Cartridge for peristaltic pump

• US 4,178,138 A
• Filed: 04/26/1977
• Issued: 12/11/1979
• Est. Priority Date: 05/05/1976
• Status: Expired due to Term

• Current Assignee: Victor Pyrate Limited
• Original Assignee: Frank Iles
• Inventors: Iles, Frank
• Primary Examiner(s): Croyle, Carlton R.
• Assistant Examiner(s): Ross, Thomas I.
• Application Number:
  US05/790,892
• Time in Patent Office: 959 Days
• Field of Search: 417/477, 417/476, 417/475, 417/360, 418/45, 418/56, 418/39, 418/70, 29/156.4 R, 222/209, 222/214, 222/325
• US Class Current: 417/360
• CPC Class Codes: F04B 43/1253 by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing

Abstract

A cartridge for a peristaltic pump comprises two parts having a frusto-conical bore extending through the two parts and a dovetail section groove encircling the bore at the joint between the two parts. A liquid carrying tube extends into the cartridge and has a convolution encircling the bore. The tube has an integral dovetail section rib extending along the length thereof which engages in the dovetail section groove encircling the bore to locate the tube in the bore. The cartridge is used with a pump having a rotor with one or more rollers mounted eccentrically thereon to rotate about axes convergent with the rotor axis. The rollers compress and flatten the tube where they engage it so that as the rollers rotate around the bore in the cartridge, liquid in the tube is displaced along the tube in a continuous flow.

Claims

1. A peristaltic pump comprising

body means having a chamber with an open mouth;

a rotary member mounted in said body means for rotation in said chamber; and

a cartridge adapted to be releasably mounted in said chamber through said open mouth, said cartridge comprising

a housing with a bore for receiving said rotary member when said cartridge is mounted in said chamber,

a tube with a flexible wall extending through said housing, said tube having a convolution with at least a part thereof encircling said bore,

a rib integrally mounted on said tube and extending along the longitudinal extent thereof, said rib narrowing in cross section to a neck adjacent said tube, and

a recess formed in said housing and encircling said bore, said recess having a width similar to that of said neck to entrap the rib therein and thereby hold said tube in said bore;

said rotary member being rotatable about the axis of the bore and having at least one eccentrically mounted element thereon for engaging and pressing the wall of the tube; and

clamping means for releasably holding said cartridge in said chamber, said clamping means including

openings on opposite sides of the encircling wall of said chamber,

a pair of pins extending through said body means with one pin on each side of said body means;

resilient biasing means for resiliently biasing said pins so that the side portions thereof project into said chamber through said openings;

a groove on the outer surface of said cartridge adapted to receive the side portions of said pins, and

releasable locking means for holding said pins in said opening to hold said cartridge in place when located in said chamber;

whereby, upon rotation of said rotary member when said cartridge is in said chamber, said rotary member traverses said convolution and, by depressing said tube, causes fluid in said tube to flow.

2. A pump according to claim 1, wherein said locking means includes a manual control which in a first position releases said pins for movement against said biasing means, which in a second position prevents said pins from moving out of said openings, and which in a third position both prevents said pins from moving out of said openings and energizes a motor for rotating said rotary member.

3. A peristaltic pump comprising

body means having a chamber with an open mouth;

a rotary member mounted in said body means for rotation in said chamber;

a cartridge adapted to be releasably mounted in said chamber through said open mouth, said cartridge comprising

a housing with a bore for receiving said rotary member when said cartridge is mounted in said chamber,

a tube with a flexible wall extending through said housing, said tube having a convolution with at least a part thereof encircling said bore,

an integral rib integrally mounted on said tube and extending along the longitudinal extent thereof, said rib narrowing in cross section to a neck adjacent said tube;

a recess formed in said housing and encircling said bore, said recess having a width similar to that of said neck to entrap the rib therein and thereby hold said tube in said bore; and

clamp means for releasably holding said cartridge in said chamber comprising

openings on opposite sides of the encircling wall of said chamber,

a pair of pins extending through said body means with one pin on each side of said body means;

resilient biasing means for resiliently biasing said pins so that the side portions thereof project into said chamber through said openings,

a groove on the outer surface of said cartridge adapted to receive the side portions of said pins, and

releasable locking means for holding said pins in said openings to hold said cartridge in place when located in said chamber.

whereby, upon rotation of said rotary member when said cartridge is in said chamber, said rotary member traverses said convolution, and by depressing said tube, causes fluid in said tube to flow.

4. A pump according to claim 3, wherein said locking means includes a manual control which in a first position releases said pins for movement against said biasing means, which in a second position prevents said pins from moving out of said openings, and which in a third position both prevents said pins from moving out of said openings and energizes a motor for rotating said rotary member.