Easy load peristaltic pump

• US 4,558,996 A
• Filed: 06/30/1983
• Issued: 12/17/1985
• Est. Priority Date: 06/30/1983
• Status: Expired due to Term

• Current Assignee: SORB Technology, Inc. (Fresenius Medical Care AG)
• Original Assignee: Organon Teknika Corporation (Merck & Co., Inc.)
• Inventors: Becker, Harold D.
• Primary Examiner(s): Gluck, Richard E.
• Application Number:
  US06/510,075
• Time in Patent Office: 901 Days
• Field of Search: 417/477, 417/476, 417/475, 417/374
• US Class Current: 417/374
• 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 43/1276 Means for pushing the rollers against the tubular flexible member
• CPC Class Codes: F04B 43/1284 Means for pushing the backing-plate against the tubular flexible member

Abstract

There is provided a peristaltic pump which has a base member and a rotor attached to the base member. The rotor is adapted to receive a resilient collapsible tube. The pump further includes a stator having a fixed member disposed in a permanent position relative to the rotor. A door stator is connected to the fixed stator, and the entire stator will confront the periphery of the rotor over at least uninterrupted 180° concave surface. A latch is provided on the door stator, so that it may pivot outward for ease of removal of the tubing.

Claims

1. A peristaltic pump, comprising:

(a) a base member;

(b) a rotor rotably disposed about an axis normal to said base member and receiving a resilient collapsible tube having inlet and outlet sections placed about said rotor;

(c) stator, comprising;

(1) a fixed stator member disposed in a permanent position relative to said rotor and said collapsible tube; and

(2) a door stator member hingedly connected to said fixed stator capable of being received by said fixed stator in tight-fitting engagement, said door stator member having hingedly connected thereto a lid member defining one side of the pump,

said stator having a concave face when the fixed stator member and door stator member are in tight-fitting engagement confronting the periphery of said rotor over at least an uninterrupted 180°

of said periphery so as always to provide within said concave face an occludably tight engagement for said resilient collapsible tube between said stator and said rotor regardless of the orientation of the rotor, and further, whereby said door stator member and lid member may be disengaged from said rotor to facilitate removal or repair of said collapsible tube.

2. A peristaltic pump according to claim 1, wherein the rotor is secured by and rotated around axle connected to said base member said axle having a longitudinal axis normal to the base member.

3. A peristaltic pump according to claim 1, wherein the rotor has at least two arms for engaging said resilient collapsible lube in occudably tight engagement with said stator.

4. A peristaltic pump according to claim 3, wherein the arms of the rotor includes spring loaded occluding rollers, each having an axis substantially parallel to the axis of said rotor, each constrained to predetermined limits of outward and inward movement, and capable of receiving collapsible tubes of varying sizes and material durometers.

5. A peristaltic pump according to claim 3 having adjacent each arm two or more guide prefacing in the direction of rotation of each arm, each of which guide restrains the resilient collapsible tube within predetermined limits of inward and outward movement along the axis of the rotor.

6. A peristaltic pump according to claim 5, wherein the guide each comprise a roller secured about a pin normal and running parallel to the axis of the rotor.

7. A peristaltic pump according to claim 2, wherein the rotor is provided with emergency crank, comprising:

(a) lever engaging said rotor having an axis normal and running parallel to the axis of the rotor and hingedly and pivotably connected to said rotor; and

(b) knob for manually cranking said rotor in an emergency.

8. A peristaltic pump according to claim 7, wherein the lever is provided with engagement for engaging on the axis of the rotor a power source for said peristaltic pump and for fixably securing in a predetermined alignment said peristaltic pump to said power source.

9. A peristaltic pump according to claim 7, wherein the engagement comprises a drive pin having an axis normal and running through the axis of the rotor when the drive pin engages and secures the power source.

10. A peristaltic pump according to claim 7, wherein the lever is hingedly and pivotably connected to said rotor by pin affixed between two protruding bar which are adapted to receive said lever in close fitting engagement so as to transfer stress of the rotor and stress from the occlusion of the resilient collapsible tube from the pin to the rotor.

11. A peristaltic pump according to claim 2, wherein the rotor has bearing which engages shaft of the base member in close fitting engagement.

12. A peristaltic pump according to claim 11, wherein the bearing comprises cylindrical sleeve rotatable about the shaft and secured to the rotor which sleeve are of a washable polyethylene having a molecular weight from about 2×

10⁶ to about 5×

10⁶ so as to avoid lubrication.

13. A peristaltic pump according to claim 4, wherein each of the spring loaded rollers comprise cylindrical sleeve rotatable about the axis of said roller, which cylindrical sleeve are of a washable polyethylene having a molecular weight from about 2×

10⁶ to about 5×

10⁶ so as to avoid lubrication.

14. A peristaltic pump according to claim 6, each roller of said guide comprises cylindrical sleeve rotatable about said pin, which cylindrical sleeve are of a washable polyethylene having a molecular weight of from about 2×

10⁶ to about 5×

10⁶ so as to avoid lubrication.

15. A peristaltic pump according to claim 1, wherein the fixed stator provides axle parallel to the axis of the rotor adapted to slidably receive in close-fitting engagement the door stator for hingedly and pivotably connecting the door stator to the fixed stator.

16. The peristaltic pump of claim 1, wherein the door stator is secured to the fixed stator by one or more off-center toggle latches.

17. The peristaltic pump of claim 1, wherein the fixed stator member has two retaining orifices for receiving the inlet and outlet sections of said resilient collapsible tube in or out of the stator.

18. The peristaltic pump of claim 1 further including a pump segment fitting permanently secured around the resilient collapsible tube.

19. The peristaltic pump of claim 1, wherein the base member and fixed stator are one piece of continuous material.

20. The peristaltic pump of claim 19, wherein the continuous material is aluminum.

21. The peristaltic pump of claim 19, wherein the continuous material is an injection-molded glass-filled polycarbonate.

22. The peristaltic pump of claim 1, wherein the lid further comprises window for viewing operation of the rotor when the pump is in use.

23. The peristaltic pump of claim 1, wherein the lid is hingedly and pivotably connected to the door stator by a remote offset hinge pivoting on an axis perpendicular to the axis of the rotor.