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:
Oct. 25, 1994
Filed:
Sep. 13, 1993
Kevin M Johnson, Rochester, NY (US);
Dennis J O'Dea, Macedon, NY (US);
Sterling Winthrop Inc., New York, NY (US);
Abstract
This invention relates to a novel cartridge-needle unit having a retractable needle for use with disposable or reusable holders to form safety syringes. The cartridge-needle unit comprises a cartridge comprising a hollow body, a septum at the distal end of the body, means for retaining the septum, and a plunger, axially and reciprocally slidable through the interior of the body; a needle capable of being withdrawn within the cartridge; a hub comprising a sleeve adapted to be snapped on the distal end of the cartridge; means for retaining the needle within the hub during an injection; and means for releasing the needle from the hub after the injection comprising an element capable of passing through the septum. The retractable cartridge-needle unit exhibits improved reliability, reduces the tendency for body fluids and/or medication to remain in an unprotected area upon retraction of the needle and virtually eliminates the possibility that the needle can be released into the patient.