US PATENT SUBCLASS 92 / 104
.~.~.~ Corrugated

Current as of: June, 1999
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92 /   HD   EXPANSIBLE CHAMBER DEVICES

89  DF  COLLAPSIBLE CHAMBER WALL PORTION (E.G., HINGED OR FLEXIBLE WALL) {1}
90  DF  .~ Wall portion formed of flexible material {5}
96  DF  .~.~ Diaphragm type {4}
104.~.~.~ Corrugated

DEFINITION

Classification: 92/104

(under subclass 96) Apparatus in which the working fluid contacting face of the diaphragm is provided with an embossment formed by having a portion of the material thereof deformed out of the plane of said face.