Back to results
US 12,186,166 B2Granted
Heat-assisted pumping systems for use in negative pressure wound therapy
AssigneeSmith & Nephew, Inc.
InventorAllan Kenneth Frazer Grugeon Hunt
Life of this patent
Estimating the term…
Abstract
A device and method for treating a wound of a patient with negative pressure is provided. The device comprises a heat-assisted pump system. The pump system can be powered in part by heat derived from the patient. The pump system may be configured to be highly planar, light weight, and portable. The pump system may comprise a Stirling engine or a thermal acoustic engine.
Claims18
A negative pressure wound therapy system, comprising:
- a wound dressing configured to form a seal over a wound site of a patient;
- and
- a pump system configured to be in fluid communication with the wound dressing, the pump system further comprising:
- a housing;
- and
- a negative pressure source;
- wherein:
- the negative pressure source comprises a plurality of bellows each configured to move from a compressed position to an expanded position;
- the negative pressure source further comprises a pump actuator comprising a swash plate in contact with each of the plurality of bellows;
- the swash plate is configured to tilt back and forth about only one axis;
- the pump system is configured such that a tilting of the swash plate back and forth about only one axis moves the plurality of bellows at least from the expanded position to the compressed position;
- a vacuum pressure is generated by compressing the plurality of bellows into the compressed position and a subsequent recovery of the plurality of bellows from the compressed position to the expanded position generates the vacuum pressure within the wound dressing;
- and
- the pump system is incorporated into the wound dressing to form a single unit.
11 more elements
A negative pressure wound therapy system, comprising:
- a wound dressing configured to form a seal over a wound site of a patient;
- and
- a pump system configured to be in fluid communication with the wound dressing, the pump system further comprising:
- a housing;
- and
- a negative pressure source;
- wherein:
- the negative pressure source comprises one or more bellows configured to move from a compressed position to an expanded position and a pump actuator comprising a canted swash plate in contact with the one or more bellows and configured to move the one or more bellows at least from the expanded position to the compressed position by tilting back and forth about only one axis;
- a vacuum pressure is generated by compressing the one or more bellows into the compressed position and a subsequent recovery of the one or more bellows from the compressed position to the expanded position generates the vacuum pressure within the wound dressing;
- and
- the pump system is incorporated into the wound dressing to form a single unit.
8 more elements
Dependencies are inferred from the claim text.