Negative-pressure source with service timer
OwnerChristopher Brian LOCKE, Richard Daniel John COULTHARDinventors
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Abstract
An apparatus for providing negative-pressure therapy may comprise a negative-pressure chamber and a pneumatically-actuated service timer, which can be used to indicate an expiration or other service condition of the apparatus. The apparatus may further comprise an actuator operable to engage a timer fluid with a migration medium. The timer fluid and the migration medium may be selected so that migration time through the migration medium corresponds to an expiration condition of the apparatus. The timer may also provide indicia of migration progress or termination.
Claims28
An apparatus for providing negative-pressure therapy, the apparatus comprising:
- a negative-pressure chamber;
- a piston disposed in the negative-pressure chamber and configured to move along an axis of the negative-pressure chamber;
- a timer;
- and
- an actuator configured to initiate the timer in response to movement of the piston along the axis of the negative-pressure chamber.
A negative-pressure pump comprising:
- a charging chamber;
- a piston disposed in the charging chamber and configured to move along an axis of the charging chamber;
- and
- a timer configured to be initiated in response to receiving a force and to indicate a service condition of the negative-pressure pump, the timer comprising:
- a flexible membrane forming a fluid reservoir, and
- a migration medium configured to receive fluid from the fluid reservoir in response to a compression of the fluid reservoir, wherein the migration medium begins receiving fluid from the fluid reservoir when the timer is initiated.
(canceled)
-42. (canceled)
A negative-pressure pump comprising:
- a charging chamber;
- a timer configured to indicate a service condition of the negative-pressure pump;
- and
- a piston disposed in the charging chamber and configured to move along an axis of the charging chamber to actuate the timer.
-54. (canceled)
Dependencies are inferred from the claim text.