US PATENT SUBCLASS 220 / 320
.~.~.~ For applying radial pressure (e.g., contractable bands encircling member)

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.~.~.~ For applying radial pressure (e.g., contractable bands encircling member) {1}
321  DF  .~.~.~.~> Lever operated

DEFINITION

Classification: 220/320

(under subclass 319) Device wherein the closure retaining device is in the form of a ring capable of exerting a converging or diverging force in a direction parallel to the face of the closure.