US PATENT SUBCLASS 604 / 251
.~.~.~.~ Drip meter

Current as of: June, 1999
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604 /   HD   SURGERY

19  DF  MEANS FOR INTRODUCING OR REMOVING MATERIAL FROM BODY FOR THERAPEUTIC PURPOSES (E.G., MEDICATING, IRRIGATING, ASPIRATING, ETC.) {7}
48  DF  .~ Treating material introduced into or removed from body orifice, or inserted or removed subcutaneously other than by diffusing through skin {9}
93  DF  .~.~ Material introduced or removed through conduit, holder, or implantable reservoir inserted in body {30}
246  DF  .~.~.~ Means for controlling material flow to or from body, or metering a predetermined dose or amount {6}
251.~.~.~.~ Drip meter {4}
252  DF  .~.~.~.~.~> Having fluid filter
253  DF  .~.~.~.~.~> Having drip sensor
254  DF  .~.~.~.~.~> Having float controlling or indicating material flow from chamber
255  DF  .~.~.~.~.~> Mounted in material reservoir

DEFINITION

Classification: 604/251

Drip meter:

(under subclass 246) Subject matter including a light permeable chamber having an inlet tube which extends below its top wall and delivers a drop-by-drop of material into the chamber so that the rate of flow to or from the body can be measured by observing the drop rate.