US PATENT SUBCLASS 122 / 235.28
.~ Having rotary flame

Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

235.11  DF  WATER TUBE {52}
235.28.~ Having rotary flame

DEFINITION

Classification: 122/235.28

Having rotary flame:

(under subclass 235.11) Devices wherein the burners are angularly spaced apart and all the jet axes of the burners are tangential to a vertical imaginary cylinder.