US PATENT SUBCLASS 137 / 329.06
.~.~.~ Successively used adjacent independent elements

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

315  DF  WITH REPAIR, TAPPING OR ASSEMBLY MEANS {6}
329  DF  .~ With provision of alternate wear parts {1}
329.01  DF  .~.~ Valve heads and/or seats {3}
329.06.~.~.~ Successively used adjacent independent elements

DEFINITION

Classification: 137/329.06

(under subclass 329.01) Devices in which are stored adjacently a plurality of separate elements forming duplicate surfaces successively used.