# US 10,946,122 B2 · Manually-actuated reduced pressure treatment system having regulated pressure capabilities

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,946,122 B2
- Document ID: US10946122B2
- Status: Granted
- Kind: B2
- Application number: 15/971,689
- Filed: 2018-05-04
- Published: 2018-09-06
- Granted: 2021-03-16
- Earliest claimed: 2008-05-02
- Assignees: KCI Licensing, Inc.
- Applicants: KCI Licensing, Inc.
- Inventors: Richard Daniel John Coulthard; Timothy Mark Robinson; Christopher Brian Locke
- Web page: https://patentgrep.com/patent/US10946122B2

## CPC

- A61M 1/96: {Suction control thereof}
- A61M 1/67: {Containers incorporating a piston-type member to create suction, e.g. syringes (cupping glasses A61M1/08; with a flexible member creating suction A61M1/68)}
- A61M 1/74: {Suction control (underwater drainage A61M1/61)}
- A61M 1/78: {Means for preventing overflow or contamination of the pumping systems (combined with drainage containers A61M1/60)}
- A61M 1/81: {Piston pumps, e.g. syringes}
- A61M 1/912: {Connectors between dressing and drainage tube}
- A61M 1/92: {with liquid supply means}
- A61M 1/985: {the dressing itself forming the collection container}
- A61M 2205/073: Syringe, piston type
- A61M 2205/3337: Controlling, regulating pressure or flow by means of a valve by-passing a pump
- 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 reduced pressure treatment apparatus includes a charging chamber storing a first pressure less than an ambient pressure and a regulated chamber storing a second pressure less than the ambient pressure. The first pressure is less than the second pressure. A conduit provides fluid communication between the regulated chamber and the charging chamber. A regulator member is operably associated with the conduit to prevent fluid communication through the conduit when the second pressure is less than or equal to a desired therapy pressure and to allow fluid communication through the conduit when the second pressure exceeds the desired therapy pressure.

## Claims

### Claim 1

A reduced-pressure pump, comprising:
a first barrel having a passage;
a second barrel received by the passage of the first barrel;
a charging chamber within the passage;
a regulated chamber within the passage;
a regulator passage between the charging chamber and the regulated chamber; and
a valve body operably associated with the regulator passage to regulate fluid communication between the charging chamber and the regulated chamber through the passage based on a differential between ambient pressure and pressure in the regulated chamber.

### Claim 2 (depends on 1)

The reduced-pressure pump of claim 1, wherein the second barrel is slidingly received by the passage of the first barrel.

### Claim 3 (depends on 1)

The reduced-pressure pump of claim 1, further comprising a regulator spring operably associated with the valve body to bias the valve body toward an open position.

### Claim 4 (depends on 1)

The reduced-pressure pump of claim 1, further comprising a piston movably disposed within the regulator passage between the charging chamber and the regulated chamber.

### Claim 5 (depends on 4)

The reduced-pressure pump of claim 4, wherein the regulator passage is disposed within the piston.

### Claim 6 (depends on 4)

The reduced-pressure pump of claim 4, wherein the regulated chamber is defined within the piston.

### Claim 7 (depends on 4)

The reduced-pressure pump of claim 4, wherein the piston comprises:
an outer wall;
an inner wall;
an outer floor joining the outer wall and the inner wall;
an annulus between the outer wall and the inner wall; and
a plurality of radial supports positioned between the outer wall and the inner wall in the annulus.

### Claim 8 (depends on 4)

The reduced-pressure pump of claim 4, further comprising a seal disposed between the second barrel and the piston.

### Claim 9 (depends on 8)

The reduced-pressure pump of claim 8, wherein the valve body is coupled to the seal.

### Claim 10 (depends on 8)

The reduced-pressure pump of claim 8, wherein the regulated chamber is defined between the seal and the piston.

### Claim 11 (depends on 8)

The reduced-pressure pump of claim 8, wherein:
the regulated chamber is defined between the seal and the piston; and
the valve body is coupled to the seal.

### Claim 12 (depends on 8)

The reduced-pressure pump of claim 8, wherein:
the regulated chamber is defined between the seal and the piston;
the valve body is coupled to the seal; and
the seal is configured to allow fluid to exit the charging chamber if the second barrel is compressed within the first barrel.

### Claim 13 (depends on 8)

The reduced-pressure pump of claim 8, wherein:
the valve body and the seal are an elastomeric material;
the regulated chamber is defined between the seal and the piston;
the valve body is coupled to the seal; and
the seal is configured to allow fluid to exit the charging chamber if the second barrel is compressed within the first barrel.

### Claim 14 (depends on 8)

The reduced-pressure pump of claim 8, wherein:
the piston comprises an inner bowl; and
the regulated chamber is defined by the inner bowl and the seal.