Peristaltic pump having pivotal reaction means

• US 3,876,340 A
• Filed: 08/09/1973
• Issued: 04/08/1975
• Est. Priority Date: 08/09/1972
• Status: Expired due to Term

• Current Assignee: Alan John Thomas
• Original Assignee: Alan John Thomas
• Inventors: Thomas, Alan John
• Primary Examiner(s): Husar, C. J.
• Assistant Examiner(s): Gluck, Richard E.
• Application Number:
  US05/386,883
• Time in Patent Office: 607 Days
• Field of Search: 417/475,477
• US Class Current: 417/475
• CPC Class Codes: F04B 43/1223 the actuating elements, e.g. rollers, moving in a straight line during squeezing
• CPC Class Codes: F04B 43/1284 Means for pushing the backing-plate against the tubular flexible member
• CPC Class Codes: F04B 43/1292 Pumps specially adapted for several tubular flexible members

Abstract

A peristaltic pipe in which there are several side-by-side flexible pumping tubes each having its own set of pumping rollers which are moved sequentially into a tube flattening position, along the tube for a predetermined length and then cut out of contact with the tube to perform the pumping action. Each tube has its own support against which it is pressed by the rollers and the support is resiliently yieldable in order to avoid placing excess flattening pressures on the tube. In a preferred case, each support is a spring loaded block which may be of resilient material, each set of rollers is carried on a rotatable spider, and the spiders are rotatable simultaneously.

Claims

1. A peristaltic pump comprising several side-by-side deformable tubes located in parallel planes, several sets of rollers, one set for each tube, the rollers of each set being arranged to be brought into successive moving contact with the aforesaid tubes whereby each roller flattens the associated tube over a portion of its length and is moved unidirectionally along the tube and is released from the tube, several reaction means, one for each tube, each reaction means comprising an endless belt of which one face forms a resiliently yieldable surface located to act as an abutment against which the tube will be presented by the associated rollers, and which each belt is supported for pivotal movement about a pivot axis, and spring means acting on the belt at a point spaced from said axis for urging the belt into contact with the associated tube.

2. A pump as claimed in claim 1, in which each belt is shaped to present a longitudinal groove to receive the associated tube, and the belt is of a compressive material.

3. A pump as claimed in claim 2 in which the groove is formed in the thickness of the belt.