Micro-valve
First Claim
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1. A one-way valve comprising:
- a membrane having an inner portion and an outer portion;
a raised seat that extends beyond a plane of the outer membrane portion; and
a conduit extending through the seat to define an inlet of the valve, wherein the inner portion of the membrane is stretched over the raised seat to close the conduit therethrough in a closed condition of the valve, the inner membrane portion being selectively deflected from the raised seat in an open condition of the valve to open said conduit such that a fluid path is created from one side of the membrane to the other, and wherein an outer peripheral portion of the membrane is stiffer than the inner portion such that the membrane deflection is substantially restricted to only the inner portion.
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Accused Products
Abstract
A one-way valve comprises a seat and a membrane having an inner portion that is stretched over the seat, wherein, in use, the inner membrane portion is selectively deflected from the seat such that a fluid path is created from one side of the membrane to the other so as to open the valve, and wherein an outer peripheral portion of the membrane is stiffer than the inner portion such that the membrane deflection is substantially restricted to only the inner portion. The one-way valve may be used in a pump for an infusion system.
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Citations
29 Claims
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1. A one-way valve comprising:
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a membrane having an inner portion and an outer portion; a raised seat that extends beyond a plane of the outer membrane portion; and a conduit extending through the seat to define an inlet of the valve, wherein the inner portion of the membrane is stretched over the raised seat to close the conduit therethrough in a closed condition of the valve, the inner membrane portion being selectively deflected from the raised seat in an open condition of the valve to open said conduit such that a fluid path is created from one side of the membrane to the other, and wherein an outer peripheral portion of the membrane is stiffer than the inner portion such that the membrane deflection is substantially restricted to only the inner portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A pump for pumping liquid therapeutic product,
comprising: a valve, the valve including; a membrane having an inner portion and an outer portion; a raised seat that extends beyond a plane of the outer membrane portion; and a conduit extending through the seat to define an inlet of the valve wherein the inner portion of the membrane is stretched over the raised seat to close the conduit therethrough in a closed condition of the valve, the inner membrane portion being selectively deflected from the raised seat such that a fluid path is created from one side of the membrane to the other so as to open the valve, and wherein an outer peripheral portion of the membrane is stiffer than the inner portion such that the membrane deflection is substantially restricted to only the inner portion; and a pumping chamber having an inlet and an outlet means for causing a change in a volume of the pumping chamber, wherein at least one of the inlet and outlet includes said valve. - View Dependent Claims (25, 26, 27, 28)
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29. An infusion system comprising:
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a pump, the pump including a pumping chamber having an inlet and an outlet means for causing a change in a volume of the pumping chamber, wherein at least one of the inlet and outlet includes a valve, the valve including; a membrane having an inner portion and an outer portion; a raised seat that extends beyond a plane of the outer membrane portion having a conduit formed therethrough defining an inlet of the valve; and
a conduit extending through the seat to define an inlet of the valve, wherein the inner portion of the membrane is stretched over the raised seat to close the conduit in a closed condition of the valve, the inner membrane portion being selectively deflected from the raised seat such that a fluid path is created from one side of the membrane to the other, andwherein an outer peripheral portion of the membrane is stiffer than the inner portion such that the membrane deflection is substantially restricted to only the inner portion.
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Specification