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:
Feb. 09, 2016
Filed:
Nov. 11, 2010
Craig Stephen Thorley, Largs, AU;
Joseph Hermes Kaal, Raworth, AU;
Ian Johnson, Pennant Hills, AU;
Andrew Reade, Castle Hill, AU;
Eric Siu, Strathfield, AU;
Richard Sokolov, Earlwood, AU;
Christopher Dunn, Spring Farm, AU;
Craig Stephen Thorley, Largs, AU;
Joseph Hermes Kaal, Raworth, AU;
Ian Johnson, Pennant Hills, AU;
Andrew Reade, Castle Hill, AU;
Eric Siu, Strathfield, AU;
Richard Sokolov, Earlwood, AU;
Christopher Dunn, Spring Farm, AU;
UNITRACT SYRINGE PTY LTD, Sydney, AU;
Abstract
A replaceable needle assembly is provided for a retractable syringe comprising a barrel and a plunger, whereby the retractable needle can be replaced by a user without affecting the retraction mechanism. A mounting member is removably mountable to the barrel by way of a screw-thread connection and a needle mount is removably coupled to the mounting member. A needle is mounted to the needle mount. The barrel comprises a needle mount retainer that comprises a plurality of fingers that engage the retractable needle mount to prevent inadvertent retraction. The plunger comprises a collapsible seal which maximizes the efficiency of fluid delivery prior to the plunger engaging the retractable needle mount for retraction. An initially compressed spring decompresses to drive retraction of the plunger and the engaged needle mount. A lock formed between the plunger and barrel prevents further use of the plunger after retraction.