Process for the filing of a propellant chamber of a gas driven p

Details Process for the filing of a propellant chamber of a gas driven p Process for the filing of a propellant chamber of a gas driven p

1996-05-10

1998-06-16

Bockelman, Mark

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604 43, 604140, 604141, 141 3, 141 4, 141 9, 141 65, A61M 1100

Patent

active

057661502

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.

REFERENCES:
patent: 3840009 (1974-10-01), Michaels et al.
patent: 4604090 (1986-08-01), Reinicke
patent: 5167633 (1992-12-01), Mann et al.
patent: 5197322 (1993-03-01), Indravudh
patent: 5514103 (1996-05-01), Srisathapat et al.

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