US PATENT SUBCLASS 137 / 334
WITH HEATING OR COOLING OF THE SYSTEM

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

334WITH HEATING OR COOLING OF THE SYSTEM {6}
335  DF  .~> With burner {1}
337  DF  .~> Hot and cold water system having a connection from the hot to the cold channel
338  DF  .~> Air heated or cooled (fan, fins, or channels)
339  DF  .~> With diversion of part of fluid to heat or cool the device or its contents
340  DF  .~> Circulating fluid in heat exchange relationship
341  DF  .~> With electric heating element

DEFINITION

Classification: 137/334

(under the class definition) Fluent material device to which has been added means for heating or cooling the device or the fluent material.

(1) Note. This subclass does not include heating or cooling of the system by the transfer of heat between the fluent material and the device or from one part of the fluent material to another except where a part of the fluent material is diverted to heat or cool the device or where part of the fluent material in a separate channel is placed in heat exchange relationship with respect to other parts of the fluent material under conditions of difference in temperature.

(2) Note. This subclass does not include heating or cooling to cause actuation of a valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

13, for processes of affecting flow by the use of heat.

241, for steam sterilizing in flow handling systems.

297, for hydrants with heaters. 468, for thermally responsive valves, and see the search notes thereto.

564, for thermal type closed circulating systems.

SEE OR SEARCH CLASS

62, Refrigeration, appropriate subclasses for refrigeration processes and apparatus for cooling a material, particularly

45.1+, for process and apparatus for handling liquefied gas as a commodity including steps or means involving pressure or temperature control special to liquefied gas and more than required for other liquids, and subclasses 389+ for a withdrawable liquid cooler and subclass 404 for a gas (air) cooler.

123, Internal-Combustion Engines,

142.5, for internal combustion engines with heating means.

138, Pipes and Tubular Conduits,

32+, for devices for thawing pipes and tubular conduits.

165, Heat Exchange, appropriate subclasses for means for handling fluid for heat exchange purposes.

222, Dispensing, 113, for dispensers with burners and subclass 146 for dispensers with other heating and cooling means.

251, Valves and Valve Actuation,

11, for heat motor actuated valves.