US PATENT SUBCLASS 220 / 203.18
.~.~.~.~.~ Diaphragm-type 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}
203.18.~.~.~.~.~ Diaphragm-type member

DEFINITION

Classification: 220/203.18

Diaphragm-type member:

(under subclass 203.16) Device wherein said sheetlike member comprises a relatively thin membranelike member having a peripheral edge portion, said member being adapted to be associated with a surrounding or encompassing tubular rigid structure to extend transversely thereof to form a closing wall for said tubular structure, the outer peripheral edge of said membrane being in sealing relationship with the encompassing wall of said tubular structure.