Peristaltic pump with removable rotor

• US 5,857,843 A
• Filed: 10/18/1996
• Issued: 01/12/1999
• Est. Priority Date: 10/20/1995
• Status: Expired due to Term

• Current Assignee: Haemonetics Corporation
• Original Assignee: Harvest Technologies Corporation (Terumo Corporation)
• Inventors: Jorgensen, Keith J., Leason, John A.
• Primary Examiner(s): Thorpe, Timothy
• Assistant Examiner(s): Gartenberg, Ehud
• Application Number:
  US08/733,913
• Time in Patent Office: 816 Days
• Field of Search: 417/477.9, 417/477.1, 417/238, 417/239, 417/360
• US Class Current: 417/477.9
• CPC Class Codes: A61J 1/05 for collecting, storing or administering blood, plasma or medical fluids multiple bags systems for separating or storing blood components A61M1/0209; Infusion or perfusion containers
• CPC Class Codes: A61J 1/10 Bag-type containers
• CPC Class Codes: A61J 1/1475 Inlet or outlet ports
• CPC Class Codes: A61M 1/3626 Gas bubble detectors
• CPC Class Codes: A61M 1/60 Containers for suction drainage, adapted to be used with an external suction source containers not adapted for subjection to vacuum A61M1/69
• CPC Class Codes: A61M 1/631 Emptying the suction container without interrupting suction
• CPC Class Codes: A61M 1/79 Filters for solid matter specially adapted for dental use A61C17/065
• CPC Class Codes: A61M 2205/3393 by weighing the reservoir
• CPC Class Codes: A61M 2205/75 with filters
• CPC Class Codes: A61M 2206/16 Rotating swirling helical flow, e.g. by tangential inflows
• CPC Class Codes: A61M 39/10 Tube connectors; Tube couplings A61M39/02 takes precedence; connecting needles to syringes or hubs A61M5/34; connecting catheter tubes to hubs A61M25/0014
• CPC Class Codes: A61M 60/109 incorporated within extracorporeal blood circuits or systems
• CPC Class Codes: A61M 60/113 in other functional devices, e.g. dialysers or heart-lung machines
• CPC Class Codes: A61M 60/279 Peristaltic pumps, e.g. roller pumps
• CPC Class Codes: A61M 60/36 for specific blood treatment; for specific therapy
• CPC Class Codes: A61M 60/443 with means converting the rotation into a translational movement of the displacement member
• CPC Class Codes: A61M 60/849 Disposable parts
• CPC Class Codes: B01D 29/036 ring shaped
• CPC Class Codes: B01D 29/908 provoking a tangential stream
• CPC Class Codes: B01D 36/001 Filters in combination with devices for the removal of gas, air purge systems
• CPC Class Codes: F04B 43/0072 : of tubular flexible members
• 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
• CPC Class Codes: F04B 43/1284 : Means for pushing the backing-plate against the tubular flexible member

Abstract

A peristaltic pump has a rotor supported on a frame that is removable in a radial direction with respect to the axis of rotation of the rotor. The rotor is retained in place on the frame by gravity and the forces applied by the opposing pump components.

Claims

1. A peristaltic pump comprising a frame, a platen, means for attaching said platen to said frame, a tube for carrying a fluid to be pumped, and a rotor having an axle shaft extending long an axis, wherein said frame comprises means open on one side for receiving said axle shaft, allowing said rotor to rotate with respect to said platen about said axis, and allowing said rotor and said shaft to be separated from said frame by movement of said axle shaft in a direction tranverse to said axis.

2. A peristaltic pump according to claim 1 wherein said means for receiving said axle shaft comprises at least one semi-circular bearing for engaging said axle shaft of said rotor and for allowing said axle shaft to be inserted into or removed from said bearing.

3. A peristaltic pump according to claim 2 wherein said means for attaching a platen to said frame provides a force on said rotor in said direction transverse to said axis to hold said axle shaft in said bearing during operation.

4. A peristaltic pump according to claim 1 wherein said frame comprises a first part resiliently attached to a second part, said means for receiving said axle shaft is in said first part and said means for attaching said platen is in said second part.

5. A peristaltic pump according to claim 1 wherein said axle shaft comprises drive means for removably connecting a drive motor to said shaft.

6. A peristaltic pump according to claim 5 wherein said drive means comprises a slot in said shaft, said slot extending in said direction transverse to said axis.

7. A peristaltic pump according to claim 1 wherein said platen is removable from said frame, and said means for attaching said platen allows said platen to be removed.

8. A peristaltic pump frame according to claim 1 wherein said frame comprises a first part resiliently attached to a second part, said means for supporting a rotor is in said first part, and said means for securing a platen is in said second part.

9. A peristaltic pump frame comprising means for supporting a rotor for rotation about an axis and means for securing a platen to said frame, wherein said means for supporting comprises means open on one side for receiving an axle shaft of sid rotor, allowing said rotor to rotate with respect to said frame about said axis, and allowing said rotor and said shaft to be separated from said frame by movement of said axle shaft in a direction transverse to said axis.

10. A peristaltic pump frame according to claim 9 wherein said means for securing a platen comprises a clip for removable attachment of said platen to said frame.