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:
Jun. 01, 1982
Filed:
Aug. 01, 1980
Joel A Joslin, Sunset Hills, MO (US);
Sherwood Medical Industries, Inc., St. Louis, MO (US);
Abstract
Medicinal fluid to be injected into a patient is drawn into a hypodermic syringe barrel through the valve portion of a combination valve and filter assembly, and is ejected through the filter, thereby preventing particulate contamination of the injected medicine. The valve and filter assembly comprises a generally cylindrical, porous filter element, and an elastomeric valve having a generally annular skirt portion overlying the distal end of the filter element and a central portion extending into the central passage in the filter. The central portion of the valve has a slit therein which opens to permit the flow of medicinal fluid therethrough in a distal-to-proximal direction, but closes to block the flow of fluid therethrough in a proximal-to-distal direction.