US PATENT SUBCLASS 220 / 203.17
.~.~.~.~.~ Self-closing aperture in member

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


220 /   HD   RECEPTACLES

200  DF  CLOSURES {45}
202  DF  .~ With condition responsive vent or valve {1}
203.01  DF  .~.~ Responsive to pressure {10}
203.11  DF  .~.~.~ Flexible, resilient vent closing member {4}
203.16  DF  .~.~.~.~ Resilient sheetlike member closes vent opening {2}
203.17.~.~.~.~.~ Self-closing aperture in member

DEFINITION

Classification: 220/203.17

Self-closing aperture in member:

(under subclass 203.16) Device wherein said sheetlike member contains a slit therein, said slit opening in response to pressure, and closing due to the member's elasticity after the pressure condition is removed.