US PATENT SUBCLASS 285 / 121.3
.~.~ Revolvable

Current as of: June, 1999
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285 /   HD   PIPE JOINTS OR COUPLINGS

120.1  DF  HAVING PLURAL INDEPENDENT PATHS {4}
121.1  DF  .~ Allowing relative motion of pipes {3}
121.3.~.~ Revolvable {2}
121.4  DF  .~.~.~> Having spring biasing for maintaining a leak-proof seal
121.5  DF  .~.~.~> Having specific bearing structure

DEFINITION

Classification: 285/121.3

Revolvable:

(under subclass 121.1) Subject matter comprising a coupling for two or more elements, one or more of said elements being rotatable by at least 360 degrees.