| 摘要 |
<p>The present invention features a valve (3) constructed using an electrolytic fluid, the fluid releasing a gas when subject to an electronic current, the same gas absorbed again by the fluid when such current is removed. The fluid is housed within an actuation chamber (25) such that the out-gassing of the fluid deforms the membranes (21, 22, 23) defining the chamber. The membranes (21, 22, 23) are positioned such that this deformation will inhibit or completely restrict the flow pathway (41, 42) between the reservoir and the patient. Through such a design a valve is provided which has complete variability in the possible flow rates but which uses a minimal amount of electronic current. The valve has the safety feature of being in the normally closed position when no energy is provided.</p> |
