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:
Dec. 08, 1998
Filed:
Nov. 22, 1996
Applicant:
Inventor:
Georgios Psaros, Tullinge, SE;
Assignee:
Siemens Elema A.B., Solna, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61M / ;
U.S. Cl.
CPC ...
12820024 ; 12820312 ; 12820325 ;
Abstract
In a dosing device and method for controlled dosing of a first gas into a second gas or liquid membrane which is permeable to the first gas separates the first gas from the second gas or liquid. Dosing of the first gas is performed by controlling diffusion through the membrane. The size of the active diffusion area can be regulated by a barrier which is moveable in relation to the membrane. When the barrier is moved in relation to the membrane, a larger or smaller part of the membrane's diffusion area can be exposed to the second gas or liquid. Alternatively, the membrane's permeability can be controlled or the partial pressure of the first gas can be controlled.