US PATENT SUBCLASS 48 / 189.1
.~ Three or more different fluids entering apparatus

Current as of: June, 1999
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48 /   HD   GAS: HEATING AND ILLUMINATING

180.1  DF  MIXERS {9}
189.1.~ Three or more different fluids entering apparatus

DEFINITION

Classification: 48/189.1

Three or more different fluids entering apparatus:

(under subclass 180.1) Apparatus having provision for three or more different combustible gases or gases which support combustion to separately enter the apparatus.

(1) Note. Any difference in the gases is sufficient to make them different.

(2) Note. This subclass includes for example devices which mix a high calorific fuel gas, a low calorific fuel gas and air.