The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 05, 2016
Filed:
Nov. 11, 2010
Craig Stephen Thorley, Largs, AU;
Joseph Hermes Kaal, Raworth, AU;
Christopher Charles Rafferty, Raworth, AU;
Ian Johnson, Pennant Hills, AU;
Eric Siu, Strathfield, AU;
Andrew Reade, Castle Hill, AU;
Craig Stephen Thorley, Largs, AU;
Joseph Hermes Kaal, Raworth, AU;
Christopher Charles Rafferty, Raworth, AU;
Ian Johnson, Pennant Hills, AU;
Eric Siu, Strathfield, AU;
Andrew Reade, Castle Hill, AU;
UNITRACT SYRINGE PTY LTD, New South Wales, Sydney, AU;
Abstract
A replaceable needle assembly is provided for a retractable, prefilled syringe comprising a barrel having a mounting member and a plunger, whereby the retractable needle can be replaced by a user without affecting the retraction mechanism. The replaceable needle assembly comprises a needle fitted to a retractable needle mount and a needle retainer. The needle mount is removably, screw-threadedly mountable to the mounting member of the barrel. The needle retainer comprises a plurality of fingers that releasably engage the retractable needle to thereby prevent inadvertent retraction of the retractable needle before engagement by the plunger. The plunger comprises a plunger seal comprising an outer member and an inner member that engages the needle for spring-driven retraction. At the end of retraction, a lock is formed between the plunger and barrel to prevent re-use of the syringe.