US PATENT SUBCLASS 137 / 311
.~ Rotary reversing valve

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

309  DF  REVERSING VALVES - REGENERATIVE FURNACE TYPE {2}
311.~ Rotary reversing valve

DEFINITION

Classification: 137/311

(under subclass 309) Reversing valves wherein the valve is mounted for rotating or oscillating motion.

SEE OR SEARCH THIS CLASS, SUBCLASS:

250, for rotary reversing valves of this type having liquid trap seals.