# US 10,502,200 B2 · Heat exchanges system for patient temperature control with easy loading high performance peristaltic pump

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- Number: US 10,502,200 B2
- Document ID: US10502200B2
- Status: Granted
- Kind: B2
- Application number: 15/711,276
- Filed: 2017-09-21
- Published: 2018-05-10
- Granted: 2019-12-10
- Earliest claimed: 2014-11-06
- Assignees: Zoll Circulation, Inc.
- Applicants: Zoll Circulation, Inc.
- Inventors: Austin Reid Hendricks; Christo Petrov Pamichev; Venkata Vishnu Gurukula; Jeremy Thomas Dabrowiak
- Web page: https://patentgrep.com/patent/US10502200B2

## CPC

- F04B 43/1253: {by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing}
- F04B 43/12: having peristaltic action
- F04B 43/1276: {Means for pushing the rollers against the tubular flexible member}
- F04B 43/1284: {Means for pushing the backing-plate against the tubular flexible member}
- A61F 2007/0054: {with a closed fluid circuit, e.g. hot water}
- A61M 5/14232: {Roller pumps}
- F04B 43/1223: {the actuating elements, e.g. rollers, moving in a straight line during squeezing}
- F04B 43/1292: {Pumps specially adapted for several tubular flexible members}
- F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F)
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## 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

### Claim 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 1)

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.

### Claim 4 (depends on 3)

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

### Claim 5 (depends on 3)

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

### Claim 6 (depends on 1)

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

### Claim 7 (depends on 1)

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.

### Claim 8 (depends on 1)

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.

### Claim 9 (depends on 1)

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.

### Claim 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.

### Claim 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.

### Claim 12 (depends on 11)

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.

### Claim 13 (depends on 11)

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.

### Claim 14 (depends on 12)

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.

### Claim 15 (depends on 11)

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.

### Claim 16 (depends on 11)

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

### Claim 17 (depends on 11)

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

### Claim 18 (depends on 11)

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.

### Claim 19 (depends on 18)

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.

### Claim 20 (depends on 12)

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.

### Claim 21 (depends on 11)

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