Safety syringe with retractable needle
October 3, 2010. 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 ReferencesMedical syringe Retractable disposable syringe Dental syringe having an automatically retractable needle Retractable safety needles Retractable hypodermic safety syringe Shielded safety syringe Self-capping needle assembly Disposable hypodermic syringe and needle combination having retractable, accident preventing sheath Disease control syringe having a retractable needle Post-injection needle sheath InventorsAssigneeApplicationNo. 592504 filed on 10/03/1990US 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 FirmInternational ClassA61M 005/00AbstractAn improved safety syringe with retractable needle is provided which allows retraction of the needle into a hollow plunger by additional forward pressure on the plunger after the fluid is driven from the syringe. The present invention contemplates an improved syringe device with retractable needle, and a method of delivering fluid to a patient and retracting the needle within the syringe after the fluid is delivered. The syringe preferably includes a hollow plunger inserted into one end of a cylindrical barrel and a hollow needle attached to the other end of the barrel. Biasing means is attached to the barrel for biasing the needle toward the hollow plunger, and means is provided for releasing the needle into the hollow plunger by applying additional forward pressure upon the plunger after the plunger is fully extended into the barrel. The present invention is particularly convenient for the operator to use in a one-handed fashion and is relatively uncomplicated and easy to manufacture. Further, the present invention is non-reusable after the needle is retracted thereby preventing reuse of a potentially contaminated syringe.Other References
Field of SearchPortion of body entering conduit stored in material receiving syringe reservoirHaving means for preventing reuse of device Injector or aspirator syringe supported only by person during use (e.g., hand held hypodermic syringe, douche tube with forced injection, etc.) Removable cover or protector for body inserted conduit Cover or protector for body entering conduit movable axially relative to one another | |
