US PATENT SUBCLASS 137 / 329
.~ With provision of alternate wear parts

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

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

DEFINITION

Classification: 137/329

(under subclass 315) Devices having a part or parts made in attached duplicate form or of extensive area movably mounted in such a manner the worn or injured part may be replaced by a duplicate part or another unworn surface to restore the device to its former condition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

269+, for devices which by movement of a part to a different orientation change the mode of operation of the device.