US PATENT SUBCLASS 604 / 143
.~.~.~.~.~.~ Piston impelled by gas or vacuum pressure


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}
131  DF  .~.~.~ Treating material forced into or out of body by self-acting fluid pressure, motor-driven, or mechanical energy storing means (e.g., pressure infusion or aspiration, etc.) {8}
140  DF  .~.~.~.~ Material impelled by pressurized charge of gas or vacuum {5}
141  DF  .~.~.~.~.~ Material impelled by means (e.g., diaphragm, piston) moved by gas or vacuum pressure {2}
143.~.~.~.~.~.~ Piston impelled by gas or vacuum pressure {1}
144  DF  .~.~.~.~.~.~.~> And impelling material conduit into body


DEFINITION

Classification: 604/143

Piston impelled by gas or vacuum pressure:

(under subclass 141) Subject matter wherein the intermediate means moved by gas or vacuum pressure is a piston or ram.

SEE OR SEARCH THIS CLASS, SUBCLASS:

218+, for manually operated piston structure.