US PATENT SUBCLASS 439 / 551
.~.~.~ Concentrically screw threaded collar

Current as of: June, 1999
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439 /   HD   ELECTRICAL CONNECTORS

527  DF  WITH SUPPORTING MEANS FOR COUPLING PART {18}
544  DF  .~ Coupling part or mating part extending into panel opening {6}
550  DF  .~.~ With opening encircling retaining collar {1}
551.~.~.~ Concentrically screw threaded collar

DEFINITION

Classification: 439/551

Concentrically screw threaded collar:

(under subclass 550) Coupling part wherein the annular member is helically ribbed about its axis for interfitting with corresponding helical grooves on the device.

(1) Note. A part of the collar, e.g.., an insert, may be

helically ribbed along the collar axis to receive a screw.

SEE OR SEARCH THIS CLASS, SUBCLASS:

550, for a collar having a concentric opening without screw threads, for a retaining screw.