US PATENT SUBCLASS 137 / 68.26
.~.~.~.~.~ Reverse buckling

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

67  DF  DESTRUCTIBLE OR DEFORMABLE ELEMENT CONTROLLED {2}
68.11  DF  .~ Destructible element {9}
68.19  DF  .~.~ Rupture disc {6}
68.23  DF  .~.~.~ Direct pressure causes disc to burst {2}
68.25  DF  .~.~.~.~ Dome shape {1}
68.26.~.~.~.~.~ Reverse buckling

DEFINITION

Classification: 137/68.26

Reverse buckling:

(under subclass 68.25) Subject matter which has excessive pressure at the convex side of the disc to cause the disc to reverse its concavity and burst.