US PATENT SUBCLASS 285 / 391
.~ Interrupted thread

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

390  DF  SCREW {3}
391.~ Interrupted thread

DEFINITION

Classification: 285/391

(under subclass 390) Devices in which only circumferentially spaced segments of the connecting members are threaded thereby allowing all the threads to be engaged simultaneously and tightened by less than a full turn of a member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

34, for a quick release coupling having radially moved segmented threads (e.g., chuck type).

396, for a coupling with bayonet type cams.