US PATENT SUBCLASS 604 / 229
.~.~.~.~.~.~ Piston actuator contacting resilient retractable portion on piston


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  DF  .~.~.~.~.~ With piston or plunger for expelling material from body or injector reservoir {15}
229.~.~.~.~.~.~ Piston actuator contacting resilient retractable portion on piston


DEFINITION

Classification: 604/229

Piston actuator contacting resilient retractable portion on piston:

(under subclass 218) Subject matter wherein the piston includes an elastic portion with shape retaining memory which

when depressed by the piston actuator will deform and thereafter regain its initial shape when the actuator is removed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

160, and 900, for other blood "telltale" devices.