Pressing plate for linearized pulses from a peristaltic pump

Details Pressing plate for linearized pulses from a peristaltic pump Pressing plate for linearized pulses from a peristaltic pump

1996-05-21

1998-01-20

McAndrews, Roland G.

Pumps

Expansible chamber type

Elongated flexible chamber wall progressively deformed

4174779, 41747711, F04B 4312

Patent

active

057095396

ABSTRACT:
A peristaltic pump comprises a rotatable drum 2 having rollers 5 or cams 5' for squashing a flexible tube 9 against a profiled surface 10 of a presser plate 7. Tube 9 is mounted between supports 14 and 15 on presser plate 7 and is automatically movable between an inoperative and operative (pumping) position by pivotal movement of plate 7 about axis 8 produced by an electro mechanical actuator. A flexible membrane 33 is sandwiched between rollers 5 or cams 5' for eliminating shear forces on the tube 9. The construction of the pump and shape of profile 10 are such as to mimimise pulsations in the output flow. Systems for supplying a sample for analysis to spectroscopic apparatus using the peristaltic pump are also described.

REFERENCES:
patent: 3591319 (1971-07-01), Shlisky
patent: 3832096 (1974-08-01), Gelfand
patent: 3990444 (1976-11-01), Vial
patent: 4228930 (1980-10-01), Hogan
patent: 4375346 (1983-03-01), Kraus et al.
patent: 4487604 (1984-12-01), Iwatschenko et al.
patent: 5230614 (1993-07-01), Zanger et al.
patent: 5388972 (1995-02-01), Calhoun et al.

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