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. 23, 1993
Filed:
Feb. 15, 1991
Michael J Botich, Oxnard, CA (US);
Thor Halseth, Simi Valley, CA (US);
Med-Design, Inc., Simi Valley, CA (US);
Abstract
A hypodermic injection system (7) with a retractable needle (9) wherein the needle (9) retracts within an interior cavity (71) of a syringe plunger (59), such that the needle (9) is confinedly held within the plunger (59). A cylindrical spring housing (21) has resilient fingers (23) which captures a spring (15) biasly holding a needle holder (11) against the retaining force of resilient fingers (23). The plunger (59) has a frangible end (65), which dissociates when the outwardly tapered shoulders (68) spread the resilient fingers (23), allowing the coiled spring (15) to eject the needle (9) and its holder (11) into the interior cavity (71) of the syringe plunger (59). A body fluid sampling embodiment employs the same functional elements except the plunger (59') is shorter and contains a linking needle (137) that communicates with a vacuum container (147). The container allows fluid sampling and provides the structure to release the spring (15') retracting the needle (9').