US PATENT SUBCLASS 604 / 218
.~.~.~.~.~ With piston or plunger for expelling material from body or injector reservoir


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}
181  DF  .~.~.~ Means moved by person to inject or remove fluent material to or from body inserted conduit, holder, or reservoir {3}
187  DF  .~.~.~.~ Injector or aspirator syringe supported only by person during use (e.g., hand held hypodermic syringe, douche tube with forced injection, etc.) {13}
218.~.~.~.~.~ With piston or plunger for expelling material from body or injector reservoir {15}
219  DF  .~.~.~.~.~.~> Diameter of piston selectively adjustable
220  DF  .~.~.~.~.~.~> Means for preventing accidental displacement of piston
221  DF  .~.~.~.~.~.~> Piston or piston actuator slidable in or against seal ring mounted on reservoir
222  DF  .~.~.~.~.~.~> Seal ring mounted on piston
223  DF  .~.~.~.~.~.~> Injector components pivoted relative to each other to move piston
224  DF  .~.~.~.~.~.~> Piston moved by screw or rack
225  DF  .~.~.~.~.~.~> Means for preventing destructive piston impact on end of material reservoir
226  DF  .~.~.~.~.~.~> Closable storage cavity included in piston or piston actuator
227  DF  .~.~.~.~.~.~> Specific structure of finger grip for moving piston
228  DF  .~.~.~.~.~.~> Specific structure of means coupling piston to piston actuator
229  DF  .~.~.~.~.~.~> Piston actuator contacting resilient retractable portion on piston
230  DF  .~.~.~.~.~.~> Means for reducing piston sliding friction (e.g., oil applicator, use of low friction material, etc.)
231  DF  .~.~.~.~.~.~> Material passed to or from body through aperture in piston
232  DF  .~.~.~.~.~.~> Material reservoir (e.g., cartridge, etc.) removably mounted in syringe {3}
236  DF  .~.~.~.~.~.~> Material flow controlled by valve or movable closure (e.g., plug in orifice, etc.) {2}


DEFINITION

Classification: 604/218

With piston or plunger for expelling material from body or injector reservoir:

(under subclass 187) Subject matter having a piston or ram which is actuated by a person to force a body treating material from a material container into the body or to draw material from the body into the container.

SEE OR SEARCH THIS CLASS, SUBCLASS:

152, and 154, for piston devices employing power means to move piston.

208, for metering devices employing piston drive means.