US PATENT SUBCLASS 92 / 91
.~.~ Envelope having restricted fluid opening

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}
91.~.~ Envelope having restricted fluid opening {1}
92  DF  .~.~.~> Non-metallic

DEFINITION

Classification: 92/91

(under subclass 90) Apparatus comprising a bulb, bag, box or other container like enclosure formed of flexible material, said enclosure being provided with a relatively small opening in a wall thereof through which working fluid may be admitted to or exhausted from the enclosure.

SEE OR SEARCH CLASS

137, Fluid Handling,

150, for a flow starting means for a siphon, comprising a collapsible bulb.

604, Surgery,

212+, for a pump or squeeze bulb type syringe. For a discussion of the line between Class 92 and Class 604, see section III of the class definition (92).