US PATENT SUBCLASS 277 / FOR 143
.~ Common bias for axially spaced packings (277/141)

Current as of: June, 1999
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277 /   HD   SEAL FOR A JOINT OR JUNCTURE

FOR 140  DF  WITH DISTINCT RADIALLY ACTING BIAS(277/138) {16}
FOR 143.~ Common bias for axially spaced packings (277/141)

DEFINITION

Classification: 277/FOR.143

Foreign art collections wherein two or more axially spaced packing rings have a single common bias means.