US PATENT SUBCLASS 285 / 121.4
.~.~.~ Having spring biasing for maintaining a leak-proof seal

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  DF  .~.~ Revolvable {2}
121.4.~.~.~ Having spring biasing for maintaining a leak-proof seal

DEFINITION

Classification: 285/121.4

Having spring biasing for maintaining a leak-proof seal:

(under subclass 121.3) Subject matter wherein a resilient means provides pressure to maintain a leak-proof seal at the coupling.