Pump arrangement for medical purposes

Details Pump arrangement for medical purposes Pump arrangement for medical purposes

1985-03-07

1987-01-06

Pellegrino, Stephen C.

Surgery

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

Treating material introduced into or removed from body...

604153, 604 4, 128DIG12, 417395, A61M 3700

Patent

active

046344306

ABSTRACT:
Pump arrangement (10) for medical purposes, in particular blood or infusion pump, comprising a pump housing (12) having two pump chambers (16, 18), of which the work chamber (16) is subjected to the liquid to be pumped while the drive chamber (18) is connected via a connecting conduit to a pneumatic pump (14) of restricted pumping volume.
This connecting conduit (50) comprises a valve (56) which is opened at the respective changeover point (top and bottom dead-center) of the pump (14) to set the entire pump arrangement (16) to atmospheric pressure.

REFERENCES:
patent: 2311229 (1941-04-01), Herbert
patent: 2855144 (1958-10-01), Andreasen
patent: 3213804 (1961-12-01), Sobey
patent: 4265600 (1981-05-01), Mandroian
patent: 4303376 (1981-12-01), Siekmann
patent: 4552552 (1985-11-01), Polaschegg et al.

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