US PATENT SUBCLASS 220 / 321
.~.~.~.~ Lever operated

Current as of: June, 1999
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220 /   HD   RECEPTACLES

200  DF  CLOSURES {45}
315  DF  .~ Having means for securing or retaining closure in its closed position (e.g., fastening devices) {8}
319  DF  .~.~ Ring type {1}
320  DF  .~.~.~ For applying radial pressure (e.g., contractable bands encircling member) {1}
321.~.~.~.~ Lever operated

DEFINITION

Classification: 220/321

(under subclass 320) Device wherein the ring is expanded or contracted by a force multiplying means such as a lever.