US PATENT SUBCLASS 220 / 299
.~.~.~.~ With anti-friction means

Current as of: June, 1999
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220 /   HD   RECEPTACLES

200  DF  CLOSURES {45}
288  DF  .~ Removable closure guided in rotary movement (e.g., screw) {6}
293  DF  .~.~ Quick removal (e.g., bayonet) {7}
298  DF  .~.~.~ Radially inwardly and outwardly extending interlocking lugs {1}
299.~.~.~.~ With anti-friction means

DEFINITION

Classification: 220/299

(under subclass 298) Device wherein the lug engaging surfaces are provided with means to lessen the friction therebetween.