MEMS check valve chip and methods
First Claim
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1. An IOP control device for implantation in an eye of a patient, comprising:
- a first chip including;
a first side and an opposing second side; and
an outlet port extending from the first side to the second side and sized to permit fluid flow therethrough from the first side to the second side;
a second chip having an outer side and an inner side, wherein the first chip and the second chip stack to form a fluid flow passageway between the first side of the first chip and the inner side of the second chip, the fluid flow passageway having a fluid flow passageway pressure;
an inlet valve comprising a flexible inlet membrane, the flexible inlet membrane being movable between a closed position inhibiting fluid flow and an open position permitting fluid flow through the inlet valve; and
an outlet valve comprising a flexible outlet membrane anchored to the first side of the first chip to overlie the outlet port, the outlet membrane including at least one outlet aperture sized to permit fluid flow therethrough and a sealing portion, the sealing portion being movable between a closed position wherein the sealing portion deflects away from the second side toward fluid flow passageway to inhibit fluid flow through the outlet aperture and an open position wherein the sealing portion displaces into the outlet port toward the second side to permit fluid flow through the outlet aperture.
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Abstract
A MEMS check valve chip is described. The chip comprises a first side and an opposing second side, an outlet port extending from the first side to the second side, and a flexible outlet membrane anchored to the first side to overlie the outlet port. The flexible outlet membrane includes an outlet aperture and a sealing portion, and the sealing portion is movable between a closed position inhibiting fluid flow through the outlet aperture and an open position wherein the sealing portion displaces into the outlet port to permit fluid flow through the outlet aperture.
201 Citations
12 Claims
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1. An IOP control device for implantation in an eye of a patient, comprising:
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a first chip including; a first side and an opposing second side; and an outlet port extending from the first side to the second side and sized to permit fluid flow therethrough from the first side to the second side; a second chip having an outer side and an inner side, wherein the first chip and the second chip stack to form a fluid flow passageway between the first side of the first chip and the inner side of the second chip, the fluid flow passageway having a fluid flow passageway pressure; an inlet valve comprising a flexible inlet membrane, the flexible inlet membrane being movable between a closed position inhibiting fluid flow and an open position permitting fluid flow through the inlet valve; and an outlet valve comprising a flexible outlet membrane anchored to the first side of the first chip to overlie the outlet port, the outlet membrane including at least one outlet aperture sized to permit fluid flow therethrough and a sealing portion, the sealing portion being movable between a closed position wherein the sealing portion deflects away from the second side toward fluid flow passageway to inhibit fluid flow through the outlet aperture and an open position wherein the sealing portion displaces into the outlet port toward the second side to permit fluid flow through the outlet aperture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification