Peristaltic pump having pumping and occluding rollers and...

Details Peristaltic pump having pumping and occluding rollers and... Peristaltic pump having pumping and occluding rollers and...

2005-11-18

2009-08-25

Kramer, Devon C (Department: 3746)

Pumps

Expansible chamber type

Elongated flexible chamber wall progressively deformed

C417S474000, C417S476000, C417S477100

Reexamination Certificate

active

07578662

ABSTRACT:
A peristaltic roller pump includes a rotor carrying a pumping roller on one end and an occluding roller on the other end. Occluding roller has a number of protrusions designed to only occlude the tubing section that is located under that roller as it moves over it in order to prevent any back flow through that section of the tube. Occluding roller is designed to not cause any pumping of fluid through the section of the tubing under that roller. Such design is useful in a single-needle dialysis system and in other alternating pumping systems in which during a first phase of the pumping the fluid is moved in one direction and during the second phase of operation the fluid is moved in the opposite direction.

REFERENCES:
patent: 3848592 (1974-11-01), Willock
patent: 3938909 (1976-02-01), Willock
patent: 4755168 (1988-07-01), Romanelli
patent: 4906168 (1990-03-01), Thompson
patent: 5064358 (1991-11-01), Calari
patent: 5415532 (1995-05-01), Loughnane
patent: 5630711 (1997-05-01), Luedtke
patent: 5897300 (1999-04-01), Luedtke
patent: 5927951 (1999-07-01), Tamari
patent: 6506035 (2003-01-01), Beck et al.
patent: 6810713 (2004-11-01), Hahn et al.
patent: 2003/0143754 (2003-07-01), Lum et al.
patent: 2006/0177328 (2006-08-01), Nordell et al.

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