Double piston pump for administering medication

Details Double piston pump for administering medication Double piston pump for administering medication

1994-05-10

1996-06-18

Shaver, Kevin P.

Dispensing

With discharge assistant

Plural

417535, G01F 1100

Patent

active

055269621

ABSTRACT:
The device of the invention provides preselected doses of liquid medicine and has a cylinder assembly (1, 2) with a left cylinder (1), a right cylinder (2) and a double piston (4, 5) displaceably mounted in the assembly with a left piston end (4) and a right piston end (5). A coupling links the double piston in a positive and/or frictional manner with a drive unit (15). The device is controlled passively by two automatically closing intake valves (7, 8) and two discharge valves (11, 12). Thereby a continuous flow of liquid medicine 20 out of the medicine container 10 can be generated.

REFERENCES:
patent: 218245 (1879-08-01), Duwelius
patent: 664947 (1901-01-01), Hanna
patent: 1854773 (1932-04-01), Tannehill
patent: 2023250 (1935-12-01), Stalder
patent: 2998164 (1961-08-01), Clements
patent: 3216627 (1965-11-01), Best et al.
patent: 4149658 (1979-04-01), Teufel
patent: 4394940 (1983-07-01), Peterson
patent: 4443163 (1984-04-01), Gaither
patent: 4512188 (1985-04-01), Erickson
patent: 5058768 (1991-10-01), Lichfield
patent: 5076769 (1991-12-01), Shao
patent: 5390585 (1995-02-01), Ryuh

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