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.:

US 8864706 B1

PDF
Full Text
Expired
Date of Patent:
Oct. 21, 2014

Filed:

Dec. 31, 2010
Applicant:

Teoh Hwa Ang, Singapore, SG;

Inventor:

Teoh Hwa Ang, Singapore, SG;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61M 5/00 (2006.01); A61M 5/50 (2006.01); A61M 5/32 (2006.01); A61M 5/34 (2006.01);
U.S. Cl.
CPC ...
A61M 5/3234 (2013.01); A61M 5/508 (2013.01); A61M 5/5086 (2013.01); A61M 5/3202 (2013.01); A61M 2205/586 (2013.01); A61M 5/347 (2013.01);
Abstract

A retractable syringe comprises a cutting head mounted on a plunger of the syringe. When the plunger is advanced to expel fluid from the syringe, the cutting crown cuts a retention mechanism which holds a needle unit of the syringe, allowing a drive mechanism to drive the needle unit into the syringe. The cutting crown is shaped to reduce the force which has to be applied to cut the retention mechanism. Furthermore, a disposable needle assembly for attachment to a syringe unit comprises a needle and connector element for connecting the needle to the syringe unit. The connector element encircles the needle and has a thread on its outer surface for mating with the syringe unit. When the needle assembly is mated with the syringe, a central bore of substantially constant bore extends from the tip of the needle into the interior chamber of the syringe.


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Ang, Teoh. (2014). Retractable syringe with a cutting crown (U.S. Patent No. 8864706). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8864706

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