provided with projections on
its periphery such that the projections engage chain links to
thereby impel the chain.
Subclass:
331
ARCH OR ROOF STRUCTURE:
This subclass is indented under the class definition.
Structure relating to combustion chamber ceiling construction
provided to reflect and direct combustion gases and heat back
to the burning fuel to thereby further promote the burning
action.
Subclass:
332
Planar surface area:
This subclass is indented under subclass 331. Structure
wherein the roof has a flat horizontal contour.
Subclass:
333
Inclined:
This subclass is indented under subclass 332. Structure
further provided with a section having a plane surface area
which is at an angle with the horizon.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), subclass 90.1 for a
flat roof construction of general application.
Subclass:
334
And convex surface area:
This subclass is indented under subclass 333. Structure
further provided with an outwardly curved contoured area.
(1) Note. The convex surface is usually known as a nose
arch.
Subclass:
335
Concave surface area:
This subclass is indented under subclass 331. Structure
wherein the arch has an inwardly curved contour.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), subclasses 86+, 245,
and 639+ for curved roof construction of general
application.
Subclass:
336
WALL STRUCTURE:
This subclass is indented under the class definition.
Structure relating to vertical barrier construction of a
combustion chamber of the class.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 6 for a boiler
provided with a water cooled furnace wall.
Subclass:
337
Bridgewall:
This subclass is indented under subclass 336. Structure
relating to wall structure for use at the rear of the fire
grate generally provided to turn the burning flame upwards
and to the structure to be heated.
(1) Note. The structure to be heated is usually a boiler
water tube.
Subclass:
338
BRICK ELEMENT:
This subclass is indented under the class definition.
Structure relating to a monolithic structure specially
adapted for use as a basic building element in a furnace
wall, ceiling, baffle, or arch.
(1) Note. The brick element is generally composed of
refractory material resistant to extreme temperatures for
sustained periods of time.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), subclasses 578+
for a module, per se, of general utility adapted to engage a
similar module and provided with an intermediate distinct
connecting means between connected modules, and subclasses
596+ for a module, per se, of general utility having an
interrelating feature for engagement with a similar module.
165, Heat Exchange, subclass 9.1 for checker brick structure
adapted to be assembled to form heat exchange open-work
structure.
202, Distillation: Apparatus, subclass 267 for elemental
materials of construction of structure of that class.
Subclass:
339
Having hanger:
This subclass is indented under subclass 338. Structure
provided with distinct attached means to allow the brick
element to be suspended from a separate support structure.
(1) Note. The brick element of this subclass is generally
used to form a suspended arch or ceiling wherein the hanger
consists generally of some type of metal bracket.
Subclass:
340
And metal casing:
This subclass is indented under subclass 339. Structure
further provided with a metallic sheathing enclosing
substantially all of the brick element.
(1) Note. The metallic casing acts as a seal between
adjacent brick when assembled.
Subclass:
341
PROCESS:
This subclass is indented under the class definition. Method
drawn to an operation peculiar to an apparatus of the class.
SEE OR SEARCH CLASS:
266, Metallurgical Apparatus, subclasses 44+ for a process
of operating a metallurgical apparatus.
431, Combustion, subclasses 2+ for a process of operating a
fluid fuel burner.
432, Heating, subclasses 1+ for a process of operating a
heating apparatus.
Subclass:
342
Treating fuel constituent or combustion product:
This subclass is indented under subclass 341. Process wherein
the fuel, refuse, or a combustion product is subjected to a
distinctive agent, action, device, or apparatus in order to
bring about a desired result.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 200+ for a locomotive-type furnace provided with
means to treat a noncombustible fluid.
subclasses 218+ for furnace structure combined with means
to treat fuel prior to combustion.
subclasses 301+ for furnace structure provided with means
to treat a noncombustible fluid.
Subclass:
343
To prevent corrosion of furnace:
This subclass is indented under subclass 342. Process wherein
the desired result is the hindrance of the decay of the
apparatus.
SEE OR SEARCH CLASS:
431, Combustion, subclass 3 for a process of clearing or
preventing the accumulation of undesired matter from a fluid
fuel burner.
432, Heating, subclass 2 for a process of clearing or
preventing the accumulation of undesired matter from a
heating apparatus.
Subclass:
344
Combustion product:
This subclass is indented under subclass 342. Process for
treating the material produced during the combustion
reaction.
SEE OR SEARCH THIS CLASS, SUBCLASS:
259 for refuse incinerator structure provided with ash
handling means.
266 for powdered fuel furnace provided with ash handling
means.
Subclass:
345
This subclass is indented under subclass 344. Exhaust gas;
e.g., pollution control, etc.: Process wherein the materials
to be treated are the gaseous fumes normally expended to the
atmosphere.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 203+ for furnace structure provided with exhaust
gas treatment means.
Subclass:
346
Incinerating refuse:
This subclass is indented under subclass 341. Subject matter
including processes for the combustion of refuse material and
the operation of incinerating apparatus.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 235+ for refuse incinerator structure.
Subclass:
347
Burning pulverized fuel:
This subclass is indented under subclass 341. Process
relating to the combustion of solid powdered fuel suspended
in a fluid.
SEE OR SEARCH THIS CLASS, SUBCLASS:
232 for furnace structure combined with means for
pulverizing solid fuel.
subclasses 261+ for furnace structure for burning
pulverized fuel and fluid fuel.
subclasses 263+ for furnace structure for burning
pulverized fuel.
Subclass:
348
Supplying fluid:
This subclass is indented under subclass 341. Process
relating to the injecting of gases or liquids into the
combustion apparatus.
SEE OR SEARCH CLASS:
266, Metallurgical Apparatus, subclass 47 for a method of
operating tuyere fluid feed means in metallurgical
apparatus.
Subclass:
349
MISCELLANEOUS:
This subclass is indented under the class definition.
Inventions specially adapted for use with an apparatus of the
class but not provided for elsewhere.
Information Products Division -- Contacts
Questions regarding this report should be directed to:
U.S. Patent and Trademark Office
Information Products Division
PK3- Suite 441
Washington, DC 20231
tel: (703) 306-2600
FAX: (703) 306-2737
email: oeip@uspto.gov
Last Modified: 6 October 2000