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Class Information
Number: 604/218
Name: Surgery > Means for introducing or removing material from body for therapeutic purposes (e.g., medicating, irrigating, aspirating, etc.) > Treating material introduced into or removed from body orifice, or inserted or removed subcutaneously other than by diffusing through skin > Material introduced or removed through conduit, holder, or implantable reservoir inserted in body > Means moved by person to inject or remove fluent material to or from body inserted conduit, holder, or reservoir > Injector or aspirator syringe supported only by person during use (e.g., hand held hypodermic syringe, douche tube with forced injection, etc.) > With piston or plunger for expelling material from body or injector reservoir
Description: 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.










Sub-classes under this class:

Class Number Class Name Patents
604/226 Closable storage cavity included in piston or piston actuator 26
604/219 Diameter of piston selectively adjustable 20
604/223 Injector components pivoted relative to each other to move piston 67
604/236 Material flow controlled by valve or movable closure (e.g., plug in orifice, etc.) 183
604/231 Material passed to or from body through aperture in piston 66
604/232 Material reservoir (e.g., cartridge, etc.) removably mounted in syringe 394
604/220 Means for preventing accidental displacement of piston 188
604/225 Means for preventing destructive piston impact on end of material reservoir 13
604/230 Means for reducing piston sliding friction (e.g., oil applicator, use of low friction material, etc.) 61
604/229 Piston actuator contacting resilient retractable portion on piston 31
604/224 Piston moved by screw or rack 147
604/221 Piston or piston actuator slidable in or against seal ring mounted on reservoir 41
604/222 Seal ring mounted on piston 91
604/227 Specific structure of finger grip for moving piston 117
604/228 Specific structure of means coupling piston to piston actuator 242


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Patent Number Title Of Patent Date Issued
8702660 Medicament delivery device Apr. 22, 2014
8679068 Pre-filled syringe including an oxygen absorber Mar. 25, 2014
8679070 Modular administration system Mar. 25, 2014
8672899 Medication injector apparatus with drive assembly that facilitates reset Mar. 18, 2014
8672900 Hand-held, hand-operated power syringe and methods Mar. 18, 2014
8663175 Drive mechanisms suitable for use in drug delivery devices Mar. 4, 2014
8652109 Syringe with integrated valve male luer lock connector Feb. 18, 2014
8636702 Magnifying collapsed plunger rod Jan. 28, 2014
8636704 Automatic injection device Jan. 28, 2014
8632519 Syringe having a collapsible plunger rod Jan. 21, 2014
8632507 Auto-injector Jan. 21, 2014
8628499 Injection device preventing the return of the piston when the safety system is deployed Jan. 14, 2014
8622997 Tissue transfer method and apparatus Jan. 7, 2014
8622974 Plunger-driven feeding tube delivery device and methods Jan. 7, 2014
8622962 Safety syringe and method for using the same Jan. 7, 2014
8622956 Injection device with simplified stopper retention Jan. 7, 2014
8617125 Medical delivery system comprising a container and a dosing assembly with radially moving fastening means Dec. 31, 2013
8617121 Drug delivery device Dec. 31, 2013
8613720 Automatic reconstitution injector device Dec. 24, 2013
8613730 Apparatus and methods for fluid pressurizing units of injection systems Dec. 24, 2013
8608693 Tamper evident needle guard for syringes Dec. 17, 2013
8603045 Injection device Dec. 10, 2013
8597233 Cylinder-piston unit suitable for storing injection solutions for a needle-free automatic or manual filling of the cylinder-piston unit, also under atmospheric pressure Dec. 3, 2013
8597256 Seal member Dec. 3, 2013
8585658 Drug delivery device for delivery of a medicament Nov. 19, 2013
8579856 Unit dose drug delivery platform Nov. 12, 2013
8579865 Hazardous agent injection system Nov. 12, 2013
8574201 Syringe piston with check valve seal Nov. 5, 2013
8574200 Dual syringe injector system Nov. 5, 2013
8574198 Drive mechanisms suitable for use in drug delivery devices Nov. 5, 2013
8568359 Autoinjector Oct. 29, 2013
8568365 Methods and apparatus for syringe adapter Oct. 29, 2013
8562571 Slotted syringe Oct. 22, 2013
8562564 Prefilled syringe jet injector Oct. 22, 2013
8551054 Device for a medicament delivery device Oct. 8, 2013
8545512 Intraocular lens insertion device Oct. 1, 2013
8540683 Syringe device and injector system including a vent for relieving a vacuum within a syringe Sep. 24, 2013
8540682 Plunger activated capping system Sep. 24, 2013
8540681 Injection control device with gearing mechanism Sep. 24, 2013
8540670 Passive reuse prevention syringe that uses a retaining ring lock Sep. 24, 2013
8535266 Retractable safety syringe Sep. 17, 2013
8535275 Syringe-attached topical anesthetic dispenser Sep. 17, 2013
8535276 Syringe-attached topical anesthetic dispenser Sep. 17, 2013
8535278 Extendable plunger rod for medical syringe Sep. 17, 2013
8529521 Low-dosage syringe Sep. 10, 2013
8529503 Medicament delivery device Sep. 10, 2013
8529509 Syringe drive device and medication dispensing apparatus Sep. 10, 2013
8523825 Dispenser device Sep. 3, 2013
8517997 Dispenser for medicaments and method and apparatus for making same Aug. 27, 2013
8512298 Flush syringe having compressible plunger Aug. 20, 2013

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