Title:
ROTARY PERISTALTIC PUMP
Document Type and Number:
WIPO Patent Application WO/1983/001984
Kind Code:
A1
Abstract:
A rotary peristaltic pump comprises a rotor member (4) fitted in a stator member (5) and coupled to a motor (2) and having a cylindrical head section (6) housing a plurality of pump tube compressing idler rollers (7) equidistantly radially disposed around the head section, with their longitudinal axes parallel to the axis of the head section. The rollers are positioned in an annular recess (8) in the periphery of the head section, the root periphery of the recess being grooved (17) to accept each compressing idler roller such that a substantial part of each roller protrudes into the annular recess. The stator member (5) comprises a base section (9) and wall section (10) defining an axial opening (11) to accomodate the cylindrical head section and has pump tube entry ports (12, 13) in the wall (10) for tangential communication with the annular recess. Stator member (5) may slide along the rotor shaft (31) to facilitate service to the rotor elements and tube. Rotor member (4) may also include pump tube stabilising idler rollers in the annular recess and a magnetic element to facilitate pump control in conjunction with an electronic control circuit.
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Inventors:
HACKMAN CHARLES HENRY (AU)
Application Number:
PCT/AU1982/000195
Publication Date:
June 09, 1983
Filing Date:
November 23, 1982
Export Citation:
Assignee:
HACKMAN CHARLES HENRY
International Classes:
F04B43/12; (IPC1-7): F04B43/12
Domestic Patent References:
| WO1981002331A1 | 1981-08-20 |
Foreign References:
| US3649138A | 1972-03-14 | |||
| US3249059A | 1966-05-03 | |||
| US4138205A | 1979-02-06 | |||
| US3105447A | 1963-10-01 | |||
| US2831437A | 1958-04-22 | |||
| US2987004A | 1961-06-06 |
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Claims:
CLAIMS :
| 1. | A rotary peristaltic pump adapted to be fitted wit motor drive means and pump tubing for connection to a sourc of fluid, said pump pomprising: a rotor member adapted for operative coupling to the motor drive means and having a circular head section housing a plurality of pump tubingcompressing idler rollers in approximately equidistant radially disposed positions for idle rotation axially parallel to the axis of rotation of the rotor member in the course of rotation of said rotor member, the circular head section having a circumferential recess defining a race compartment for said pump tubing compressing idler rollers so that a substantial part of the circumferential face of each pump tubingcompressing idler roller protrudes into the race compartment; and a stator member having a base section and a wall section with inner faces which define an axial opening for accommo¬ dating the circular head section of the rotor member and having pump tubing entry and exit ports in the wall section for tangential communication with said race compartment of the rotor member; said pump tubing being fitted to the pump by loading into the race compartment via said pump tubing entry port, then passing around the race compartment to exit therefrom via said pump tubing exit port, whereby the portion of the pump tubing in said race compartment is successively contacted by the protruding circumferential faces of the pump tubing compressing idler rollers in the course of rotation of said rotor member and is thereby compressed between said inner face of the stator member wall section and said circumferent ial faces of the pump tubingcompressing idler rollers to effect peristaltic pumping of fluid in said pump tubing. |
| 2. | A rotary peristaltic pump according to claim 1 wherein said rotor member is slideably displaceable axially of the stator member through a coaxial opening in said base section of the stator member for accommodating a drive shaft section of the rotor member, the length of said drive shaft section being such that the rotor member can be dis placed axially of the stator member sufficiently to give access to the pump tubingcompressing idler roller and th part of the pump tubing in said race compartment for inspection and pump tubing adjustment and pump tubing replacement. |
| 3. | A rotary peristaltic pump according to claim 1 wherein the circular head section of the rotary member comprises an inner flange member and an outer flange memb joined in spacedapart relationship by an axial cylindric midsection so as to form said circumferential recess defining the race compartment, said inner flange member a outer flange member and axial cylindrical midsection joi ly housing said plurality of pump tubingcompressing idle rollers in approximately equidistant radially disposed position so that the circumferential faces of the pump tubingcompressing idler rollers bear into the circumfere tial face of said axial cylindrical midsection. |
| 4. | A rotary peristaltic pump according to claim 3 wherein the circumferential face of said axial cylindrica midsection is arcuately recessed longitudinally correspo ing to the number of pump tubingcompressing idler roller and conforming with the diameter of each said pump tubing compression idler roller so that a nonsubstantial part o the circumferential face of each said pump tubingcompres ing roller bears against said axial cylindrical midsecti and a substantial part of the circumferential face of eac said pump tubingcompressing roller protrudes into said r compartment. |
| 5. | A rotary peristaltic pump according to claim 3 wherein the inner flange member and the outer flange memb are integral with the axial cylindrical midsection, the inner flange member having approximately equidistant radi disposed recesses forming endseating cavities for inner en of said plurality of pump tubingcompressing idler roller the outer flange member having correspondingly approximat equidistant radially disposed apertures forming endbeari openings for outer ends of said plurality of pump tubing compressing idler rollers, and an outer end plate remova connected to the outer flange member for retaining said plurality of pump tubingcompressing idler rollers in sa inner endseating cavities and said outer endbearing openings. |
| 6. | A rotary peristaltic pump according to claim 5 wherein the opposite ends of each pump tubingcompressin roller are conically pointed, and corresponding bearing faces of said inner endseating cavities and of said out er end plate are flat. |
| 7. | A rotary peristaltic pump according to claim 3 wherein the inner flange member is integral with the axi cylindrical midsection and the outer flange member is a disc member nonintegral with the axial cylindrical mid section, the inner flange member having approximately equ distant radially disposed recesses forming endseating cavities for inner ends of said plurality of pump tubing comprising idler rollers, the disc member having correspo ingly approximately equidistant radially disposed recesse forming endseating cavities for outer ends of said plurality of pump tubingcompressing idler rollers, and said disc member being removably connected to said axial cylindrical midsection for retaining said plurality of pump tubingcompressing idler rollers in said inner end seating cavities and said outer endseating cavities. |
| 8. | A rotary peristaltic joump according to claim 7 wherein the opposite ends of each pump tubingcompressing roller are conically pointed and corresponding bearing faces of said inner endseating cavities and said outer endseating cavities are flat. |
| 9. | A rotary peristaltic pump according to claim 1 wherein the circular head section of the rotor member als houses a plurality of pump tubingstabilizing idler rolle in approximately equidistant radially disposed positions between the approximately equidistant radially disposed positionsof the pump tubingcompressing idler rollers for idle rotation axially parallel to the axis of rotation of the rotor member in the course of rotation of said rotor member, so that a nonsubstantial part of the circumferent face of each pump tubingstabilizing idler roller protrude into said race compartment whereby the portion of the pump tubing in said race compartment is successively contacted by the protruding circumferential faces of the pump tubing stabilizing idler rollers in the course of rotation .of sai rotor member and is thereby frictionally restrained betwee said inner face of the stator member wall section and said circumferential faces of the pump tubingstabilizing idler rollers to counter a tendency of the pump tubing to move within said race compartment. |
| 10. | A rotary peristaltic pump according to claim 9 wherein the circular head section of the rotary member comprises an inner flange member and an outer flange membe * joined in spacedapart relationship by an axial cylindrica midsection so as to form said circumferential recess defining the race compartment, said inner flange member an outer flange member and axial cylindrical midsection join ly housing said plurality of pump tubingcompressing idler rollers in approximately equidistant radially disposed positions so that the circumferential faces of the pump tubingcompressing idler rollers bear into the circumferen tial face of said axial cylindrical midsection. |
| 11. | A rotary peristaltic pump according to claim 10 wherein the circumferential face of said axial cylindrical midsection is arcuately recessed longitudinally correspon to the number of pump tubingcompressing idler rollers and conforming with the diameter of each said pump tubing compressing idler roller so that a nonsubstantial part of circumferential face of each said pump tubingcompressing roller bears against said axial cylindrical midsection an substantial part of the circumferential face of each said tubingcompressing roller protrudes into said race compart and the circumferential face of said axial cylindrical mid section is also arcuately recessed longitudinally correspo ing to the number of pump tubingstabilizing idler rollers and conforming with the diameter of each said pump tubing stabilizing roller so that a substantial part of the cir¬ cumferential face of each said pump tubingstabilizing roller bears against said axial cylindrical midsection and a nonsubstantial part of the circumferential face of each said pump tubingstabilizing roller protrudes into said race compartment. |
| 12. | A rotary peristaltic pump according to claim 10 wherein the inner flange member and the outer flange membe are integral with the axial cylindrical midsection, the inner flange member having approximately equidistant radia disposed recesses forming endseating cavities for inner e of said plurality of pump tubingcompressing idler rollers and for inner ends of said plurality of pump tubingstabil izing idler rollers, the outer flange member having corr¬ espondingly approximately equidistant radially disposed apertures forming end^bearing openings for outer ends of said plurality of pump tubingcompressing idler rollers an for outer ends of said plurality of pump tubingstabilizin idler rollers, and an outer end plate removably connected the outer flange member for retaining said plurality of pu tubingcompressing idler rollers and pump tubingstabilizi idler rollers in said inner endseating cavities and said outer endbearing openings. |
| 13. | A rotary peristaltic pump according to claim 12 wherein the opposite ends of each pump tubingcompressing roller and each pump tubingstabilizing roller are conical pointed and corresponding bearing faces of said inner end seating cavities and of said outer end plate are flat. |
| 14. | A rotary peristaltic pump according to claim 9 wherein the circumferential face of each pump tubingstabi izing idler roller has a concave contour substantially corresponding to the diameter of the pump tubing. |
| 15. | A rotary peristaltic pump according to claim 1 wherein the circular head section of the rotor member is integral with a drive shaft section of the rotor member which is adapted to be removably fitted to said motor dri means. |
| 16. | A rotary peristaltic pump according to claim 15 wherein a magnet is incorporated in the drive shaft secti of the rotor member for positionsensing in conjunction with means statically mounted for accurate metering and control of delivered volume, and for limitation of axial movement of said rotor member to prevent disassembly during replacement of pump tubing, and for axial and angu location of a motor drive means shaft into said drive sha section of the rotor member. |
| 17. | A rotary peristaltic pump according to claim 1 wherein the circular head section is nonintegral with a drive shaft section of the rotor member which is adapted to be removably connected to the circular head section an adapted to be removably fitted to said motor drive means. |
| 18. | A rotqry peristaltic pump according to claim 17 wherein a magnet is incorporated in the drive shaft secti of the rotor member for positionsensing in conjunction w means statically mounted for accurate metering and contro of delivered volume, and for limitation of axial movement of the rotor member to prevent disassembly during replace ment of pump tubing. |
| 19. | A rotary peristaltic pump according to claim 17 wherein the drive shaft section of the rotor member compr a torque transfer member removably connected to the circu head section of the rotor member andremovably fitted to a motor drive means shaft. |
| 20. | A rotary peristaltic pump according to claim 19 wherein the torque transfer member of said drive shaft se of the rotor member is in the form of a cylinder having a axially disposed spindle and adapted for removable connec to said motor drive means shaft and for removable connect to said drive shaft section of the rotor member, said axi disposed spindle adapted to be inserted into a correspond O axially disposed cavity in the circular head section of the rotor member for removable connection of the torque transfer member to said circular head section. |