To provide an inexpensive volumetric pump capable of purging bubbles from a pump chamber, easy of accurate flow control and suitable for an IV filling set.
The volumetric pump comprises a slender chamber 8 inside and a housing open at one end and closed at the other end. An elastic material sheet open at the center covers the opening end. A pump shaft 60 is inserted through the opening of the sheet into the chamber to form a sphincter seal in the opening in cooperation with the sheet material. The other end extends to the outside. The opening has a cross section shape substantially the same as that of the shaft and a cross section size the same as or smaller than that thereof. A fluid inlet 36 is provided near the opening end of the housing so that fluid is supplied from a fluid source into the chamber 8. A fluid outlet 40 is provided near the closed end of the housing so that the fluid is supplied through the outlet from the chamber 8 to a fluid sink.
JPH09170551 | DEODORIZING DEVICE OF ELECTROMAGNETIC PUMP |
DAVIS CLARK C
Hajime Asamura
Yukio Iwamoto
Toru Mori