US PATENT SUBCLASS 29 / 888.075
.~.~.~ Including grinding or honing

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}
888.07  DF  .~.~ Piston ring or piston packing making {6}
888.075.~.~.~ Including grinding or honing

DEFINITION

Classification: 29/888.075

Including grinding or honing:

(under subclass 888.07) Process wherein the manufactured ring is shaped or polished by abrading which removes surface material.

SEE OR SEARCH CLASS

451, Abrading,

51+, for process of grinding a piston or packing ring.