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. 16, 1998
Filed:
May. 10, 1996
Applicant:
Inventor:
Wolfram Langkau, Steinbach, DE;
Assignee:
Fresenius AG, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61M / ;
U.S. Cl.
CPC ...
604 93 ; 604 43 ; 604140 ; 604141 ; 141-3 ; 141-4 ; 141-9 ; 141 65 ;
Abstract
A process for the filling of the pumping chamber of a gas pressure driven medicine pump. A pillow filled with the propellant is formed which consists of a material permeable to the propellant. The pillow filled with the propellant is inserted into the propellant chamber which is evacuated. Then, the propellant chamber is sealed gas tight. Subsequently, the propellant diffuses through the wall of the pillow into the propellant chamber. The process according to the invention offers the possibility of filling the pumping chamber in a simple manner without allowing the penetration of foreign gases.