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:
May. 01, 2012
Filed:
Apr. 18, 2006
Damien Judd, Heathmont, AU;
Joseph Hermes Kaal, Morpeth, AU;
Craig Stephen Thorley, Largs, AU;
Unitract Syringe Pty Ltd., Sydney, New South Wales, AU;
Abstract
A retractable syringe () and plunger () therefore are provided, whereby the plunger comprises a controlling means () which facilitates control of the rate of retraction of the retractable needle. By controlling the rate of needle retraction, the likelihood of blood spattering is reduced, thereby improving the user-friendliness and appeal of the retractable syringe. Typically, the syringe is a prefilled syringe. Following plunger depression, a symmetrical ejector member () releases the retractable needle () from a retaining member () to thereby allow retraction of the retractable needle. Needle retraction is facilitated by a biasing means (), such as a spring or other compressible and/or de-compressible device. The plunger comprises a plunger housing (), in which is located the controlling means. The controlling means may be a pneumatic air space () inside the plunger housing which automatically acts against the retracting needle to thereby control or regulate the rate of retraction.