US PATENT SUBCLASS 431 / 157
MEANS AT CHAMBER OUTLET ESTABLISHING COMBUSTION PRESSURE DISTINCT FROM AMBIENT


Current as of: June, 1999
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431 /   HD   COMBUSTION

157MEANS AT CHAMBER OUTLET ESTABLISHING COMBUSTION PRESSURE DISTINCT FROM AMBIENT {1}
158  DF  .~> Chamber outlet forms jet nozzle


DEFINITION

Classification: 431/157

(under the class definition) Apparatus including a combustion chamber that has at its outlet distinct structure, which in the performance of its intended function, establishes or maintains a pressure within the combustion space distinctly above or below the pressure of the ambient which pressure is critical in the operation of the apparatus.

(1) Note. A gravity type exhaust flue is not by itself considered to establish a pressure critically distinct from the pressure of the ambient.

SEE OR SEARCH THIS CLASS, SUBCLASS:

19, for a burner having a control responsive to combustion chamber pressure.

20, for automatic control of or by an exhaust damper or pump.

SEE OR SEARCH CLASS

110, Furnaces, 147+, for a device that acts directly on the products of combustion of a solid fuel burner after they leave the firebox, to affect the velocity of the products.