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:
Sep. 16, 1997
Filed:
Apr. 21, 1995
Ralf V Bitdinger, Herbeys, FR;
Jean Pierre Grimard, Vif, FR;
Becton Dickinson France S.A., Le Ponte de Claix, FR;
Abstract
A backstop device to prevent inadvertent withdrawal of a stopper from the open distal end of a syringe barrel. The backstop, mounted to a syringe flange, includes a pair of spaced apart plates located on either side of the flange. Both plates include respective apertures accessible through lead openings formed through the plates. The bottom aperture is formed for snug contact with the syringe barrel, while the upper aperture includes a ridge engageable with the interior of the syringe barrel adjacent the open distal end. The top aperture and ridge together present a smaller passageway than the diameter of the stopper, preventing inadvertent removal thereof. The backstop can be placed on the syringe regardless of the presence or absence of the plunger.