Nonreusable syringe
Patent 5120310 Issued on June 9, 1992. Estimated Expiration Date: 
April 3, 2011. 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.
April 3, 2011. 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 ReferencesRetractable needle syringe Safety syringe Phlebotomy set with safety retracting needle Needle guard device Hypodermic syringe with retractable needle Syringe adapted to prevent needle sticks Patent #: 5007903 InventorApplicationNo. 679627 filed on 04/03/1991US 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 005/00AbstractA nonreusable syringe is provided having an automatically retracting hypodermic needle to prevent accidental injury after injection or undesirable reuse of the syringe. The needle is retracted by a spring located behind the syringe piston and disposed to prevent reextension of the needle after use. A locking mechanism holds the needle in position for injection. The piston includes means to release the locking mechanism as injection is completed to automatically retract the needle into the syringe. The syringe tip seal is not in frictional contact with the needle, eliminating drag on the needle during retraction.Field of SearchHaving means for preventing reuse of deviceInjector or aspirator syringe supported only by person during use (e.g., hand held hypodermic syringe, douche tube with forced injection, etc.) Portion of body entering conduit stored in material receiving syringe reservoir Cover or protector for body entering conduit movable axially relative to one another Removable cover or protector for body inserted conduit With piston or plunger for expelling material from body or injector reservoir Material conduit forced into body by spring Means for preventing accidental displacement of piston | |
