US PATENT SUBCLASS 165 / 200
WITH TIMER, PROGRAMMER, TIME DELAY, OR CONDITION RESPONSIVE CONTROL

Current as of: June, 1999
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165 /   HD   HEAT EXCHANGE

200WITH TIMER, PROGRAMMER, TIME DELAY, OR CONDITION RESPONSIVE CONTROL {14}
201  DF  .~> Having heating and cooling capability {13}
266  DF  .~> Pre-heat or pre-cool of space or device during start-up
267  DF  .~> Means to heat or cool for predetermined periods of time (e.g., duty cycle, time-temperature profiler, etc.) {2}
270  DF  .~> Time delay
271  DF  .~> Vehicle or engine speed responsive
272  DF  .~> Control of heat pipe heat transfer characteristics {2}
275  DF  .~> Control of amount of conductive gas in confined space between heat source and heat sink
276  DF  .~> Control of variable thermal conductivity systems (e.g., heat valves, etc.) {1}
278  DF  .~> Vent of system (e.g., overpressure, overtemperature, removal of noncondensable, etc.)
279  DF  .~> Pressure and temperature responsive or control {1}
281  DF  .~> Fluid pressure responsive or control {3}
287  DF  .~> Temperature responsive or control {5}
301  DF  .~> Liquid-level responsive or control means {1}
303  DF  .~> Cleaning

DEFINITION

Classification: 165/200

WITH TIMER, PROGRAMMER, TIME DELAY, OR CONDITION RESPONSIVE:

(under the class definition) Subject matter wherein associated with the heat transfer apparatus there is an instrument having either: (a) a means for measuring or recording time; or a device for controlling the heat transfer apparatus at a predetermined time (e.g., a clock- thermostat, an oven timer, etc.); or (b) a means for scheduling or coordinating the performance of a repetitive sequence of operations; or (c) a means for accepting an input signal and providing a time interval before initiating an output signal; or (4) a means to sense a randomly occurring condition or a change in condition of the heat transfer apparatus, wherein the sensing means operates to directly or indirectly effect a change in an operation of the heat transfer apparatus.

(1) Note. In many cases, a programmer controls a sequence of operations of a cyclic nature.

SEE OR SEARCH CLASS

62, Refrigeration,

157+, for an automatically controlled refrigerating system with a time and program actuator; subclass 171 for control apparatus associated with a gas-liquid contact cooler; subclass 176 for control of a refrigeration system by a humidity sensor; subclasses 231+ for a refrigerating system

controlled by a time or program actuator; and appropriate subclasses for processes limited to refrigeration and apparatus having features specialized to refrigeration. Note. The line between Classes 165 and Class 62 is: Class 165 takes: (a) A reversible heat pump or a refrigeration producing system that provides useful cooling, in combination with a supplemental heating means near or on a condenser for providing heat during a heating mode. (b) A refrigeration evaporator or condenser, per se. (c) Nominal recitation of an expansion device in combination with specific evaporator structure. (d) A liquid receiver or an accumulator which is built into or as a part of a heat exchanger. (e) A refrigeration producer having means to convert the same to a heating system so that it no longer function as a refrigeration producer (e.g., by omitting the evaporator, etc.). Class 62 takes: (a) A reversible heat pump or a refrigeration producing system that provides useful cooling. (b) Specific expansion device structure in combination with an evaporator. (c) A reversible heat pump or a refrigeration producing system that provides useful cooling in combination with a heating means for removing or preventing the deposition of condensate (frost) or thawing a freezing mold.

(1) Note. A reversible heat pump or a refrigeration producing system that provides useful cooling in combination with a supplemental heating means at or on the condenser is classified in Class 165. A refrigeration producing system having means to convert the same to a heating system so that at one time it no longer functions as a refrigeration producer (e.g., omitting the evaporator, etc.) is also classified in Class 165.

236, Automatic Temperature and Humidity Regulation, 44, for automatic humidity controlling mechanism; subclass 46 for temperature or a humidity controlling mechanism including a timing means; and appropriate subclasses for a temperature or humidity control mechanism associated with general utility. Note. The line between Class 165 and 236 is: Class 165 takes: (a) Nominal recitation of a means for heating and cooling, and a means for automatically controlling the means for heating and cooling. (b) Specific heat exchanger structure in combination with a means for automatically controlling a heat exchanger. (c) Specific heat exchange structure in combination with a means for automatically controlling a heating and a cooling means. Class 236 takes: A patent with nominal recitation of a heat exchanger in combination with a means for automatically controlling a heating or cooling means.

237, Heating System,

70+, for structure of a radiator of a heating system.

(1) Note. The line between Classes 165 and 237 on reversible heat pump or refrigeration producing system is: Class 165 takes: A reversible heat pump or refrigeration system that

provides useful cooling in combination with a supplemental heating means on or near a condenser for providing heat during a heating mode. Class 237 takes: A reversible heat pump or refrigeration producing system that only provides useful heating.

(2) Note. The line between Classes 165 and 237 on radiator for heating is: Class 165 takes: (a) Radiator structure, per se. (b) Radiator structure in combination with building structure. Class 237 takes: A patent with a heating system for a habitable enclosure (e.g., building structure, etc.) having a radiator in combination with a heat generator (e.g., boiler, steam generator, etc.) or in combination with a means to distribute radiator fluid to different areas of the habitable enclosure (e.g., piping, a plurality of connected radiators, etc.).

366, Agitating, appropriate subclasses for agitating process or apparatus of general utility;

144+, for an agitator in combination with a heating or cooling means.

(1) Note. The line between Classes 165 and 366 on combined agitator and heat exchanger is: Class 165 takes: (a) All patents with significant heat exchange structure in combination with nominal structural recitation of an agitator. (b) All patents with a heat exchanger having an agitator which operates on a working fluid (e.g., a coolant or heating fluid), whether or not the agitator structure is broadly or significantly claimed. (c) All patents with a heat exchanger having a working fluid (e.g., a coolant or heating fluid) which goes through the inside of a movable portion of an agitator, whether or not the agitator structure is broadly or significantly claimed. Exception to the above statements (b) and (c): Patents in which a working fluid is agitated by an agitator and then allowed to be mixed in a mixing chamber containing a material or fluid to be treated (heated or cooled) are classified in Class 366. Class 366 takes: (a) Significant agitator structure in combination with significant structure of a heat exchanger. (b) Significant agitator structure in combination with nominal structure of a heat exchanger. Exception to the above statements (a) and (b): A patent with a heat exchanger having a working fluid (a coolant or heating fluid) which goes through the inside of a movable portion of an agitator is classified in Class 165, whether the agitator structure is significantly or broadly claimed. Class 366 takes a heat exchanger having an agitator which operates on a working fluid only if the working fluid is then allowed to flow into a mixing chamber containing a material or fluid to be heated or cooled.

454, Ventilation, appropriate subclasses for ventilation means and related processes not including specific heat exchange means.