Patent ID: 11964093
Assignee: SMITH & NEPHEW PLC
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 8:
9. A reduced pressure treatment system comprising:
a dressing adapted to be positioned at a tissue site;
a first chamber comprising an output port adapted to be in fluid communication with the dressing and adapted to deliver a desired therapy pressure to the tissue site at a first negative pressure level;
a second chamber adapted to store a negative pressure at a second negative pressure level;
a single conduit adapted to provide fluid communication between the first chamber and the second chamber, wherein the single conduit pneumatically connects the first chamber and the second chamber in series;
a first valve operably associated with the single conduit, the first valve adapted to substantially close in response to a first pressure difference between the first chamber and the second chamber and to open in response to a second pressure difference between the first chamber and the second chamber; and
a second valve coupled to the second chamber and adapted to be fluidly coupled to an external reduced-pressure source to permit reduction of pressure in the second chamber,
wherein negative pressure is communicated through the second valve to the second chamber and from the second chamber through the first valve to the first chamber,
wherein the first valve, the first chamber, the second valve, and the second chamber are arranged in series along the single conduit.