Heat exchanges system for patient temperature control with easy loading high performance peristaltic pump

• US 10,502,200 B2
• Filed: 09/21/2017
• Issued: 12/10/2019
• Est. Priority Date: 11/06/2014
• Status: Active Grant

• Current Assignee: Zoll Circulation Incorporated (Asahi Kasei Corporation)
• Original Assignee: Zoll Circulation Incorporated (Asahi Kasei Corporation)
• Inventors: Hendricks, Austin Reid, Pamichev, Christo Petrov, Gurukula, Venkata Vishnu, Dabrowiak, Jeremy Thomas
• Primary Examiner(s): Bertheaud, Peter J
• Application Number:
  US15/711,276
• Publication Number:
  US 20180128258A1
• Time in Patent Office: 810 Days
• Field of Search: 4174773, 4174778, 41747711
• CPC Class Codes: A61F 2007/0054 with a closed fluid circuit, e.g. hot water
• CPC Class Codes: A61M 5/14232 Roller pumps
• CPC Class Codes: F04B 43/12 having peristaltic action
• CPC Class Codes: F04B 43/1223 the actuating elements, e.g. rollers, moving in a straight line during squeezing
• 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
• CPC Class Codes: F04B 43/1292 Pumps specially adapted for several tubular flexible members

Abstract

A peristaltic pump has an arcuate raceway with a partially concave inner surface extending through an arc of at least one hundred eighty degrees (180°). The arc defines a midpoint, and a rotor faces the inner surface of the raceway and is both rotatable relative to the raceway and translationally movable relative to the raceway between a pump position, wherein the rotor is spaced from the midpoint a first distance, and a tube load position, wherein the rotor is spaced from the midpoint a second distance greater than the first distance. A motor is coupled to the rotor to rotate the rotor plural are rollers arranged on the rotor to contact tubing disposed between the rotor and the raceway when the rotor is in the pump position. The motor is prevented from stopping at a predetermined angular position to facilitate loading and unloading tubing.

Claims

1. A pump, comprising:

an arcuate raceway having a concave inner surface;

a rotor facing the inner surface of the raceway, the rotor being rotatable relative to the raceway, the rotor being translationally mounted relative to the raceway between a pump position, wherein the rotor is spaced from the inner surface a first distance, and a tube load position, wherein the rotor is spaced from the inner surface a second distance greater than the first distance;

a motor coupled to the rotor to rotate the rotor;

plural rollers arranged on the rotor to contact tubing disposed between the rotor and the raceway at least when the rotor is in the pump position;

a mount supporting at least the rotor; and

an actuator coupled to the mount and configured to move the mount to thereby move the rotor between the pump position and the tube load position, wherein the actuator is configured to move the rotor toward the inner surface of the raceway, moving the rotor to the pump position, and to move the rotor toward the tube load position.

2. The pump of claim 1, wherein the concave inner surface of the raceway extends through an arc of between one hundred eighty degrees and two hundred degrees.

3. The pump of claim 1, wherein the rollers comprise:

at least one drive roller on the rotor, the drive roller having a cylindrical outer surface, the entire outer surface being configured to urge against the tube disposed between the rotor and the raceway when the rotor is in the pump position and is rotated, the drive roller having no flanges with peripheries extending beyond the cylindrical outer surface; and

at least one guide roller on the rotor, the guide roller having a cylindrical outer surface and top and bottom flanges defining respective peripheries extending beyond the cylindrical outer surface of the guide roller such that a tube disposed between the rotor and the raceway is received on the cylindrical outer surface of the guide roller between the flanges when the rotor is in the pump position and is rotated.

4. The pump of claim 3, comprising plural drive rollers and plural guide rollers.

5. The pump of claim 3, comprising two and only two drive rollers and two and only two guide rollers.

6. The pump of claim 1, the mount supporting the motor and rotor.

7. The pump of claim 1, wherein the mount is parallel to the raceway when the rotor is in the pump position, the mount being obliquely angled relative to the raceway when the rotor is in the tube load position.

8. The pump of claim 1, wherein the motor is prevented from stopping at at least one angular position in which at least one roller is in a predetermined location, wherein the arc defines opposed arc ends, and the predetermined location of the roller corresponding to the angular position at which the motor is prevented from stopping is at an arc end.

9. The pump of claim 1, comprising a controller configured for controlling the motor and an angular position sensor configured for sensing angular position of the motor and generating a signal indicative thereof to the controller, the controller configured to use the signal to prevent the motor from stopping at an angular position in which at least one roller is in a predetermined location.

10. A method, comprising:

providing a peristaltic pump rotor that has a non-round periphery;

providing respective rollers on the peristaltic pump rotor adjacent the periphery;

rotating the peristaltic pump rotor relative to a raceway to urge fluid through a tube disposed between the raceway and the rotor; and

operating an actuator coupled to a mount of the rotor to move the mount to thereby move the rotor between a pump position and a tube load position, wherein the actuator is configured to move the rotor toward the raceway to establish the pump position and away from the raceway to establish the tube load position.

11. A pump assembly, comprising:

a raceway;

a rotor spaced from the raceway, wherein the rotor is rotatable relative to the raceway and is also translationally mounted relative to the raceway between a pump position, wherein the rotor is spaced from the raceway a first distance, and a tube load position, wherein the rotor is spaced from the raceway a second distance greater than the first distance;

a motor configured to rotate the rotor to urge fluid through a tube disposed between the raceway and the rotor; and

an actuator coupled to the rotor, the actuator configured to pivot the rotor between the pump position and the tube load position, wherein the rotor defines a plane parallel to the raceway when the rotor is in the pump position, the plane defined by the rotor being obliquely angled relative to the raceway when the rotor is in the tube load position in that a first side of the rotor is elevated higher than a second end of the rotor.

12. The pump assembly of claim 11, wherein the raceway has an inner surface extending through an arc of at least one hundred eighty degrees, the arc defining a midpoint, and the rotor faces the inner surface of the raceway.

13. The pump assembly of claim 11, comprising a controller configured to control the motor to automatically prevent the motor from stopping at one or more predetermined angular positions.

14. The pump assembly of claim 12, wherein the inner surface of the raceway extends through an arc of between one hundred eighty degrees and two hundred degrees.

15. The pump assembly of claim 11, comprising:

at least one drive roller on the rotor, the drive roller having a cylindrical outer surface, the entire outer surface being configured to urge against the tube disposed between the rotor and the raceway, the drive roller having no flanges with peripheries extending beyond the cylindrical outer surface; and

at least one guide roller on the rotor, the guide roller having a cylindrical outer surface and top and bottom flanges defining respective peripheries extending beyond the cylindrical outer surface of the guide roller such that the tube disposed between the rotor and the raceway is receivable on the cylindrical outer surface of the guide roller between the flanges.

16. The pump assembly of claim 11, comprising plural drive rollers and plural guide rollers on the rotor.

17. The pump assembly of claim 11, comprising two and only two drive rollers and two and only two guide rollers on the rotor.

18. The pump assembly of claim 11, comprising a motor mount supporting the motor and rotor, the actuator coupled to the motor mount to move the motor mount to thereby move the rotor between the pump position and the tube load position.

19. The pump assembly of claim 18, wherein the motor mount is parallel to the raceway when the rotor is in the pump position, the motor mount being obliquely angled relative to the raceway when the rotor is in the tube load position.

20. The pump assembly of claim 12, wherein the arc defines opposed arc ends, and a predetermined angular position at which the motor is prevented from stopping corresponds to a roller on the rotor being juxtaposed with arc end.

21. The pump assembly of claim 11, comprising an arm pivotably interconnecting the raceway with a motor mount.