WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO1980001825) ASYMMETRIC PERMEABLE MEMBER
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/001825    International Application No.:    PCT/US1979/000107
Publication Date: 04.09.1980 International Filing Date: 22.02.1979
IPC:
C12M 1/24 (2006.01)
Applicants:
Inventors:
Priority Data:
US79/00107 22.02.1979 WO
Title (EN) ASYMMETRIC PERMEABLE MEMBER
(FR) DISPOSITIF PERMEABLE ASYMETRIQUE
Abstract: front page image
(EN)Fluid circulating systems and more particularly for use in bacteriological research where a sterile flask has a plug (110) in the neck thereof and ambient air or other gas is allowed to pass therethrough. A major shortcoming of the use of a cotton plug in the sterile shake flask is the very slow rate of gas exchange through the cotton plug. The present invention provides an improved plug (110) in the manner of an asymmetric permeable member comprising at least one sheet like member (114, 115, 116) for causing the circulation of a gas therethrough. The asymmetric member has numerous shaped pores (116, 120) through it such that the absolute effusional resistance to gas flow is anisotropic. The member is useful in causing the circulation of gases.
(FR)Systemes de circulation de fluide utilises plus particulierement dans la recherche bacteriologique dans lesquels un bouchon (110) est place dans le col d"un ballon sterile et l"air ambiant ou un autre gaz est admis a traverser ce bouchon. Un inconvenient majeur de l"utilisation d"un bouchon en coton dans le flasque ou ballon sterile d"agitation est la vitesse tres faible d"echange gazeux au travers du bouchon de coton. Le bouchon ameliore (110) se presente sous la forme d"un organe permeable asymetrique comprenant au moins un element en feuille (114, 115, 116) permettant la circulation d"un gaz. L"organe asymetrique possede de nombreux pores (116, 120) de telle sorte que la resistance absolue a l"ecoulement du gaz par diffusion est anisotrope. L"organe est utile a la circulation des gaz.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)