US PATENT SUBCLASS 29 / 888.049
.~.~.~ Ring groove forming or finishing

Current as of: June, 1999
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29 /   HD   METAL WORKING

592  DF  METHOD OF MECHANICAL MANUFACTURE {54}
888  DF  .~ Prime mover or fluid pump making {12}
888.04  DF  .~.~ Piston making {6}
888.049.~.~.~ Ring groove forming or finishing

DEFINITION

Classification: 29/888.049

Ring groove forming or finishing:

(under subclass 888.04) Process wherein the manufactured piston has a slot or recess especially adapted for receiving a piston ring or seal means therein.