Blood extracting and centrifuging device
Patent 4459997 Issued on July 17, 1984. Estimated Expiration Date: 
November 16, 2001. 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.
November 16, 2001. 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 3115135 3262449 3438373 3577980 3828778 Multi-purpose syringe Multi-piston syringe device Devices for extracting blood Vial stopper for blood sampling device Plunger rod and piston for a syringe InventorAssigneeApplicationNo. 06/321827 filed on 11/16/1981US Classes:600/577, Penetrable seal in liquid flow path to collection reservoir422/918, Specially adapted for centrifugation [B01L 3/14D]422/923, Plunger pump type [B01L 3/02C3]600/578, Mechanical means for drawing liquid into collection reservoir604/110, Having means for preventing reuse of device604/228Specific structure of means coupling piston to piston actuatorExaminersPrimary: Apley, Richard J.Assistant: Macey, Harry J. Attorney, Agent or FirmInternational ClassesA61B 5/15 (20060101)B01L 3/02 (20060101) B01L 3/14 (20060101) AbstractA blood extracting and centrifuging device has a cylindrical body 1 with front and rear ends 2, 3. The front end is adapted to receive a removable cannula 4 and a piston 8 is sealingly movable within the cylindrical body 1. A piston rod 9 attached to the piston 8 extends through a bore 10 at the rear end of the cylindrical body and is used to retract the piston, from an advanced position adjacent the front end to a retracted position adjacent the rear end, whereby to generate a vacuum in the cylindrical body 1 for extracting blood via the cannula 4. Securing means in the form of an annular retaining projection 22 on one of the piston 8 and the piston rod and an annular lip 24 at the rear end of the cylindrical body 1 are provided to secure the piston to the cylindrical body in its retracted position. After a blood sample has been taken the piston rod 9 can be removed and the cylindrical body 1 inserted directly in a centrifuge without the need to transfer the blood to a centrifuging vessel. | |
