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:
Apr. 18, 1995
Filed:
Sep. 27, 1993
Michael J Botich, Oxnard, CA (US);
Thor Halseth, Simi Valley, CA (US);
Med-Design Inc., Ventura, CA (US);
Abstract
A hypodermic injection system (7) with a retractable needle (9) wherein the needle (9) retracts within an interior cavity of a syringe plunger (59), such that the needle (9) is confinedly held within the plunger (59). A cylindrical spring housing assembly (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 plunger (59). A body fluid sampling embodiment employs the same functional elements except the plunger (59') is shorter and contains a linking (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'). The retractable needle embodiment is also employed with an insertion needle (9'') that guides a catheter tube (154) below the skin of a patient and into the vein, and allows retraction of the insertion needle (9'') thereby avoiding accidental pricking of the health care worker by the insertion needle (9'').