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(11)    Patent No :    AP 1877    (73) Applicant(s)       
(21)    Application No :    AP/P/2004/003009    BECTON DICKINSON AND COMPANY, One Becton Drive,       
            Franklin Lakes, New Jersey 07417-1880,       
                   
(22)    Filing Date :    19.07.2002    United States of America       
(24)    Date of Grant &    13.08.2008           
                   
(45)    Publication :

(30)    Priority Data            (72) Inventors   
    (33) Country    (31) Number    (32) Date    LAU Steven Choon Meng, Singapore   
    US    60/324,434    24.09.2001    CHUA Chui Khim, Singapore   
                   
                MOH Yaohan, Singapore   
                et al       
                (74) Representative   
(84)    Designated State           
                   
    GH            HONEY & BLANCKENBERG   
                   
(51)    International    Classification    A61M 5/00 (2007.01)    A61M 5/315 (2007.01)   



(54)    Title

Single use syringe and plunger rod locking device therefor.

(57)    Abstract

A single use syringe assembly is provided as well as a locking element for such an assembly. The single use syringe assembly includes a barrel, a plunger rod assembly and a locking element positioned within the barrel. The locking element includes one or more barbs for engaging the inside surface of the barrel. The barbs present the locking element from moving proximally within the barrel, but allow its distal movement therein with the plunge rod assembly. A spring member may be provided for urging the barbs towards the

inside surface of the barrel. The barbs are preferably positioned on the edge


(56)    Documents Cited :    US 6 013 056 A    US 5 814 017 A    US 4 973 310 A    GB 2 256 146 A    US 5 215 536 A

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