US Patent Class 236
AUTOMATIC TEMPERATURE AND HUMIDITY REGULATION



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Current as of: June, 1999
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Products
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Services

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