MANUALLY-ACTUATED REDUCED PRESSURE TREATMENT SYSTEM HAVING REGULATED PRESSURE CAPABILITIES

摘要

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.

主权项

1. A manually-actuated reduced-pressure pump, comprising:
a first barrel having and a closed end; a piston movably disposed within the first barrel, a charging chamber being defined between the closed end of the first barrel and the piston; a piston spring operably associated with the piston to bias the piston in a direction that allows an increase in a volume of the charging chamber; a seal disposed within the first barrel, a regulated chamber being defined between the seal and the piston; a regulator passage providing fluid communication between the charging chamber and the regulated chamber; a second barrel operably associated with the piston to move the piston toward a compressed position; and a valve body operably associated with the regulator passage to selectively allow or prevent fluid communication between the charging chamber and the regulated chamber.