Device for administering a liquid in a number of doses

Details Device for administering a liquid in a number of doses Device for administering a liquid in a number of doses

1985-12-19

1987-02-17

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604236, 604256, A61M 500

Patent

active

046437231

ABSTRACT:
A device for administering a liquid in a number of doses, such as insulin to a patient, comprising a piston (3) in a pump chamber (4), a cannula (5) being connectable to the pump chamber, a piston rod (14) connected to the piston and having an operating button (25), a valve (1) and a reservoir (2), wherein by retracting the piston (3), at the same time the reservoir is connected to the pump chamber (4) through the valve in order to fill the pump chamber and the valve is moved into the position for closing the connecting element (6) between the pump chamber and the cannula (5) and wherein, by moving the piston forward, at the same time the connecting element between the pump chamber and the cannula is connected through the valve to the pump chamber and the valve is moved into the position for closing the passage (7) between the reservoir and the pump chamber.

REFERENCES:
patent: 3957052 (1976-05-01), Topham
patent: 4449693 (1984-05-01), Gereg

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