Micro-Valve
AssigneeCellnovo Limited
InventorsJoseph John Cefai, Julian Llewellyn Shapley
Life of this patent
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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.
Claims32
A one-way valve comprising:
- 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.
A pump for pumping liquid therapeutic product, comprising:
- a valve, the valve including:
- a seat;
- 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;
- 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.
(canceled)
An infusion system comprising:
- 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 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.
Dependencies are inferred from the claim text.