Nonreusable medical device with front retraction
September 22, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3306290 Cannula insertion set with safety retracting needle Safe needle system for collecting fluids Retractable needle syringe Blood drawing apparatus Safety syringe Phlebotomy set with safety retracting needle Hypodermic syringe with retractable needle Retractable needle hypodermic syringe system Safety hypodermic syringe InventorApplicationNo. 125292 filed on 09/22/1993US Classes:604/110, Having means for preventing reuse of device604/195Portion of body entering conduit stored in material receiving syringe reservoirExaminersPrimary: Yasko, John D.Attorney, Agent or FirmForeign Patent References
International ClassA61M 005/00AbstractA nonreusable medical device has a needle for injecting or collecting fluid which is retractable by depression of a plunger slidingly mounted in the medical device. A front-mounted retraction mechanism has a needle holder connected to the needle. The needle holder is supported along the axis of the device by means of a frictionally engaged retainer ring member coupled to the needle holder along an axially aligned sliding interface. The needle holder and retainer ring are positioned in the front portion of a hollow body. The front of a movable member or plunger presses against the retainer member passing around the needle holder which cannot move forward, thereby separating the retainer member from the needle holder. The separation occurs by gradually reducing the extent of the sliding interface area until the retainer member pops loose from the needle holder whereupon the needle holder and needle are retracted into a cavity in the plunger in response to a retraction force applied to the needle holder by a previously compressed spring.Field of SearchHaving means for preventing reuse of devicePortion of body entering conduit stored in material receiving syringe reservoir Injector or aspirator syringe supported only by person during use (e.g., hand held hypodermic syringe, douche tube with forced injection, etc.) Cover or protector for body entering conduit movable axially relative to one another With piston or plunger for expelling material from body or injector reservoir | |
