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EP0078645A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Peristaltic pump tube assembly

Assignee: Hospital for Sick Children
•
Filing: 1982-10-22
•
Granted: —
•
Expires: 2002-10-22
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Abstract

Abstract A tube assembly (24) for a peristaltic pumping system is described. The assembly (24) includes resilient inner and outer tubes (42) and (44) of which the inner tube (42) has a lumen (46) along which liquid can be pumped by occluding the tube (42) and causing the point of occlusion to progress along a length of the tube defining a pumping zone (48). The outer tube (44) fits closely around the inner tube (42) and extends over said zone (48). The tubes (42) and (44) are free of attachment to one another over at least a substantial part of said zone (48) so that the contacting surfaces of the respective tubes (42) and (44) define an interface along which relative movement between the tubes (42) and (44) can occur during pumping. The tubes (42) and (44) are secured together at at least one point (50) or (52) along their lengths. It has been found that abrasion of the innermost surfaces of the inner tube (42) is minimized and that reduced contamination of the liquid being pumped and increased pump tube life can be expected as compared with conventional peristaltic pump tubes.

Inventors

  • 👤 Anthony Michael Albisser
  • 👤 Warren Samuel Jackman

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 22:49
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/14212; A61M5/14228; A61M39/00; A61M39/08; F; F04; F04B; F04B43/00; F04B43/12; F04B43/1253; F04B43/1292

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 148 words
A tube assembly for a peristaltic pumping system, the assembly being characterised by: a resilient inner tube (42) having a lumen (46) along which liquid can be pumped by occluding the tube (42) and causing the point of occlusion to progress along a length (48) of the tube defining a pumping zone; by an outer resilient tube (44) fitting closely around said inner tube (42) and extending over a length of the inner tube which includes said pumping zone (48); and by said tubes (42) and (44) being free of attachment to one another over at least the majority of the length of such zone (48) so that the contacting surfaces of the respective tubes (42) and (44) define an interface along which relative movement between the tubes can occur during pumping, said tubes being secured together at at least one point (50) or (52) along their lengths.
Claim 2
Dependent Claim 148 words
A tube assembly for a peristaltic pumping system, the assembly being characterised by: a resilient inner tube (42) having a lumen (46) along which liquid can be pumped by occluding the tube (42) and causing the point of occlusion to progress along a length (48) of the tube defining a pumping zone; by an outer resilient tube (44) fitting closely around said inner tube (42) and extending over a length of the inner tube which includes said pumping zone (48); and by said tubes (42) and (44) being free of attachment to one another over at least the majority of the length of such zone (48) so that the contacting surfaces of the respective tubes (42) and (44) define an interface along which relative movement between the tubes can occur during pumping, said tubes being secured together at at least one point (50) or (52) along their lengths.
Claim 3
Dependent Claim 31 words
An assembly as claimed in claim 1, characterised in that the nominal outside diameter of the inner tube (42) is equal to the nominal inside diameter of the outer tube (44).
Claim 4
Dependent Claim 29 words
An assembly as claimed in claim 1, characterised in that the tubes (42) and (44) are secured together at respective end portions (50, 52) of said outer tube (44).
Claim 5
Dependent Claim 34 words
An assembly as claimed in claim 1, characterised in that said outer tube (44) is provided with at least one external collar (38) or (40) for locating said assembly (24) in a pumping system.
Claim 6
Dependent Claim 25 words
An assembly as claimed in claim 1, characterised in that each of said tubes (42) and (44) is manufactured of medical grade silicone elastomeric tubing.

References Cited (Backward Citations)

US2483924A Cited
US3105447A Cited
US3875970A Cited

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