Syringe with retractable needle
Patent 5046508 Issued on September 10, 1991. Estimated Expiration Date: 
December 19, 2009. 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.
December 19, 2009. 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 ReferencesSuturing device Shielded safety syringe having a retractable needle Safe needle system for collecting fluids Protective device for cannula used to draw blood Patent #: 4900310 InventorApplicationNo. 452727 filed on 12/19/1989US Classes:600/576, Manually supported collector with rigid intake tube (e.g., a hollow needle, etc.)604/182, Means moved by weight of body placed thereon604/198Cover or protector for body entering conduit movable axially relative to one anotherExaminersPrimary: Hindenburg, MaxAttorney, Agent or FirmForeign Patent References
International ClassA61B 005/00AbstractA medical instrument comprises a needle which is movable between an extended operative position where the needle is exposed for use and a retracted inoperative position where the needle is covered so as to reduce the likelihood of inadvertent contact with the needle. The instrument also includes a needle biasing means which normally urges the needle toward its retracted position and an actuator movable between a position of interference with movement of the needle to its retracted position and a position out of interference with the needle to permit the needle biasing means to act on the needle and urge the same toward its retracted position.Field of SearchHaving cover or protector for body entering conduitEntire body entering conduit stored in cavity in piston or piston actuator inside syringe prior to use And extended therefrom by piston when syringe is used Cover or protector for body entering conduit movable axially relative to one another | |
