US PATENT SUBCLASS 92 / 97
.~.~.~ Axially spaced flexible wall portions with interposed incompressible means

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}
97.~.~.~ Axially spaced flexible wall portions with interposed incompressible means

DEFINITION

Classification: 92/97

(under subclass 96) Apparatus in which the diaphragm comprises two or more relatively thin membranes positioned with one member overlying and spaced from the other member, and means comprising a rigid element or an incompressible fluid positioned between said members, so that movement of one member is transmitted to said other member through said rigid element or incompressible fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

49, for a plurality of flexible wall working members of the diaphragm type in which the diaphragms have different working

fluid contacting areas.

SEE OR SEARCH CLASS

181, Acoustics,

157+, for a diaphragm for an acoustical device.