PTO Manual of Classification for US patents

PTO Manual of Classification for US patents

What follows are the subclasses from one class of the Manual of Classification for US patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retrieve patent titles by entering the class/subclass in the box below.


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363-131 121-55A 14-.5
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Class Number: 236
 Class Title: AUTOMATIC TEMPERATURE AND HUMIDITY REGULATION

Subclass  Subclass
Number    Title

  1 R     MISCELLANEOUS
  1 A     .Burner controls not elsewhere classified in class
  1 B     .Zone control for heating and cooling medium
  1 C     .Heating and cooling controls
  1 D     .Stoker controls
  1 E     .Multistage controls
  1 EA    ..Multiple valve staging
  1 EB    ..Single valve staging
  1 F     .Piezoelectric crystal and other electric unit temperature
            controls
  1 G     .Heat conserving damper control
  1 H     .Burner controls with automatic cutoff
  2       INCUBATOR TYPE OF HEATER
  3       .Electric
         .Thermostatic
  4       ..Expanding fluid
  5       ..Expanding solid
  6       BROODER TYPE OF HEATER
  7       SADIRON TYPE
  8       ATOMIZER TYPE OF BURNER
  9 R     COMBINED HEATER AND APARTMENT CONTROLLED
  9 A     .Combined heating and apartment control with heating medium
            circulation control
  10      HOT-AIR FURNACE
  11      .Air and fire control
  12.1    MIXING FLUID OF DISSIMILAR TEMPERATURE
  12.11   .Mixing valve with temperature motive means
  12.12   ..Having electrical motive means
  12.13   .Including bypass
  12.14   .Fluid from only one supply is controlled
  12.15   .Including separate relatively movable valve for each fluid
            supply
  12.16   .Having oscillating or reciprocating valve
  12.17   ..Valving member moves about an axis
  12.18   ...Tubular valve member
  12.19   ...Axially spaced flow control faces
  12.2    ..Tubular valve member
  12.21   ..Axially spaced flow control faces
  12.22   ...Seats face outwardly
  12.23   ..Ports closed by valve action
  13      .Plenum type
  14      COMBINED BOILER AND FURNACE CONTROLLED
  15 R    FURNACE CONTROLLED
  15 A    .Domestic oven controls
  15 BR   .Commercial furnace controls
  15 BA   ..Solid fuel burning
  15 BB   ..Product and furnace temperature sensor
  15 BC   ..With conveyor thru furnace
  15 BD   ..Air and fuel control
  15 BE   ..Recuperator, gas turbine, melting furnace
  15 BF   ..Specialized furnace or heater, e.g., crystal growing
  15 BG   ..Timer or programm
  15 C    .Furnace controlled responsive to pressure
  15 E    .Furnace controlled responsive to combustion products
            composition
  16      COMBINED DRAFT AND CHECK CONTROL
  *       EXCHANGE HEATERS
  17      .Pressure-operated
         .Thermostatic
  18      ..Expanding fluid
  19      ..Expanding solid
  20 R    CLOSED FLUID HEATERS
  21 R    .Safety cut-out
  21 B    ..Water heater control with excessive temperature cutoff
  22      .Radiator type
         .Combined thermostat and flow controlled
  23      ..One valve
  24      ..Two or more valves
  24.5    .Flow and pressure controlled
  25 R    .Flow controlled
  25 A    ..Flow responsive valve controlling fuel
  26 R    .Pressure-operated
  27      ..With balancing pressure chamber
  28      ..Stroke retarding
  29      ..Relay, puppet
  30      ..Bourdon type
  31      ..Float
  26 A    ..Gas burner controls
  26 B    ..Pressure responsive means controls draft
  26 C    ..Pressure responsive elements per se
  26 D    ..Pressure responsive means controls forced draft
  26 E    ..Pressure responsive means controls oil burner
  26 F    ..Pressure responsive means controls fluid coupling
         .Thermostatic
  32      ..Expanding fluid
  33      ..Expanding solid
  20 A    .Top burner control
  34      COOLING RADIATOR
  34.5    .Bypass
  35      .Air control
  35.2    ..Shutters
  35.3    ...Servomotor
  36      HEATING RADIATOR
  37      .Combined radiator and apartment controlled
  38      .Air control
         .Exhaust operated
         ..Fluid-operated motor
  39      ...Aspirator
  40      ..Thermostatic
  41      ...With trap
         .Thermostatic
  42      ..Expanding fluid
  43      ..Expanding solid
  44 R    HUMIDITY CONTROL
  44 A    .Humidity control per se
  44 B    .With evaporator cooling spray
  44 C    .Humidity and temperature control
  44 E    .With electrical conductive element
  45      DRAFT-OPERATED
  46 R    WITH TIMING ELEMENTT
  46 A    .Diverse sensor
  46 B    .Stoker control
  46 C    .Controlled diverse means
  46 D    .Domestic oven
  46 E    .Hot air furnace
  46 F    .Timer other than clock
  47      HIGH AND LOW TEMPERATURE ALTERNATE
  48 R    SNAP-ACTING
  48 A    .Including a permanent magnet
  49.1    VENTILATOR TYPE
  49.2    .Responsive to fire or smoke
  49.3    .Electrically actuated
  49.4    .Pneumatically actuated
  49.5    .Mechanical linkage actuated
  50      LIQUID VALVE
  51      DISTANCE-ADJUSTED
  52      FLOAT-OPERATED
  *       TRAPS
         .Float valve
  53      ..Thermostatic air valve
         .Pressure-operated valve
  54      ..Thermostatic pilot
         .Thermostatic
  55      ..With float-controlled pilot
  56      ..Expanding fluid
  57      ...Bourdon type
  58      ...Wafer type
  59      ..Expanding solid
  60      ...Conduit
  *       AIR-RELIEF VALVES
         .Radiator type
         ..Thermostatic
  61      ...With pressure control
  62      ...With separate float
  63      ...Expanding float
  64      ...Expanding fluid
  65      ....Float-operated
  66      ...Expanding solid
  67      MOTORS
         .Relay
  68 R    ..Auxiliary heater
  68 A    ...Heated expansible chamber vaporizer liquid injected by
              thermostat
  68 B    ...Auxiliary heater applied to main temperature sensing
              means
  68 C    ...Auxiliary heater applied to control device away from
              main temperature sensor
  68 D    ...Thermo-controlled pilot burner operates a heat motor to
              actuate main fuel valve
  69      ..Pyrometer galvanometer
  70      ...With beating element
  71      .Balanced
  72      ..Thermostatic relay
  73      .Continuous drive
  74 R    .Electric
  75      ..Reciprocating or oscillating
  76      ..Step-by-step
  77      ..Vibrating armm
  78 R    ..Relay
  78 A    ...Plural control elements
  78 B    ...Plural temperature sensors
  78 C    ...Reversible motor
  78 D    ...Proportional control
  74 A    ..Electric motor driven pump
         .Fluid-operated
  79      ..Relay
  80 R    ...Shunt
  80 A    ....Airplane
  80 B    ....Plural main valves
  80 C    ....Plural temperature sensors
  80 D    ....Pure fluid
  80 E    ....Plural pilots by single actuator
  80 F    ....Diaphragm biased open by line pressure
  80 G    ....Piston-type valve operator
  81      ...Snap-acting
  82      ...Compound
  83      ....Snap-acting
  84      ...Electric
  85      ...Pressure-operated
         ...Thermostatic
  86      ....Expanding fluid
  87      ....Expanding solid
  88      .Magnetic release
  89      ..Safety cut-out
  90      .Thermal release
  *       THERMOSTATIC
  91 R    .Hot and cold
  91 A    ..Nonhabitable enclosure, e.g., incubator
  91 B    ..With oil burner
  91 C    ..With diverse sensor, e.g., humidity, pressure
  91 D    ..Heating and cooling
  91 E    ..Plural room or plural outside thermostat
  91 F    ..With at least one temperature sensor for temperature
             modifying media
  91 G    ..Current modifying sensor
  92 R    .With pressure control
  92 A    ..Combined with fuel gas pressure regulator
  92 B    ..Refrigeration expansion valves
  92 C    ..Pressure- and temperature-actuated relief valves
  92 D    ..Pressure- and temperature-actuated valves associated with
             carburetors
  93 R    .In fluid controlled
  93 A    ..Expanding fluid
  93 B    ..Shower heads
  94      .With indicator or alarm
         .Flue or heater attached
  95      ..Expanding fluid
  96      ..Expanding solid
  97      .Cooled element
  98      .Fluid transmission
  99 R    .Expanding fluid
  100     ..Float or piston operation
  99 A    ..Nontemperature sensor
  99 B    ..Nonvalving device
  99 C    ..External and internal sensors
  99 D    ..Heat shieldd
  99 E    ..Plural temperature sensors
  99 F    ..Pivoted valve
  99 G    ..Lever
  99 H    ..Liquid fuel feed
  99 K    ..Wax thermostat
  99 J    ..In flow line
  101 R   .Expanding solid
  102     ..Concentric elements
  103     ..Conduit
  104     ..Fire pot
  101 A   ..Plural inlets or outlets
  101 B   ..Plural thermostats
  101 C   ..Thermostat with I.C.E.
  101 D   ..Coil thermostat
  101 E   ..Compound lever
  *       ******************************
  *       DIGESTS
  *       ******************************
  DIG 1   Adjustable lever
  DIG 2   Fail safe
  DIG 3   Safety electric
  DIG 4   Safety vacuum
  DIG 5   Fusible
  DIG 6   Clamp on
  DIG 7   Coil bulb
  DIG 8   Computer
  DIG 9   Fan control
  DIG 10  Filling
  DIG 11  Expandible fluid
  DIG 12  Heat conductor
  DIG 13  Humidithermostat
  DIG 14  Intermittant control
  DIG 15  Photocell
  DIG 16  Relief spring
  DIG 17  Spring rate compensator
  DIG 18  Rubber
  DIG 19  Ventilated thermostat