Catheter sharp retraction system
August 31, 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 2722215 2841143 3825003 Needle-hub assembly for syringes Shielded needle Needle container and method for preventing accidental contact with a needle Retractable safety needle Cannula insertion set with safety retracting needle Dental syringe having an automatically retractable needle Retractable safety needles InventorsApplicationNo. 114473 filed on 08/31/1993US Classes:604/158, Body entering conduit axially movable within body piercing conduit while former is disposed in the body604/164.12, Having biasing means for urging body piercer, obturator, or stylet604/171Body entering conduit axially movable within flexible protective sheath facilitating sterile insertion into body ductExaminersPrimary: Yasko, John D.Attorney, Agent or FirmInternational ClassA61M 005/00AbstractA trocar and catheter assembly for automatically disarming the trocar after placement of the catheter into a patient's blood vessel includes a spring urging retraction of the trocar and a releasable retainer mechanism for maintaining the trocar in an extended position during insertion of the catheter into the blood vessel. In one embodiment, the catheter is removably mounted to a handle which defines an internal passage. Disengaging the handle from the catheter after placement of the catheter into the blood vessel actuates the releasable retainer mechanism for allowing the trocar to be drawn into the handle passage under the influence of a spring, to enclose the sharpened end of the trocar after use. In another embodiment, the insertion device is in the form of a pair of wings which are movable between a closed position and an open position. The wings are in their closed position and grasped by the user when inserting the catheter into the blood vessel, and are thereafter moved to their open position. Movement of the wings to their open position actuates the releasable retainer mechanism, and the trocar is then drawn rearwardly so that its sharpened end is drawn into the catheter passage under the influence of the spring.Field of SearchBody entering conduit axially movable within body piercing conduit while former is disposed in the bodyHaving means for preventing reuse of device Cover or protector for body entering conduit movable axially relative to one another Removable cover or protector for body inserted conduit Body piercing condit (e.g., needle, etc.) Specific structure for preventing or minimizing inconvenience casued by breakage during insertion of conduit into body Specific structure for preventing coring of body tissue | |
