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US 2003/0190245 A1Published application
Peristaltic pumps
AssigneeConstance Limited
InventorsJohn Graham Hedington, Stuart Richard Page
Life of this patent
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AssigneeConstance Limited
InventorsJohn Graham Hedington, Stuart Richard Page
Estimating the term…
A peristaltic pump mechanism comprises a base plate (11) having a generally planar surface for supporting a pump tube (12) to extend at least partially around a circular path defined on said surface, an operating section (10) connectable to the base member (11). At least one rotatable pumping element (21) is mounted on the operating section (10) locally to compress the pump tube (12) and roll around the circular path when the operating section (10) is connected to the base member. A power drive causes the pumping element (21) to roll around the circular path, the pumping element (21) being of conical shape and mounted on the operating section (10) so that the axis of the element is substantially co-incident with the centre of the circular path. In this way essentially no slippage takes place between the conical surface of the pumping element and the planar surface of the base plate.
A peristaltic pump mechanism comprising a base plate having a generally planar surface for supporting sheet of flexible plastics material within which is defined a part-circular pump tube which will extend partially around a circular path defined on said surface when the sheet is located thereon, an operating section connectable to the base member, three like rotatable pumping elements arranged with their axes substantially at 120° to each other and mounted on the operating section locally to compress the pump tube and roll around the circular path when the operating section is connected to the base member, and power drive means to cause the pumping elements to roll around the circular path, each pumping clement being of conical shape and mounted on the operating section so that the axis of the element is substantially co-incident with the centre of the circular path in the plane of the planar surface whereby essentially no slippage takes place between the conical surface of each pumping element and a flexible sheet supported on the planar surface of the base plate.
A peristaltic pump as claimed in any of the preceding claims, wherein the base plate and operating section have co-operating means to locate said sheet in a pre-defined position on the base plate.
A peristaltic pump as claimed in any of the preceding claims, wherein there are means for flattening the sheet of plastics material in a region where the pump tube is to be compressed by the pumping element.
A peristaltic pump as claimed in any of the preceding claims, wherein the power drive means includes an electric motor drivingly coupled to the or each pumping element.
A peristaltic pump as claimed in any of the preceding claims, wherein the pumping element has a cone angle of from 45° to 75°.
A peristaltic pump as claimed in any of the preceding claims in combination with a peristaltic pump tube component arranged to deliver liquid in a controlled manner from a source to some other site, which component comprises a pair of overlying flexible sheets bonded together to define a tube-like passageway therebetween and which extends from one common edge of the sheets to another common edge of the sheets, a portion of the passageway intermediate the ends thereof being of part-circular shape for compression by the three pumping elements rolling around a circular path coincident with said portion of the passageway of part-circular shape when the component is mounted on the peristaltic pump, the ends of the passageway being configured to permit the connection thereto of ducts for the transfer of liquid to and from the passageway, and the sheets being profiled and adapted to permit the connection thereto of the peristaltic pump device co-operable with the tube-like passageway to control the flow of liquid through the passageway.
Dependencies are inferred from the claim text.