US PATENT SUBCLASS 285 / 330
.~ Interlocked or overlapped

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

328  DF  PARTICULAR INTERFACE {4}
330.~ Interlocked or overlapped

DEFINITION

Classification: 285/330

(under subclass 328) Devices wherein the free ends are provided with interengaging elements (e.g., tongue and groove, etc.) or are keyed together to prevent relative rotation therebetween.

SEE OR SEARCH THIS CLASS, SUBCLASS:

148.5, for an intermediate joint with expansible spigots in a serial diverse joint system.

202+, for an interlocked sput and plate joint.

291.1, for molded joint with screw interlock.