Safety intravenous catheter assembly with automatically retractable needle
September 30, 2014. 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 ReferencesOutside-the-needle catheter device with needle housing Corrosive protected hypodermic module Syringe for use in hypodermic biopsy, featuring automatic plunger-return Cannula insertion set with safety retracting needle Retractable needle syringe Self-blocking hypodermic syringe for once-only use, comprising a needle protection cap Safety syringe Hypodermic needle guard Needle guard assembly for use with hypodermic syringes and the like Safety retracting needle for use with syringe InventorApplicationNo. 315880 filed on 09/30/1994US Classes:604/158, Body entering conduit axially movable within body piercing conduit while former is disposed in the body604/165.02, Longitudinal movement604/198Cover or protector for body entering conduit movable axially relative to one anotherExaminersPrimary: Yasko, John D.Attorney, Agent or FirmInternational ClassA61M 005/178AbstractA safety intravenous catheter assembly is provided by interconnecting a safety receptacle for a retractable intravenous needle with a catheter that carries the needle and is advancible into a vein punctured by the needle. A coupling that is removably fastened to the catheter has an elongate stem portion that extends backwardly into the safety receptacle past a needle-stopping member within such receptacle. Such needle-stopping member is active to normally prevent backward movement of the needle into the receptacle. However, ultimate forward movement of the coupling with respect to the needle-stopping member following catheter emplacement into the vein permits movement of such needle-stopping member to non-stopping position, so that a tensioned spring can automatically urge the needle backwardly to a position wholly within the safety receptacle that protects against any accidental pricking, whereupon such receptacle, with its protectively contained needle, is discardable following removal of the coupling and the protectively encased needle from the emplaced catheter to prepare the catheter for IV connection and to prevent reuse of the contaminated needle.The needle-stopping member may be a stop gate that is cammed into open position or that is provided with a spring tensioned to open the gate when the rearward end of the coupling stem has passed through it in the manual advancement of the catheter into emplaced position in a vein of a patient. However, the presently contemplated best mode is to provide the needle-stopping member as a latching member carried by the needle stem, slidable within the safety receptacle, and arranged to be normally latched into needle-stopping position.Field of SearchBody entering conduit axially movable within body piercing conduit while former is disposed in the bodyBody entering conduit axially movable within flexible protective sheath facilitating sterile insertion into body duct Removable cover or protector for body inserted conduit Body inserted tubular conduit structure (e.g., needles, cannulas, nozzles, trocars, catheters, etc.) Body piercing condit (e.g., needle, etc.) Cover or protector for body entering conduit movable axially relative to one another | |
