US PATENT SUBCLASS 451 / 51
.~ Ring, tube, bushing, sleeve, or cylinder abrading

Current as of: June, 1999
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451 /   HD   ABRADING

28  DF  ABRADING PROCESS {19}
51.~ Ring, tube, bushing, sleeve, or cylinder abrading {1}
52  DF  .~.~> Bearing raceway

DEFINITION

Classification: 451/51

Ring, tube, bushing, sleeve, or cylinder abrading:

(under subclass 28) Method for grinding a ring, tube, bushing, sleeve, cylinder, or the like requiring "internal" grinding.

SEE OR SEARCH CLASS

29, Metal Working,

888.07+, for a process of making a piston ring involving more than grinding.