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:
Mar. 03, 1981
Filed:
Nov. 19, 1979
Wilburn C Willis, Hagerstown, IN (US);
Aluminum Company of America, Pittsburgh, PA (US);
Abstract
An additive transfer unit for transferring a measured volume of a liquid medicament into an evacuated container. The unit comprises a liquid storage container, a rigid disc closing the mouth of the container, a rigid piercing member formed integrally with the disc and having an aperture defining a passageway from the interior to the exterior of the container, a penetrable protective tip providing a seal over a needle point on the piercing member, and a metal closure. An elastic sealing means around and contiguous the outside diameter of the disc provides, with the disc, a fluid-tight seal over the mouth of the container. The disc includes a cylindrical hub spaced radially outwardly of the piercing member and abutting against an inner portion of the sealing means to stabilize the sealing means against the metal closure. The protective tip includes a portion deflecting radially outwardly of the piercing member in response to a positive pressure differential in the interior of the container, thereby venting a portion of the container contents into a cavity between the metal closure and piercing member.