US PATENT SUBCLASS 285 / 390
SCREW

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

390SCREW {3}
391  DF  .~> Interrupted thread
392  DF  .~> Attached thread bushing
393  DF  .~> Gland

DEFINITION

Classification: 285/390

(under the class definition) Subject matter comprising screw threads at the coupling interface.

SEE OR SEARCH THIS CLASS, SUBCLASS:

33+, for a threaded joint with means to provide quick release.

40, for a joint with combined thread cutting means.

148.19+, for differential threads.

291.1+, for a screw interlock in a molded joint.

333, for a threaded conical interface. 355, for a packed screw-type joint.

SEE OR SEARCH CLASS

279, Chucks or Sockets,

99, for analogous threaded connection between a chuck and

tool.

403, Joints and Connections,

343, for an analogous connection between rods.